---
title: "Second Story Additions In Central Iowa | Busy Builders"
description: "Second story additions across Central Iowa. Most projects run $100,000 to $300,000+. Registered Iowa contractor since 2020. Free estimates."
url: "https://busybuildersiowa.com/second-story-additions/"
---

# Second Story Additions Central Iowa

A second story addition can double your living space without giving up your yard. Busy Builders designs and builds second stories across Central Iowa. Most addition projects run $300 to $600 or more per square foot.

[Get Your Free Estimate](https://busybuildersiowa.com/contact-us/)

- Home Addition Builder

## What Is a Second Story Addition?

A second story addition builds new living space on top of your current home. Some projects add a full second floor. Others add a partial story over a garage or one wing of the house. Either way, you gain bedrooms, baths, or a family room while your lot stays the same.

It fits families who love their street but ran out of room. It also fits smaller lots where building outward is not an option. Every project starts with a structural review, so you know early if your home can carry the load. See [every home addition type we build](https://busybuildersiowa.com/home-additions/), or pair it with [whole home remodeling](https://busybuildersiowa.com/home-remodeling/) to update the rest of the house at the same time. We also broke down [whether a second story addition pays off in Iowa](https://busybuildersiowa.com/second-story-addition-iowa-is-it-worth-2026/) in a separate guide.

### About Us

Since 2020, Busy Builders has completed 1,285+ construction and remodeling projects across [Central Iowa](https://busybuildersiowa.com/service-area/). We build home additions for families who need more space and want it done right the first time.

Every addition we build is designed to match the existing home’s structure, style, and systems so it feels like it was always there.

### Our Mission

Honest pricing, a clear written plan, and no surprise charges on every home addition project we take on.

We tell you what the project actually requires before a single permit is filed, and we do not upsell scope the addition doesn’t need.

### Our Vision

We want to be the registered general contractor that homeowners in [Des Moines](https://busybuildersiowa.com/des-moines/), [West Des Moines](https://busybuildersiowa.com/west-des-moines/), [Ankeny](https://busybuildersiowa.com/ankeny/), [Waukee](https://busybuildersiowa.com/waukee/), [Johnston](https://busybuildersiowa.com/johnston/), and [Grimes](https://busybuildersiowa.com/grimes/) call first when the house isn’t big enough anymore.

[Learn More About Us](https://busybuildersiowa.com/about-us/)

- Frequently Asked Questions

## Why Add a Second Story?

### Double Your Space Without Moving

Add two or three rooms in one project while your address, yard, and mortgage timing stay put.

### Keep the Yard and the Neighborhood

The patio, garden, and school district all stay. You gain space without giving up the street you know.

### Add Bedrooms and Baths Where You Need Them

Bedrooms, a shared bath, or a full primary suite upstairs, planned so the whole house still flows.

### A Practical Answer to a Tight Market

Skip selling fees and a new loan. Invest in the home you already own, with real numbers to compare.

### Built to Match Your Home

Roof lines, exterior finishes, windows, and trim matched so it reads as one house from the curb.

### One Crew From Design to Done

Design, permits, structure, and finishes as one team, with licensed trade pros for the mechanical work.

- Home Additions Step By Step

## How We Build Your Second Story Addition

Step #1

### STRUCTURAL REVIEW & DESIGN

Every second story starts below the second story. A structural engineer reviews your foundation, walls, and framing to confirm they can carry a new floor. Then we design the addition around what your home can support and what your family needs. You approve drawings and a fixed written scope before anything moves.

- Foundation and wall capacity review
- Design drawings you approve first
- Written scope, budget, and timeline

Step #2

### PERMITS & ENGINEERING APPROVALS

Second story additions need a building permit in every Central Iowa city, plus engineered structural plans in most cases. We prepare the drawings, submit the application, and track it through your city building department. You will know the review timeline before demolition day is ever scheduled.

- City building permit handled for you
- Engineered plans where required
- Clear start date before tear off

Step #3

### ROOF REMOVAL & WEATHER PROTECTION

This is the step homeowners worry about most, so we plan it hardest. The existing roof comes off in a tight, scheduled window with temporary weather protection staged and ready. We watch the forecast, work fast, and keep the house sealed against rain at the end of each day.

- Tear off scheduled around weather
- Temporary protection every night
- Daily cleanup and site control

[Get Your Free Estimate](https://busybuildersiowa.com/contact-us/)

Step #4

### FLOOR & WALL FRAMING

The new floor system ties into the structure the engineer approved. Then the second story walls go up, with openings framed for windows and the stair connection cut in. This is when the addition takes shape and the project starts to feel real.

- New floor system tied to structure
- Walls and window openings framed
- Stair connection to the main floor

Step #5

### NEW ROOF, WINDOWS & EXTERIOR

The new roof structure goes on, then windows, doors, and exterior finishes matched to your existing home. Insulation meets the Iowa energy code, following [energy.gov insulation guidance](https://www.energystar.gov/saveathome/seal_insulate) for a tight, efficient envelope. From the street, the goal is one seamless house.

- Roof lines matched to the home
- Windows and exterior finishes blended
- Insulation to Iowa energy code

[Get Your Free Estimate](https://busybuildersiowa.com/contact-us/)

Step #6

### MECHANICAL, FINISHES & WALKTHROUGH

Plumbing, electrical, and heating and cooling rough in first, handled by licensed trade professionals. Then drywall, flooring, paint, and trim bring the space to life. We finish with a full walkthrough of every room. Written warranty on workmanship (details provided in your contract).

- Licensed trade pros for mechanicals
- Drywall, flooring, and finish work
- Final walkthrough room by room

## Permits and Iowa Code for Second Story Additions

Every Central Iowa city requires a building permit for a second story addition, and most require engineered structural plans. New bedrooms need egress windows with at least 5.7 square feet of clear opening. Any new footings must reach below the 42 inch Iowa frost line, and insulation must meet the Iowa energy code. We are registered with [Iowa DIAL](https://dial.iowa.gov/) and handle permits through your city building department. Building [home additions in Des Moines](https://busybuildersiowa.com/locations/home-additions-des-moines-ia/) means working with City of Des Moines Building Services, and each metro city runs its own process.

*Disclaimer: This page is for general information and is not project-specific advice. Cost figures are planning estimates that vary by scope, materials, site conditions, and current pricing. Permit requirements vary by city and jurisdiction; verify current requirements with your local building authority before starting any project. Structural changes require evaluation by a qualified professional, so do not rely on general guidance for load-bearing decisions. No specific outcomes are guaranteed. Consult a registered contractor for guidance specific to your project.*

## What Does a Second Story Addition Cost in Central Iowa?

Most Central Iowa additions run $300 to $600 or more per square foot. Second stories usually sit in the upper part of that range because of the structural work involved. Plan a 10 to 15 percent contingency on top of any estimate. Our [Iowa home addition cost guide](https://busybuildersiowa.com/home-addition-costs-iowa-2026-planning-guide/) breaks down every line item.

Project piece Typical range

Addition construction $300 to $600 or more per square foot

Example: 400 square foot partial second story About $120,000 to $240,000

Full second story over the whole home Priced by scope after the structural review

Added bathroom $15,000 to $40,000, built with [our bathroom remodeling team](https://busybuildersiowa.com/bathroom-remodeling/)

Planning contingency 10 to 15 percent of budget

Based on our published Central Iowa pricing. Your written estimate sets the final numbers.

### Ready to Plan Your Second Story?

Tell us about your home and what you need the new space to do. We will walk the site, review the structure, and give you a clear written estimate with no surprises. Call: 844-435-9800. Or use the form above to request your free estimate. Still weighing options? Compare [sunroom additions](https://busybuildersiowa.com/sunroom-additions/) and [garage additions](https://busybuildersiowa.com/garage-additions/).

- Achievement

## Trusted Second Story Addition Contractors in Central Iowa

Since 2020, Central Iowa homeowners have trusted Busy Builders with 1,285+ completed projects. We are a registered Iowa contractor serving Des Moines, West Des Moines, and the metro around them. You get honest pricing and a clear written plan before work starts.

1285+

Completed Projects​

90+

Skilled Workers​

99%

Satisfaction Rate​

- Frequently Asked Questions

## FAQs About Second Story Additions in Central Iowa

How much does a second story addition cost in Central Iowa?

Most additions run $300 to $600 or more per square foot, and second stories usually land in the upper band because of structural work. Add a 10 to 15 percent contingency. Your written estimate sets the real number for your home.

Can my house support a second story?

Many Central Iowa homes can, but not all. A structural engineer reviews your foundation, walls, and framing before design starts. Some homes need reinforcement first. We tell you straight what your home can carry before you spend on drawings.

Do we have to move out during the build?

Many families stay elsewhere during tear off and framing, then move back for the finish work. Some partial second stories allow you to stay the whole time. We map this out with you during design so there are no surprises.

How long does a second story addition take?

Most Central Iowa additions run 3 to 6 months from permit approval, and second stories often land at the longer end. Weather during the roof removal window matters. We build the schedule around it and keep you updated weekly.

Will the second story match the rest of our house?

Yes. We match roof lines, exterior finishes, windows, and trim so the addition reads as part of the original home. Inside, the stair location and layout are planned so the whole house flows as one.

Is a second story better than a ground level addition?

It depends on your lot and your budget. Ground level additions cost less per square foot but use up yard space. Second stories keep the lot open but need more structural work. We price both paths so you can compare.

- Home Addition Blogs

## Home Addition Guides for Central Iowa

[Learn More About Home Additions](https://busybuildersiowa.com/category/home-additions-blogs/)

[Aug 23, 2026By Blake Daniels ### Home Addition Cost in State Center, Iowa: 2026 Guide Read More Home additions in State Center start at $300 per square foot. Cost by type, Iowa frost line requirements, and how small-city inspection works.Home additions in State Center start at $300 per square foot. Cost by type, Iowa frost line requirements, and how small-city inspection works.Home additions in State Center start at $300 per square foot. Cost by type, Iowa frost line requirements, and how small-city inspection works.](https://busybuildersiowa.com/home-addition-cost-state-center-iowa-2026/)[Aug 12, 2026By Blake Daniels ### Home Addition Cost in Panora, Iowa: 2026 Guide Read More Home additions in Panora start around $300 per square foot. Cost by type, the city's contracted inspection process, and what actually drives the budget.Home additions in Panora start around $300 per square foot. Cost by type, the city's contracted inspection process, and what actually drives the budget.Home additions in Panora start around $300 per square foot. Cost by type, the city's contracted inspection process, and what actually drives the budget.](https://busybuildersiowa.com/home-addition-cost-panora-iowa-2026/)[Aug 11, 2026By Blake Daniels ### Home Addition Costs in Urbandale: 2026 Pricing Guide Read More Home additions in Urbandale start at $300 per square foot. Cost by type, the city's permit portal, and how local code amendments affect your project.Home additions in Urbandale start at $300 per square foot. Cost by type, the city's permit portal, and how local code amendments affect your project.Home additions in Urbandale start at $300 per square foot. Cost by type, the city's permit portal, and how local code amendments affect your project.](https://busybuildersiowa.com/home-addition-costs-urbandale-2026/)

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