Need more room? Cuadrilla matches you with Houston’s top addition contractors for room additions, second stories, sunrooms, ADUs, and in-law suites.
Tell us about the type, size, and purpose of your addition along with your budget range.
Receive a detailed per-sqft and total cost estimate based on real Houston addition data.
Review profiles, portfolios, and engineering capabilities of 2–3 vetted addition specialists.
Track your multi-month project with phase-by-phase updates, inspection status, and photo logs.
Home addition costs depend on size, complexity, foundation type, and finish level. Here are current Houston-area price ranges.
| Component | Budget Range | % of Total | Notes |
|---|---|---|---|
| Foundation | $5,000 – $30,000 | 12–15% | Pier & beam vs. slab affects cost |
| Framing & Structure | $8,000 – $40,000 | 15–20% | Second story needs more engineering |
| Roofing & Exterior | $5,000 – $25,000 | 10–15% | Matching existing roof is critical |
| HVAC | $3,000 – $15,000 | 8–12% | Dedicated system or zone extension |
| Plumbing | $2,000 – $12,000 | 5–10% | Only if bathroom/kitchen included |
| Electrical | $2,000 – $10,000 | 5–8% | New sub-panel often needed |
| Interior Finishes | $5,000 – $35,000 | 15–20% | Flooring, paint, trim, fixtures |
| Labor & Overhead | $10,000 – $50,000 | 20–25% | Includes project management |
From a small bump-out to a full second story, Cuadrilla connects you with Houston contractors experienced in every type of addition.
Add a bedroom, living room, dining room, or multi-purpose space with seamless integration into your existing home.
Double your living space by adding a full or partial second story with structural engineering and reinforcement.
Three-season or four-season sunrooms with large windows, climate control, and indoor-outdoor living.
Self-contained living spaces with bedroom, bathroom, kitchenette, and private entrance for family members.
Convert your garage into living space with proper insulation, drywall, flooring, and climate control.
Expand an existing room by 50–200 square feet without a full addition — perfect for kitchens and bathrooms.
Custom master bedroom and bathroom additions with walk-in closets, spa-like baths, and premium finishes.
Dedicated home office space with proper lighting, electrical, soundproofing, and data connectivity.
Accessory dwelling units for guests, rental income, or multi-generational living with full utilities and finishes.
Home additions require multiple permits and inspections. This is the most permit-intensive residential project type.
Required for all home additions in Houston. Includes structural, architectural, and site plan review.
Separate permit for new foundation work with soil testing and engineering documentation required.
Required when the addition includes bathrooms, kitchens, or any plumbing fixtures.
New electrical systems, sub-panels, and circuits require separate electrical permits.
Your addition must comply with local setback, lot coverage, and height requirements.
Home additions require the most complex permitting. Our platform and contractors handle every filing, inspection, and compliance requirement.
Share your addition plans with Cuadrilla’s AI estimator
We identify all required permits, engineering, and zoning compliance
Your contractor prepares architectural and engineering plans
Applications are filed with the City of Houston or your municipality
Inspections are scheduled at foundation, framing, and final phases
Certificate of occupancy issued upon completion
Home additions are the longest residential projects. A mid-range addition in Houston takes 3–6 months.
Architectural plans, engineering, permit filings, and material selections.
Pour foundation, frame walls and roof, install windows and doors.
HVAC, plumbing, electrical rough-in, insulation, and drywall.
Flooring, paint, trim, fixtures, cabinetry, and appliance installation.
City inspections, punch list, landscaping, and certificate of occupancy.
Bump-outs can be completed in 6–8 weeks. Second story additions and ADUs may take 5–7 months.
These are the most requested home additions in the Houston market right now.
Accessory dwelling units for rental income or multi-generational living are surging as Houston loosens ADU regulations.
Dedicated, soundproofed home office spaces with proper electrical and connectivity remain in high demand post-pandemic.
Adding or enlarging master suites with spa-like bathrooms and oversized walk-in closets.
Additions with large sliding glass walls that open to covered patios create the indoor-outdoor flow Houston loves.
With Houston lot sizes limited, going up is often more practical and cost-effective than going out.
In-law suites with private entrances, kitchenettes, and ADA-ready bathrooms for aging parents.
Cuadrilla serves homeowners throughout the Houston metro. Our pre-vetted crew network is distributed across the region so you get local expertise.
All inner-loop & outer-loop neighborhoods
Master-planned community specialists
Cinco Ranch, Firethorne, LaCenterra
First Colony, Greatwood, Riverstone
Shadow Creek Ranch, Silverlake
Bridgeland, Towne Lake, Saddle Creek
Quality renovations at realistic pricing
Conroe, Spring, League City, Missouri City
Major additions require significant planning. Use this checklist to get started.
Cuadrilla walks you through all of this as part of the estimating and planning process.
We match your addition project with contractors who have proven experience in your specific type and size of addition.
Detailed per-sqft and total cost estimates before you commit — no hidden fees or surprise overruns.
Every addition contractor is licensed, insured, bonded, and experienced with Houston permitting.
Multi-month projects need great tracking — follow every phase with milestone updates and photos.
Our guarantee covers the full addition — from foundation to final finishes.
Our contractors know Houston soil conditions, flood zones, zoning rules, and building codes.
“Cuadrilla matched us with a contractor who built a beautiful 400-sqft master suite addition. It blends seamlessly with our existing home. The permitting process was handled entirely by the contractor.”
Laura & Greg W.
The Woodlands, TX
“We added a second story to our ranch home in Memorial. Cuadrilla’s contractor managed the structural engineering, permits, and a 5-month build timeline. The result exceeded our expectations.”
Christopher S.
Memorial, TX
“Our detached ADU is generating $1,800/month in rental income. Cuadrilla made the process manageable from permits to final inspection. Best investment we have made in our home.”
Nancy & Tony P.
Katy, TX