Room Additions in San Antonio
C.S.W. Power Solutions builds seamless room additions across San Antonio — bedrooms, master suites, sunrooms, in-law suites, and second-story additions. In-house licensed electricians, plumbers, and HVAC technicians ensure your addition matches your existing home from foundation to roofline.
Room Addition Services in San Antonio
C.S.W. Power Solutions builds all types of room additions for San Antonio homeowners. Whether you need an extra bedroom, a master suite, a sunroom, or a full in-law suite, our licensed team handles every aspect — from foundation and framing to electrical, plumbing, HVAC, and all finish work. We match the addition to your existing home's architecture so it looks like it was always part of the original construction.
- Bedroom additions with closets, lighting, and HVAC
- Master suite additions with walk-in closet and luxury bathroom
- Sunroom and enclosed patio additions
- In-law suite additions with kitchenette and bathroom
- Home office and study additions
- Second-story additions (with structural engineering)
- Bump-out additions to expand existing rooms
- Foundation engineering and construction
- Roofline matching and exterior finish coordination
- All electrical, plumbing, and HVAC by in-house licensed trades
Room Addition Cost in San Antonio
Room addition costs depend on the size, type, and complexity of the addition. Below are typical price ranges for San Antonio room additions in 2025-2026.
Bedroom Addition
$30,000 – $60,000
- 200–300 sq ft
- Foundation & framing
- Electrical & HVAC
- Matching exterior
- 6–10 weeks
Master Suite
$60,000 – $120,000
- 300–500 sq ft
- Full bathroom & walk-in closet
- Premium finishes
- All trades included
- 10–16 weeks
In-Law Suite / ADU
$80,000 – $150,000+
- 400–600 sq ft
- Bathroom + kitchenette
- Separate entrance option
- Full code compliance
- 12–20 weeks
* Prices are estimates based on typical San Antonio projects. Actual costs vary based on size, materials, soil conditions, and scope. Contact us for a free, detailed estimate.
Why San Antonio Homeowners Choose C.S.W. for Room Additions
Room additions require coordination between multiple trades — foundation, framing, roofing, electrical, plumbing, HVAC, and finishing. Most contractors subcontract three or more of these trades. C.S.W. Power Solutions has electrical, plumbing, and HVAC licensed and in-house, which means fewer delays, lower costs, and one company accountable for the entire project.
- Licensed general contractor — one company manages your entire room addition
- In-house licensed electricians (TECL 31793) for all wiring, circuits, and lighting
- In-house licensed plumbers (RMP 37882) for bathroom and wet bar plumbing
- In-house HVAC technicians (TACLA 26479R) for ductwork and zone additions
- Structural engineering coordination for foundation and framing
- Exterior matching — roofline, siding, windows, and trim
- Detailed, itemized estimates with labor and material breakdowns
- Veteran-owned and operated since 2016
Our Room Addition Process
Design Consultation
We visit your home, discuss your needs, take measurements, and evaluate structural and site conditions. You receive a preliminary floor plan and scope of work.
Engineering & Estimate
We coordinate structural engineering, produce a detailed estimate with line-by-line costs for foundation, framing, electrical, plumbing, HVAC, and finishes.
Permits & Construction
We pull all required permits, pour the foundation, frame the addition, install the roof, and build out the interior with our in-house licensed trades.
Final Walkthrough
We walk through the completed addition together, verify all systems, address any punch list items, and ensure the addition seamlessly matches your existing home.
In-House Licensed Trades
Every project by C.S.W. Power Solutions benefits from our in-house licensed trades. Our electricians handle new circuits, lighting, and outlets. Our plumbers manage water lines, drain lines, and gas connections. Our HVAC technicians modify ductwork and install new zones. Need a generator or EV charger as part of your project? We handle that too — all under one contract.
What Our Customers Say
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Room Addition Service Areas
C.S.W. Power Solutions provides remodeling and construction services throughout San Antonio and surrounding communities including Alamo Ranch, Boerne, Castle Hills, Cibolo, Converse, Helotes, Leon Valley, Live Oak, New Braunfels, Schertz, Shavano Park, Stone Oak, and Universal City.
Room Addition FAQ
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