Looking for an addition contractor in Oklahoma City, OK? Describe your project once and up to three addition contractors who work in Oklahoma City and Oklahoma County get back to you with a quote. It's free and there is no obligation.
Oklahoma City is home to about 712,919 people (2024 Census Bureau estimate), a growing community (+4.7% since 2020). With 1,175 people per sq mi, it is a suburban area. Growing families here often add space instead of moving.
Oklahoma City at a glance
- Population (Census Bureau estimate, 2024)
- 712,919 (+4.7% since 2020)
- Rank in Oklahoma
- 1st of 591 cities and towns
- Land area
- 606 sq mi
- Population density
- 1,175 people per sq mi (suburban)
- Type
- City (Oklahoma City city)
- Main county
- Oklahoma County
What to check before hiring in Oklahoma City
- Zoning: check Oklahoma City's setbacks, lot coverage and height limits first.
- License and permit: in Oklahoma, additions are built by licensed contractors under a permit.
- Structure: second stories need an engineer to check the existing house.
- Price drivers: size, foundation, roof tie-in, plumbing and finishes.
Useful official resources
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ICC: International Code Council
Official information and guidance.
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NAHB
Official information and guidance.
Services available in Oklahoma City
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Room addition
Ground-floor addition with foundation, framing, roof and finishes.
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Second-story addition
New floor over the existing house, with structural engineering.
Frequently asked questions in Oklahoma City
How much does an addition cost in Oklahoma City, OK?
It depends on size, foundation and finishes. Describe your project: contractors who serve Oklahoma City reply with a quote.
How long does it take?
Often a few months, plus design and permits.
Does an addition raise property taxes?
Usually, since it increases the assessed value.
Which addition contractors will contact me?
Up to three independent addition contractors who serve Oklahoma City and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.