HOME ADDITIONS · SOUTHLAKE, TX

Home Addition Contractor in Southlake, TX

Birdseye Construction designs and builds Southlake home additions — main-floor additions, second stories, and in-law suites, all at a fixed price with engineering-stamped plans behind every permit.

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Fixed-Price Contracts

THE SHORT VERSION

Home additions in Southlake, TX run $185–$400+ per square foot — main-floor additions, second-story additions, and in-law suites — with smaller projects at the higher end because engineering, roof work, and tie-ins are fixed costs. Birdseye Construction designs and builds them on a fixed-price contract, with a structural engineer’s evaluation up front and permits pulled for you.

What a Home Addition Costs in Southlake

We publish real numbers because guessing helps no one. Every addition is priced as a fixed-price contract — the number you sign is the number you pay, with any change you request handled through a documented, signed change order.

Addition Type	Typical Cost	What to Know
Main-floor addition	$185–$400+ per sq ft	Bedrooms, family rooms, kitchen and dining expansions — built on an engineered foundation tied into the existing structure.
Second-story addition	upper end of range	Adds space without losing yard — requires a structural evaluation of the existing foundation and framing first.
In-law / guest suite	$185–$400+ per sq ft	Bedroom, bath, and living space for multigenerational living — zoning confirmed with the City of Southlake before design.

Why smaller additions cost more per square foot: engineering, roof tie-ins, and stairs are fixed costs whatever the size — larger footprints dilute them. The National Association of Home Builders puts home additions at roughly 65–75% of cost recouped at resale.

Built on Engineering, Not Guesswork

Every Birdseye addition starts with a structural engineer’s evaluation of your foundation and framing, and every permit is backed by engineering-stamped plans — with North Texas soil conditions accounted for from the foundation up. You don’t need to hire an architect separately: design happens in-house, so design, engineering, and construction stay under one contract and one fixed price.

Additions Built to Southlake’s Standard

Southlake homes set a high bar, and additions here have to meet it — from a second-story addition where lot coverage limits building out, to main-floor suites and the outdoor living spaces this town is known for. Materials, rooflines, and proportions are matched to the existing house so the finished addition reads as original construction, not an afterthought.

How the Process Works

An initial consultation at your home — a structural evaluation and fixed-price quote — the in-house design phase with every material selected and approved — permits pulled by us through the City of Southlake — then construction, with city inspections passed at every required stage and a final walkthrough before we call it done.

See our main floor and 2nd story additions page for the full service and portfolio, or our Southlake remodeling page for whole-house remodeling.

Frequently Asked Questions

How much does a home addition cost in Southlake, TX?

Home additions run $185–$400+ per square foot — smaller projects sit at the higher end because engineering, roof work, and stairs are fixed costs. Every Birdseye addition is quoted as a fixed price before work begins.

Can you add a second story to my house?

Usually, yes — it starts with a structural engineer’s evaluation of your foundation and framing. If the structure supports it, a second-story addition adds space without losing any yard, with engineering-stamped plans behind the permit.

Can you build an addition with outdoor living space?

Yes — pairing an addition with a covered patio or outdoor kitchen is a popular Southlake project: one design, one permit package, one fixed price for the whole scope.

Who pulls the permits for an addition in Southlake?

We do. Birdseye is registered with the City of Southlake and provides the city its list of licensed trades before work is released for construction.

Should I build an addition or move to a bigger house?

Homes are priced by the square foot — if you love your neighborhood, building onto what you own usually wins: no commissions, no moving costs, and you keep your mortgage rate while every dollar becomes space you designed.

Let’s price your Southlake addition

A free walkthrough and a fixed-price scope for your exact project — no pressure, no guesswork. Headquartered in Roanoke, serving Southlake, Grapevine, Colleyville, Keller, Westlake, Trophy Club, North Richland Hills, Roanoke, Haslet, and North Fort Worth.