Do I need a permit for a home addition in Houston?

Yes -- all home additions in Houston require a building permit. Houston Build Crew handles all permit applications, inspections, and code compliance as part of every project. No extra permit fees charged to you.

Home Addition Houston TX

Q: How much does a home addition cost in Houston TX?

Home additions in Houston typically cost $150-$300 per square foot. A 400 sq ft master suite addition runs $60,000-$120,000. A 500 sq ft garage conversion costs $30,000-$60,000. Second story additions average $100,000-$200,000+ depending on size and complexity.

Q: How long does a home addition take in Houston?

A standard room addition takes 8-14 weeks from permit approval to completion. Second story additions take 14-22 weeks. Garage conversions and ADUs typically take 6-10 weeks.

Last updated: May 2026 — Information current as of this date

Room additions, second story additions, garage conversions, and ADUs. Houston's licensed general contractor since 2010. Free estimates.

Free Estimate: (281) 905-2414

Types of Home Additions We Build in Houston

Houston homeowners choose additions over moving because it's often 30-50% cheaper than buying up. We handle every type of addition from permit to final walkthrough.

Master Suite Addition

Add a primary bedroom with en-suite bath, walk-in closet, and sitting area. Most popular addition in Houston. Typical size: 400-600 sq ft.

Second Story Addition

Double your square footage without losing yard space. We engineer the foundation, frame the floor system, and tie into existing rooflines seamlessly.

Garage Conversion / ADU

Convert an attached or detached garage into living space or an accessory dwelling unit (ADU). Great for in-laws, rental income, or home office.

Sunroom / Bonus Room

Enclosed sunrooms, game rooms, or flex spaces off the back of your home. Can be climate-controlled or three-season depending on budget.

In-Law Suite

Semi-private attached suite with bedroom, bath, and kitchenette. Increasingly popular in Houston's multigenerational households.

Bump-Out Addition

Extend an existing room by 4-10 feet. Great for expanding a small kitchen, adding a breakfast nook, or enlarging a living room.

Home Addition Cost in Houston TX -- 2026

Bump-out addition (100-200 sq ft)$25,000 -- $50,000

Garage conversion to living space$30,000 -- $60,000

Master suite addition (400-500 sq ft)$65,000 -- $120,000

In-law suite with kitchenette$80,000 -- $140,000

Second story addition$100,000 -- $220,000+

Costs depend on size, finish level, foundation requirements, and current lumber/material prices. All estimates include design, permits, and full build-out.

Frequently Asked Questions

How much does a home addition cost in Houston TX?

Plan for $150-$300 per square foot for a quality home addition in Houston. A 500 sq ft master suite addition typically runs $75,000-$150,000 fully finished. Garage conversions are lower at $50-$90/sq ft. Call (281) 905-2414 for a free in-home estimate.

Do I need to move out during a home addition?

Most homeowners stay in place during additions. We seal off the construction area from your living space, protect floors and HVAC ducts, and maintain access to all essential areas. Second story additions may require a short temporary relocation during roof framing.

How long does a home addition take in Houston?

Room additions: 8-14 weeks after permit approval. Garage conversions: 6-10 weeks. Second story: 14-22 weeks. We provide a written schedule and stick to it.

Will a home addition increase my property value in Houston?

Yes. In the Houston metro, additions typically recover 60-80% of cost at resale, and significantly improve your home's days-on-market. Master suites and ADUs offer the best ROI in the current Houston market.

Free In-Home Estimate -- Houston Home Additions

Call or text (281) 905-2414. We'll visit your home, discuss your goals, and deliver a detailed written proposal in 48 hours.

Call (281) 905-2414