How much does a home addition cost in Lemay, MO?

Home additions range from $40,000 for a straightforward room expansion to $150,000 or more for a full two-story addition with foundation work and structural engineering. Cost per square foot varies based on finish level, whether HVAC and plumbing extend into the new space, and foundation type.

How long does a home addition take to build?

Most room additions take three to six months from permit approval to final inspection, though complex projects run longer. Permit processing time — which varies significantly by municipality — is often the largest scheduling variable outside of the construction phase itself. Your contractor can provide a project-specific timeline estimate.

How does AboveBoardPros verify addition pros?

We use a 4-Point Verification Standard: 1) Active License Status with Public Works, 2) Corporate Standing (SoS), 3) Insurance Coverage Check, and 4) Reputation Analysis (>4.0 Stars). We reject ~40% of applicants.

How to Find the Right
Home Addition Pro in Lemay.

Adding square footage permanently changes your home's value. A properly permitted, engineer-stamped addition built by screened general contractors passes every inspection and holds its value through every market cycle.

2 ZIP codes servedState records cross-checkedMidtown Home Improvements · 4.1★ on Google

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1 home addition contractor serving Lemay·1 government record-verified·Insurance cross-checked

5 Things Every Lemay Homeowner Should Verify

Most contractor problems are preventable. These checks take under an hour and catch the most common hiring mistakes.

Ask for their MO contractor license number, then verify it yourself at the state licensing website before signing anything.
Request a certificate of insurance. Call the carrier directly to confirm general liability and workers' comp are active.
Get at least three written bids. Any quote more than 30% below average is a red flag, not a deal.
Ask specifically about permit requirements for home addition. A contractor who says "no permit needed" for structural work is a liability.
Read recent Google and BBB reviews for complaint patterns, not just star averages. One-star reviews reveal how disputes get resolved.

AboveBoardPros handles checks 1 and 2 for you.

Every contractor on this page has been checked against the MO state contractor database, with insurance verified via certificate of insurance where shown. You negotiate the contract, but you start from a verified shortlist.

What Lemay Homeowners Are Searching For

"home addition cost per square foot"

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Get Home Addition Quotes in Lemay

Pros we've checked against state records and insurance. Free quotes, no commitment.

MO · Verified Contractors

Top Verified Home Addition in Lemay, MO

Ranked by verification strength. State record & coverage status is labeled by source: state database, insurance records, or contractor website.

Midtown Home Improvements
ABP Human VerifiedLicense
ABP Human VerifiedInsurance
4.1 out of 5 stars,4.1· 1,754 Google reviews
36+ Years in Business
BBB Accredited · A+
Wentzville, MO
License confirmed active against state records.
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How We Verify

State contractor record check

Insurance validated

Business history reviewed

Continuously monitored

Verify a license at Missouri Division of Professional Registration →

AboveBoardPros is a matching service. We connect you with independent contractors who passed these checks. We do not perform the work ourselves.

Typical Cost Range

$40,000 to $150,000

Lemay market estimate

Home Addition in Lemay: Frequently Asked Questions

How much does home addition cost in Lemay?

In Lemay, home addition typically ranges from $40,000 to $150,000. Getting three written bids from licensed contractors is the most reliable way to calibrate your specific project.

How long does home addition typically take?

Timeline depends on project scope. Ask for a written schedule before work begins, and specifically ask about material lead times and permit inspection windows: these cause most delays.

Do I need a permit for home addition in Lemay?

Home additions always require a building permit. The permit process covers structural plans, foundation, framing, electrical, and final inspections at multiple stages. No licensed contractor will begin an addition without pulling permits — and unpermitted additions must be disclosed in any home sale.

Are addition contractors in Lemay required to be licensed?

Yes. Lemay enforces active licensure and insurance. Ask any contractor for their license number and verify it at the MO state licensing website before signing a contract.

How do I verify a Home Addition contractor's license in Missouri?

In Missouri, contractor licensing is tracked by the Missouri Division of Professional Registration. You can look up any contractor's license status directly at https://pr.mo.gov/licensee-search.asp. To file a complaint or check for consumer alerts, use the Missouri Attorney General's consumer complaint page at https://app.ago.mo.gov/app/consumercomplaint. AboveBoardPros runs this same check before listing a contractor, then reviews it on an ongoing basis.

How does AboveBoardPros select addition contractors?

Four-point check: active registration confirmed against the MO contractor registry, corporate standing reviewed, insurance validated, business reputation analyzed. We reject roughly 40% of applicants and monitor every listed contractor continuously. Credentials that lapse mean removal.

Home Addition Cost & ROI · Lemay

2025 Cost vs. Value · West North Central market.

Project	Cost	Resale	ROI
Deck Addition \| Wood	$18,263	$17,323	95%
Deck Addition \| Composite	$25,096	$22,199	89%
Bathroom Addition \| Midrange	$60,645	$32,347	53%
Bathroom Addition \| Upscale	$111,255	$40,526	36%
Primary Suite Addition \| Midrange	$170,517	$55,097	32%
Primary Suite Addition \| Upscale	$351,613	$63,136	18%

Nearby areas: St. Louis

St. Louis O'Fallon St. Charles St. Peters Florissant

How to Find the RightHome Addition Pro in Lemay.