Home Additions in Southlake, TX
Southlake room additions: single room $60,000–$110,000, room plus bath $110,000–$190,000, multi-room or second-story $190,000–$300,000+. Permits at cost.
Home additions in Southlake, TX run $60,000 to $300,000. A single room with no plumbing is $60,000 to $110,000. A room plus a bathroom, like a primary suite or an in-law suite, is $110,000 to $190,000. Multi-room, second-story, or kitchen-involved work is $190,000 to $300,000+.
What an addition costs in Southlake
| Scope | Price range | What that usually means |
|---|---|---|
| Single room, no plumbing | $60,000 – $110,000 | Office, playroom, den, extra bedroom, garage conversion |
| Room plus bathroom | $110,000 – $190,000 | Primary suite, in-law suite, guest suite with its own bath |
| Multi-room, second-story, kitchen-involved | $190,000 – $300,000+ | Going up instead of out, or opening the addition into a new kitchen |
Those are the same three tiers we quote across Tarrant County. What changes in Southlake is which tier your project lands in. Garage conversions are priced under these same tiers, and converting an unused third bay usually costs less than framing new structure, since the slab, walls, and roof are already there.
What pushes a Southlake addition into the upper tiers
For a lot of families here, Carroll ISD is part of why they bought in Southlake in the first place. Moving up to a bigger house can mean moving out of the district, so adding on to the house you already own is often the sensible move.
An addition on a house like that rarely stops at the new walls. It has to read as original, and the rooms it touches usually get pulled in with it. Three things drive the number:
- Finish level. Roughly 80% of the countertops we install are quartz. Cabinetry comes from J&K Cabinetry in Dallas, prefab or custom in any species. Delta and Moen fixtures, frameless glass, Schluter waterproofing behind every shower.
- Structure. Tying into a steep roof pitch, moving a load-bearing wall, extending HVAC and electrical across the house, or going up instead of out.
- Exterior match. Brick, stone, windows, and roofline. That is the hard part; more on it below.
Primary suite additions
A primary suite addition is a bedroom, a full bath, and closet space, and it sits in the $110,000 to $190,000 tier because the bathroom brings plumbing, waterproofing, tile, glass, and cabinetry with it. Two things to settle before we price it: what the existing primary becomes once you move out of it, and whether the new suite can sit on a simpler section of roof. A back-of-house addition under a straightforward gable costs less and looks better.
In-law and multigenerational suites
Same tier, different program. Bedroom, full bath, often a sitting area, sometimes a separate entry. Decide early whether it has to function independently, because that changes plumbing runs, electrical, HVAC zoning, and how the HOA and the city read the plans. If you want a kitchenette, say so at the walk-through. A kitchen moves the job into the kitchen-involved tier, and whether a second kitchen or separate entry is allowed at your address is a city question we ask before we quote.
Matching brick and roofline so the addition disappears
This is where an addition either blends into the house or announces itself from the street.
Brick. A brick made fifteen or twenty years ago is often out of production, and even when the name survives the color run has usually drifted. Three honest options: source the closest match and accept a small difference; pull original brick off a low-visibility wall, a garage return or a side wall behind a fence, use that on the new street-facing elevation and put the new brick where nobody looks; or design a deliberate break, a change of plane or a stone element, so the eye reads a design decision instead of a bad match. Mortar color and joint tooling matter as much as the brick.
Roofline. Pitch, ridge height, overhang, and fascia depth all have to carry across. New shingles next to twelve-year-old shingles rarely match, so sometimes the right answer is re-roofing the affected plane or the whole roof. We tell you that before you sign, not after framing.
Windows. Head height, grille pattern, and glass have to match. If the existing windows on that elevation are original and tired, replacing them all at once beats one new window next to eight old ones.
HOA architectural review comes before the city permit
If your neighborhood has an architectural review committee, and many in Southlake do, the order matters. Elevations, material samples, and usually a site plan go to the committee first; the City of Southlake permit comes after. Committees meet on their own calendar, not yours. We build that into the schedule up front instead of discovering it in week two.
On permits: licensed trades pull them, and permits are billed to you at cost. They are not baked into the quote, so you see the real number.
Where this page ends and the bathroom page begins
If the bathroom is part of new square footage, it is priced inside the addition tiers above. If you are redoing a bathroom that already exists in the house as it stands, that is a different job at $25,000 to $45,000, covered on our Southlake bathroom remodeling page. If you are doing both, say so at the first visit, because sequencing them together saves a second mobilization.
How payment works at this size
Between $60,000 and $100,000: 50% down, 30% after four weeks, 20% at completion. Over $100,000: 50% at start, which covers demo, the lumber package, and window ordering, then the remaining 50% in 10% bi-weekly payments, with you holding the final 10% until every scope is finished and you are satisfied. Check, Zelle, bank transfer, and cash are all fine; cards carry a 3% processing fee passed through. Change orders are cost plus 25%, and quotes hold for 30 days.
What we will not guess at
We do not quote a Southlake addition off a phone call. Foundation, framing, where the sewer line runs, what your HOA will accept, and how the new roof ties into the old one all have to be seen. Chris and Xavier walk the house themselves, and you get a real number after that, not a range dressed up as a bid. Same with schedule: you get a build calendar once we know the scope and the review process at your address.
Salvation Home Remodeling is a Fort Worth & Aledo city-registered building contractor (#RB026782 / #25-000007), insured, with general liability at $1M per occurrence and $2M aggregate and a certificate on request. Our own in-house crew does the work and licensed trades pull the permits. Every job carries a written warranty with two terms: three years covering everything we touch on the job, and five years on our workmanship. Manufacturer warranties on materials pass through to you. We are rated 5.0 on Google across 120+ reviews. Serving Fort Worth since 2001; Salvation Home Remodeling LLC established 2017.
Talk to Chris and Xavier
Call 817-210-7117 or email s.h.r.tarrant@gmail.com to set up a walk-through. We work about a 45-minute radius out of Fort Worth and look at anything past that case by case; Southlake sits well inside it. For the wider picture, our main home additions page covers the build process and photos of completed work.