Cost Guide
What Does a Home Addition Cost in Central Texas?
When the house is right but the space isn't, an addition beats moving — especially with today's mortgage math. In Central Texas, additions typically run $200–$350 per square foot depending on what the new space contains, with whole projects landing anywhere from $40,000 for a modest bump-out to $300,000+ for a second story.
Additions are structural work: foundations tied to your existing slab, rooflines that have to marry cleanly, and load paths that need an engineer's stamp. That's builder territory — and it's why addition pricing varies more by scope than by finish. Here's how we break it down.
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Cost by Finish Level
| Finish Level | Typical Range | What That Buys |
|---|---|---|
| Bump-Out or Sunroom | $40,000 – $80,000 | Extending a kitchen, dining, or living space 4–12 feet — new foundation section, tie-in roof, windows, and finished interior, no new plumbing. |
| Full Room Addition | $80,000 – $160,000 | A new bedroom, office, or family room — often with a bathroom. Full foundation, framing, roof tie-in, HVAC extension, and finishes matched to the house. |
| Primary Suite / Second Story | $160,000 – $300,000+ | Large-footprint suites or building up instead of out: structural reinforcement, stairs, full bath, closets, and significant roof and HVAC work. |
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Ranges include design coordination, engineering, permits, construction, and matching finishes to the existing home.
Budget Reality
What Drives the Cost Up
What the space contains
A bathroom or kitchenette in the addition adds plumbing, ventilation, and fixtures — the most expensive square feet in any addition.
Foundation and soils
Central Texas clay moves. Proper piers and a tie-in detail that respects the existing slab are non-negotiable, and they're priced up front.
The roofline
A clean roof tie-in is the difference between an addition that looks original and one that looks bolted on. Complex rooflines cost more and are worth it.
Matching the existing house
Brick, stone, siding profiles, and interior trim all have to match. Sourcing and blending materials honestly takes time and budget.
HVAC capacity
Sometimes the existing system can carry the new space; sometimes it can't. We calculate it in design, not after move-in.
Timeline
How Long It Takes
Design, engineering, and permitting typically run 6–10 weeks. Construction runs 8–14 weeks for bump-outs and full rooms, and 16–24 weeks for second stories and large suites. You stay in the house for almost all of it — we close in the new space before we open the wall between old and new.
See where your project lands →FAQ
Questions, Answered
Is it cheaper to add on or move?
Run both numbers. An addition prices at construction cost; moving prices at realtor fees, closing costs, and — for most Central Texas owners — trading a low mortgage rate for today's. When the location works, additions usually win.
Do I need a permit for an addition?
Always — city or county, plus engineered foundation and framing plans. We handle design coordination, engineering, and permitting as part of every addition.
Can you match my existing brick and finishes?
Almost always close enough that visitors can't find the seam. Where an exact brick match no longer exists, we'll show you blending options before anything is ordered.
Will the addition match on the inside too?
Yes — flooring transitions, trim profiles, ceiling heights, and paint are part of the scope. The goal is a house that reads as one build, not two eras.
How do I get a ballpark without a site visit?
The instant estimator covers additions — pick the size and finish level and you'll get a real Central Texas range in about a minute. When you're ready, we'll walk the house and firm it up line by line.
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Ballpark it in 60 seconds with the instant estimator, or have us walk the project — free, no pressure, straight answers.
Related: Home additions · Serving Temple, Belton, Salado, Georgetown · More guides: Kitchen Remodel Cost, Bathroom Remodel Cost, Cost to Build a House, Commercial Build-Out Cost · All cost guides