---
title: "Home Addition Permits In Iowa: What To Expect In 2026"
description: "Every home addition in Iowa requires a building permit, no exceptions. What varies is the fee, the process, the timeline, and which trade permits ..."
url: "https://busybuildersiowa.com/home-addition-permits-what-to-expect-in-2026/"
---

Busy

Builders

# Home Addition Permits in Iowa: What to Expect in 2026

- [Blake Daniels](https://busybuildersiowa.com/author/blake-daniels/)
- [May 30, 2026](https://busybuildersiowa.com/2026/05/30/)
- 10:22 am

Every home addition in Iowa requires a building permit, no exceptions. What varies is the fee, the process, the timeline, and which trade permits apply on top of the structural one. This guide walks through the permit requirements for a home addition in Central Iowa, what documents you need, the step-by-step process, Iowa-specific code requirements that national guides miss, and what happens when homeowners try to skip the permit entirely.

**TLDR:** Every home addition in Iowa needs a building permit, plus separate permits for electrical, plumbing, and HVAC work. Structural permit fees typically run $400 to $2,000 based on project valuation, and the full timeline from design through final inspection is usually 4 to 7 months. Iowa is a home-rule state, so fees and portals vary by city, but the permit requirement is universal. Unpermitted additions create lender problems, insurance gaps, and resale disclosure issues that almost always cost more to unwind than the original permit would have cost.

You have outgrown your house, or a parent is moving in, or the kids need their own rooms. A home addition makes sense, but before you call a contractor, you want to know what the permit process actually involves. This guide gives you the Iowa-specific answer, from the permits you will need through the timeline to expect and the consequences of skipping the process.

### Do You Need a Permit for a Home Addition in Iowa?

Yes, always. Every city and county in Central Iowa requires a building permit for any home addition. Polk City’s code language is representative: “All new construction, remodels, additions, alterations, removal, conversion, repairs, removal, and demolition require a building permit.” There are no size exemptions for additions, and no workaround that keeps you legal without pulling the permit.

Iowa is a home-rule state, which means each city sets its own permit fee schedule and administers its own review process. The requirement to pull a permit is universal. What varies is the fee, the portal, the review timeline, and the specific documents your city wants to see. **Pro Tip 1:** Before you design anything, call your local building department and ask three questions: What permits do I need for this project? What is your fee schedule? How long is plan review? That 10-minute phone call saves weeks of confusion later.

### What Permits Does a Home Addition Require?

Most homeowners assume one permit covers the whole project. Iowa additions almost always require four separate permits, and the total fee is the sum of all of them.

Permit Type Who Issues It Required When Typical Iowa Fee

Building permit, structural Local city or county building dept Always, for any addition $400 to $2,000+ based on valuation

Electrical permit Local building dept Any new circuits, outlets, panels $50 to $350

Plumbing permit Local building dept Any new water lines, drains, fixtures $30 to $500

Mechanical or HVAC permit Local building dept Any ductwork or new equipment $50 to $150

Zoning or site plan approval Local planning dept Before building permit in most cities Often included or small fee

Fees vary by city and project valuation. Always verify with your local building department before starting. **Pro Tip 2:** Electricians, plumbers, and HVAC contractors typically pull their own trade permits under their Iowa state license, not yours. Your registered general contractor coordinates all four permit tracks, which is one of the biggest reasons hiring a registered Iowa contractor is worth the cost. **Pro Tip 3:** Your building permit fee is usually based on total project valuation, materials plus labor. Get a written, itemized estimate from your contractor so your permit application reflects true project cost, which protects you from re-submittal fees if the valuation is revised upward during review.

### What Documents Do You Need to Apply?

Iowa cities require a consistent set of documents for home addition applications. The specific forms differ, but the categories are the same across jurisdictions.

Document What It Must Show Who Prepares It

Site plan Lot boundaries, addition dimensions, setbacks from all property lines, easements Contractor or homeowner, drawn to scale

Construction drawings Floor plan, wall sections, foundation and footing detail, door and window locations Contractor; engineer stamp required for complex or structural projects

Elevation drawings How addition ties into existing roofline, all four exterior sides Contractor

Energy code compliance Iowa 2012 IECC with state amendments, applies to new addition footprint Contractor or designer

Trade contractor info DIAL registration numbers, Iowa state license info for electricians, plumbers, HVAC General contractor

Permit application form City-specific, available online at each city’s portal Homeowner or contractor

**Pro Tip 4:** If your addition involves a structural change to the existing house, a load-bearing wall removal, a second-story build, or anything altering the main roof, most Iowa cities require stamped engineering drawings. Budget $1,500 to $4,000 for a structural engineer if that applies to your project. **Pro Tip 5:** Iowa’s 2012 IECC energy code applies to the new addition square footage only. It does not require you to bring the rest of the existing house up to current energy code as part of the addition project. This is a common misunderstanding that scares homeowners unnecessarily.

### The Iowa Home Addition Permit Process Step by Step

The process is consistent across Central Iowa cities, even though the specific portal and fee schedule vary.

Phase Typical Duration Notes

Plan preparation 2 to 8 weeks Longer for structural, second-story, or complex projects

Permit review 5 business days to 2 weeks Simple residential projects review faster

Construction 2 to 4 months typical 6 to 8 weeks for small additions

Inspections Scheduled throughout Footing, framing, rough trades, final

Total, design to final 4 to 7 months Plan for this in your timeline

The ten steps from beginning to end: first, confirm which jurisdiction has permitting authority for your property, city or county; second, check zoning and setback rules with the local planning department before designing anything; third, prepare plans, either through a contractor or as an owner-builder; fourth, verify property corners and lot lines, which some Iowa cities require visible at foundation inspection; fifth, submit the application plus documents plus fees through the city’s online portal or in person; sixth, wait for plan review; seventh, respond to any reviewer comments or corrections; eighth, pay fees and receive the permit; ninth, post the permit on the construction site and begin work; tenth, schedule required inspections at each phase and receive final approval or certificate of occupancy.

**Pro Tip 6:** Ankeny uses the Ankeny One Stop Online Portal at 515-963-3533. Waukee uses its portal at 515-978-9533. Johnston accepts applications at 6221 Merle Hay Rd with review up to 7 business days. Polk City uses citizenserve.com. Scott County charges a $100 plan review fee that is deducted from the permit fee. These are the current processes for each city but they do change, so always verify with the specific city where your property sits.

### Required Inspections for an Iowa Home Addition

A typical Iowa home addition requires five to seven separate inspections, each scheduled at a specific construction phase. Footing and foundation inspection happens before the concrete pour, when forms and rebar are in place. Rough framing inspection happens before insulation and drywall go in, when the structural skeleton is visible. Rough electrical, plumbing, and mechanical inspections happen at the same phase, each by the respective trade inspector. Insulation inspection happens before drywall in some jurisdictions. Final inspection happens at project completion, with separate electrical, plumbing, and mechanical finals typically required.

**Pro Tip 7:** Missing or failing an inspection does not kill the project. It delays it by a few days, sometimes a week, while you correct the issue and reschedule. What does kill a project is skipping an inspection to save time. A missed foundation or framing inspection can require opening up finished walls later to verify the work, which costs far more than scheduling the inspection correctly the first time.

### Iowa-Specific Code Requirements for Home Additions

Several Iowa-specific requirements apply to every home addition in Central Iowa, and national guides miss most of them.

Frost footings must extend at least 42 inches below grade. Iowa’s frost line depth is a minimum of 42 inches. Some northern Iowa jurisdictions apply more conservative depths, so always verify with your local building department. Any foundation, including for a deck, a garage, or an addition, must reach below the frost line. Shallower footings heave when the ground freezes and thaws, and the damage shows up as cracked finishes within a year or two.

Any bedroom addition requires a code-compliant egress window. Iowa follows the IRC specification: minimum 5.7 square feet of net clear opening, minimum 24-inch height, minimum 20-inch width, and maximum 44-inch sill height above the floor. The window must open from inside without tools. This requirement is most critical for basement bedroom additions, though it applies to any new sleeping room regardless of floor level. In Polk, Dallas, Madison, and Warren counties, a bedroom is defined by both the egress window AND a closet, which matters if you are trying to advertise a new space as a bedroom at resale. **Pro Tip 8:** Adding a basement bedroom for a teenager or guest suite is one of the most common Iowa projects, and missing egress window compliance is the single most common code failure in Central Iowa. Verify dimensions before ordering the window.

The Iowa 2012 IECC energy code applies to the new addition footprint, covering insulation values, window U-factors, air sealing, and duct sealing. It does not require bringing the existing house up to current energy code as part of the addition. **Pro Tip 9:** Iowa’s clay soil shifts with moisture and frost. Foundation design must account for drainage and soil conditions specific to your lot. A $500 to $800 geotechnical review is worth doing on any major addition in Central Iowa.

Two additional Iowa considerations: GFCI outlets are required in any kitchen, bathroom, garage, or exterior portion of an addition, and smoke and carbon monoxide detector requirements update when livable square footage increases, meaning you may need to add detectors to existing rooms as part of the addition. Also, Iowa has the highest residential radon levels in the country, with as many as 5 in 7 Iowa homes testing above the EPA action level. For an addition adjacent to basement living space, radon testing and radon-resistant construction are worth considering as a recommendation, though they are not code requirements for a standard addition.

### What Happens If You Don’t Pull a Permit?

Skipping the permit is one of the most expensive mistakes an Iowa homeowner can make, and the costs almost never show up until years later.

Short-term consequences include stop-work orders from the building department and fines, which typically run 2 to 10 times the permit fee in Iowa. In serious cases, the city can order required demolition or removal of non-compliant work. If you are midway through construction when the city discovers an unpermitted project, you may be forced to tear open finished walls to allow retroactive inspection, which can add $10,000 to $30,000 in rework costs on a typical addition.

Long-term consequences are worse. Title insurance does not cover unpermitted work because it protects ownership, not code compliance. Lenders frequently refuse to finance a home that includes unpermitted square footage, or they exclude that square footage from the appraised value, which lowers your sale price. Homeowner’s insurance may deny claims for losses in or caused by unpermitted spaces, leaving you uncovered for fire, water damage, or liability events. Iowa sellers must disclose unpermitted work, which gives buyers leverage to demand price reductions or credits. **Pro Tip 10:** Retroactive permitting is available in some Iowa jurisdictions, but it typically requires exposing structural elements, foundation work, and wiring for inspection, which often means opening finished walls and ceilings. Building right the first time is always cheaper.

### Iowa Home Addition Costs and What Permits Add

Home addition costs in Central Iowa start from $300 per square foot for quality construction. Older national data shows lower figures, but those reflect standard-grade builds in lower-cost markets and do not reflect current Iowa labor and material costs.

Addition Type Iowa Cost Range Typical Permit Cost Timeline

Room addition, bedroom + bath $100,000 to $140,000 $600 to $1,500 3 to 5 months

Primary suite $145,000 to $200,000+ $800 to $1,800 4 to 6 months

Kitchen expansion $100,000 to $150,000 $700 to $1,500 3 to 5 months

Sunroom, 3-season room $15,000 to $80,000 $300 to $900 6 to 12 weeks

Second-story addition $150,000 to $300,000+ $1,000 to $2,500+ 5 to 8 months

Garage addition $32 to $42 per sq ft (Iowa avg) $200 to $600 2 to 4 months

Permit costs are estimates based on Iowa valuation-based fee schedules. Costs vary by city and project scope. Always verify fees with your local building department before submitting. **Pro Tip 11:** For an alternative approach to adding living space, some Central Iowa homeowners find that finishing an existing basement delivers roughly 60 to 75 percent ROI while a full addition typically returns 50 to 65 percent, with the gap narrowing significantly in higher-price-point neighborhoods. The right choice depends on your lot, price point, and how the family will actually use the space. Our [finished basement vs. home addition guide](https://busybuildersiowa.com/finished-basement-vs-home-addition-in-des-moines-metro-which-is-the-best-investment-for-2026/) breaks down the trade-offs.

### How to Hire the Right Contractor

Iowa does not license general contractors. The state requires active registration with the Iowa Department of Inspections, Appeals, and Licensing, known as DIAL, for any general contractor earning more than $2,000 per year. Electricians, plumbers, and HVAC technicians working on your project hold separate Iowa state licenses. A registered general contractor pulls your building permit, coordinates the electrical, plumbing, and mechanical permits through the licensed tradespeople on the job, schedules all required inspections, and stands behind the work. **Pro Tip 12:** Verify your contractor’s active DIAL registration at dial.iowa.gov before you sign anything. Ask for proof of general liability insurance and workers’ compensation. Request three references from similar addition projects. A contractor who cannot produce current DIAL registration, insurance certificates, and references is not the one to hire.

Illustrative scenario: A Johnston family plans a 400-square-foot primary suite addition with a walk-in closet, a full bathroom, and a new foundation. Project valuation: approximately $145,000 to $175,000. Estimated permit costs: building $1,100, electrical $200, plumbing $350, mechanical $100, for roughly $1,750 total in permit fees. Timeline: 2 months for design and plan preparation, 2 weeks for permit review, 4 months for construction, for about 6 months total from signing to certificate of occupancy. Illustrative planning example only, not a verified Busy Builders project.

### Frequently Asked Questions

**Q: Do I need a permit for a home addition in Iowa?** Yes, always. Every home addition in Iowa requires a building permit regardless of the city or county. Separate trade permits are also required for electrical, plumbing, and HVAC work. Iowa is a home-rule state, so each city runs its own process, but the permit requirement is universal. No legal workaround exists that keeps you code-compliant without pulling the permit.

**Q: How much does a permit cost for a home addition in Iowa?** Iowa permit fees are valuation-based, typically running 0.5 to 2 percent of total project cost. For a typical $100,000 to $150,000 room addition, expect $600 to $1,800 in structural permit fees plus $100 to $600 for the trade permits. Small additions under $50,000 usually run $400 to $900 in total permits. Large additions over $200,000 can run $1,200 to $3,000 or more. Always call your local building department for a pre-application estimate.

**Q: How long does a home addition permit take in Iowa?** Plan review typically takes 5 business days to 2 weeks for residential projects in most Central Iowa cities. Simple projects review faster, while complex or second-story additions take longer. The full timeline from design through final inspection runs 4 to 7 months for most additions. Plan preparation and construction are the biggest time drivers, not the permit review itself.

**Q: What documents do I need for a home addition permit in Iowa?** A completed permit application, a site plan drawn to scale showing lot boundaries and setbacks, construction drawings showing floor plan and wall sections, elevation drawings showing how the addition ties into the existing roofline, Iowa 2012 IECC energy code compliance documentation for the new addition, and trade contractor DIAL registration and license information. Structural and second-story projects typically require stamped engineering drawings as well.

**Q: What happens if I build a home addition without a permit in Iowa?** Short-term: stop-work orders and fines of 2 to 10 times the permit fee, and sometimes required demolition. Long-term: title insurance does not cover unpermitted work, lenders may refuse financing at resale, homeowner’s insurance may deny claims involving unpermitted spaces, and Iowa law requires disclosure to buyers at sale. Retroactive permits exist in some jurisdictions but typically require opening walls and foundation for inspection, which almost always costs more than the original permit would have.

**Q: Can I pull my own permit for a home addition in Iowa?** Yes, most Iowa cities allow homeowners to pull permits for their own primary residence as owner-builders. However, electricians, plumbers, and HVAC contractors working on your project must hold separate Iowa state licenses and will typically pull their own trade permits. All work still requires scheduled inspections and must meet code regardless of who pulls the permit.

### Key Takeaways

**Permits Required**

- Building permit for the structural work, always
- Separate electrical, plumbing, and HVAC permits on top
- Zoning or site plan approval before the building permit

**Cost**

- Building permit: $400 to $2,000+ based on valuation
- Trade permits: $100 to $1,000 combined
- Total typical permit cost: $500 to $3,000 for most Central Iowa additions

**Timeline**

- Plan prep: 2 to 8 weeks
- Permit review: 5 business days to 2 weeks
- Construction: 2 to 4 months
- Total: 4 to 7 months from design to final inspection

**Iowa Code Specifics**

- Frost footings: 42 inches minimum for Central Iowa
- Bedroom additions: egress window required, 5.7 sq ft opening, 24-in height, 20-in width, 44-in max sill
- Bedroom definition in Polk, Dallas, Madison, Warren counties: requires egress + closet
- Energy code applies to new addition footprint, not existing house

**Risk of Skipping**

- Fines 2 to 10 times permit fee
- Title insurance does not cover unpermitted work
- Lenders may exclude unpermitted square footage from appraisal
- Required seller disclosure at resale

### Ready to Plan Your Iowa Home Addition?

Busy Builders has completed more than 1,285 projects since 2020. We work throughout [Des Moines](https://busybuildersiowa.com/des-moines/), West Des Moines, Waukee, [Ankeny](https://busybuildersiowa.com/ankeny/), Johnston, [Grimes](https://busybuildersiowa.com/grimes/), Urbandale, and [Ames](https://busybuildersiowa.com/ames/). Every project starts with a free consultation, a line-item written estimate, and a registered contractor who pulls the building permit, coordinates trade permits through licensed electricians and plumbers, and schedules every required inspection. For the full scope of what we build, see our [home additions](https://busybuildersiowa.com/home-additions/) page, which covers room additions, sunrooms, and ADUs.

Call: [844-435-9800](tel:844-435-9800) Website: [https://busybuildersiowa.com/](https://busybuildersiowa.com/)

We would rather give you an honest timeline and permit-included line-item estimate than a low bid with surprise permit and inspection costs later. Reach out whenever you are ready.

### Legal Disclaimer

All cost figures in this article are general planning estimates based on Iowa construction data, city-specific permit fee schedules, and national averages. Actual costs vary by project scope, site conditions, materials, city permit fees, and current labor and material pricing. Get a written, itemized estimate for your specific project. Permit fees, setbacks, code requirements, and review timelines vary by city and change over time; always verify current rules directly with your local building department before starting any project. Iowa is a home-rule state and each municipality administers its own permit process. Illustrative scenarios are planning examples, not verified Busy Builders projects. Consult a DIAL-registered Iowa contractor and, where applicable, licensed electricians, plumbers, HVAC technicians, and a structural engineer for guidance specific to your property and project. This article is not legal, financial, or real estate advice.

Busy Builders | Full-Service Construction and Remodeling | Serving Central Iowa Since 2020

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[August 27, 2026](https://busybuildersiowa.com/basement-finishing-cost-story-city-iowa-2026/) | By [Blake Daniels](https://busybuildersiowa.com/author/blake-daniels/)

### [Basement Finishing Cost in Story City, Iowa: 2026 Guide](https://busybuildersiowa.com/basement-finishing-cost-story-city-iowa-2026/)

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[August 21, 2026](https://busybuildersiowa.com/basement-finishing-cost-new-virginia-iowa-2026/) | By [Blake Daniels](https://busybuildersiowa.com/author/blake-daniels/)

### [Basement Finishing Cost in New Virginia, Iowa: 2026 Guide](https://busybuildersiowa.com/basement-finishing-cost-new-virginia-iowa-2026/)

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[August 18, 2026](https://busybuildersiowa.com/basement-finishing-costs-norwalk-2026/) | By [Blake Daniels](https://busybuildersiowa.com/author/blake-daniels/)

### [Basement Finishing Costs in Norwalk: 2026 Guide](https://busybuildersiowa.com/basement-finishing-costs-norwalk-2026/)

Most Norwalk basement finishing projects run $35,000 to $85,000. Cost by scope, permits through the Building Department, and Iowa egress requirements.

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### [Basement Finishing Cost in Boxholm, Iowa: 2026 Guide](https://busybuildersiowa.com/basement-finishing-cost-boxholm-iowa-2026/)

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[August 10, 2026](https://busybuildersiowa.com/does-finishing-basement-increase-property-taxes-iowa/) | By [Blake Daniels](https://busybuildersiowa.com/author/blake-daniels/)

### [Does Finishing a Basement Increase Property Taxes in Iowa?](https://busybuildersiowa.com/does-finishing-basement-increase-property-taxes-iowa/)

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[August 9, 2026](https://busybuildersiowa.com/basement-remodeling-cost-overruns-avoid/) | By [Blake Daniels](https://busybuildersiowa.com/author/blake-daniels/)

### [Common Cost Overruns in Basement Remodeling and How to Avoid Them](https://busybuildersiowa.com/basement-remodeling-cost-overruns-avoid/)

Moisture, egress, under-slab plumbing, electrical capacity, and ceiling height explain most blown basement budgets. Here is how to catch each one before you sign.

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Founded in 2020 after decades in the trades, the company specializes in custom home building, whole-home remodeling, kitchen and bathroom renovations, basement finishing and remodeling, home additions, and custom deck construction. Every project is managed from design through completion with a focus on transparent communication, honest pricing, detailed planning, and craftsmanship built to handle everyday life, helping families create functional, beautiful spaces that are made to last for generations. 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What varies is the fee, the process, the timeline, and which trade permits ...","name":"Home Addition Permits In Iowa: What To Expect In 2026","@id":"https:\/\/busybuildersiowa.com\/home-addition-permits-what-to-expect-in-2026\/#richSnippet","isPartOf":{"@id":"https:\/\/busybuildersiowa.com\/home-addition-permits-what-to-expect-in-2026\/#webpage"},"image":{"@id":"https:\/\/busybuildersiowa.com\/wp-content\/uploads\/2026\/04\/Home-Addition-Permits-in-Iowa-What-to-Expect-in-2026.png"},"inLanguage":"en-US","mainEntityOfPage":{"@id":"https:\/\/busybuildersiowa.com\/home-addition-permits-what-to-expect-in-2026\/#webpage"}}]},{"@context":"https:\/\/schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Do I need a permit for a home addition in Iowa?","acceptedAnswer":{"@type":"Answer","text":"Yes, always. Every home addition in Iowa requires a building permit regardless of the city or county. Separate trade permits are also required for electrical, plumbing, and HVAC work. Iowa is a home-rule state, so each city runs its own process, but the permit requirement is universal. No legal workaround exists that keeps you code-compliant without pulling the permit."}},{"@type":"Question","name":"How much does a permit cost for a home addition in Iowa?","acceptedAnswer":{"@type":"Answer","text":"Iowa permit fees are valuation-based, typically running 0.5 to 2 percent of total project cost. For a typical $100,000 to $150,000 room addition, expect $600 to $1,800 in structural permit fees plus $100 to $600 for the trade permits. Small additions under $50,000 usually run $400 to $900 in total permits. Large additions over $200,000 can run $1,200 to $3,000 or more. Always call your local building department for a pre-application estimate."}},{"@type":"Question","name":"How long does a home addition permit take in Iowa?","acceptedAnswer":{"@type":"Answer","text":"Plan review typically takes 5 business days to 2 weeks for residential projects in most Central Iowa cities. Simple projects review faster, while complex or second-story additions take longer. The full timeline from design through final inspection runs 4 to 7 months for most additions. Plan preparation and construction are the biggest time drivers, not the permit review itself."}},{"@type":"Question","name":"What documents do I need for a home addition permit in Iowa?","acceptedAnswer":{"@type":"Answer","text":"A completed permit application, a site plan drawn to scale showing lot boundaries and setbacks, construction drawings showing floor plan and wall sections, elevation drawings showing how the addition ties into the existing roofline, Iowa 2012 IECC energy code compliance documentation for the new addition, and trade contractor DIAL registration and license information. Structural and second-story projects typically require stamped engineering drawings as well."}},{"@type":"Question","name":"What happens if I build a home addition without a permit in Iowa?","acceptedAnswer":{"@type":"Answer","text":"Short-term: stop-work orders and fines of 2 to 10 times the permit fee, and sometimes required demolition. Long-term: title insurance does not cover unpermitted work, lenders may refuse financing at resale, homeowner's insurance may deny claims involving unpermitted spaces, and Iowa law requires disclosure to buyers at sale. Retroactive permits exist in some jurisdictions but typically require opening walls and foundation for inspection, which almost always costs more than the original permit would have."}},{"@type":"Question","name":"Can I pull my own permit for a home addition in Iowa?","acceptedAnswer":{"@type":"Answer","text":"Yes, most Iowa cities allow homeowners to pull permits for their own primary residence as owner-builders. However, electricians, plumbers, and HVAC contractors working on your project must hold separate Iowa state licenses and will typically pull their own trade permits. All work still requires scheduled inspections and must meet code regardless of who pulls the permit."}}]}]
```