REMODELING & CONSTRUCTION · FORT WORTH & NORTH DFW

Home Addition Contractor in Justin, TX

Design-build remodeling and construction from a local general contractor with 500+ projects since 2009 — fixed price, firm schedule, in-house crews.

Request a Free Estimate Call (817) 800-6920

★★★★★ 4.9-Star Google Reviews
500+ Projects Completed
BBB Accredited
Fully Insured
Fixed-Price Contracts

THE SHORT VERSION

Birdseye Construction builds home additions in Justin, TX — bump-outs, room additions, second stories, primary suites, and in-law suites — under one design-build contract covering design, engineering, permitting, and construction. Most additions in this corridor run $150 to $400 per square foot, priced as a fixed amount before demolition.

Additions in Justin and the 156 corridor

Justin sits on the Highway 156 corridor in Denton County, where newer subdivision homes sit alongside long-held acreage. That mix produces two different kinds of addition work: growing families in 2000s-era homes who need another bedroom, an office, or a primary suite; and acreage owners with room to build out rather than up.

Lot size is the practical advantage here. Where a Fort Worth infill lot forces a second story, most Justin properties have room for a ground-floor addition — which is simpler structurally, faster to build, and usually cheaper per square foot.

What we build

Bump-outs — two to fifteen feet added to a kitchen, bathroom, or bedroom.
Room additions — bedrooms, offices, playrooms, and family rooms on new foundation.
Primary suite additions — bedroom, full bathroom, and walk-in closet as one suite.
In-law suites and casitas — attached or detached independent living space.
Second story additions — where the lot is full or the footprint should not grow.
Garage conversions and bonus room finish-outs — square footage you already own.

Addition costs around Justin

Project	Typical Cost	Typical Timeline
Bump-out addition	$15,000–$50,000	6–12 weeks
Room addition (ground floor)	$60,000–$150,000	14–22 weeks
Primary suite addition	$150,000–$350,000	16–28 weeks
Second story addition	$60,000–$300,000+	20–28 weeks
Detached casita	$150,000–$300,000+	20–32 weeks

Permitting and septic

Inside Justin town limits, additions require building permits with engineered drawings, plus electrical, plumbing, and mechanical permits. On unincorporated Denton County property nearby, requirements are lighter but engineering remains standard practice.

The item that catches people on acreage is septic capacity. Adding bedrooms or bathrooms can require the septic system to be evaluated and sometimes expanded, and that approval is separate from the building permit. It is worth confirming early, because it can change the scope of an otherwise straightforward addition.

How Birdseye works

Design, engineering, permitting, and construction under one fixed-price contract. In-house crews on the core trades. A written scope and one number before demolition, with changes documented and signed before they are built.

Serving Justin, Argyle, Haslet, Northlake, Roanoke, Decatur, Fort Worth, and Keller. Request a free estimate.

Frequently Asked Questions

Do you build home additions in Justin, TX?

Yes. Justin and the Highway 156 corridor are inside our core service area, along with Argyle, Haslet, Northlake, Roanoke, Decatur, and north Fort Worth.

Will an addition affect my septic system?

It can. Adding bedrooms or bathrooms may require the septic system to be evaluated and potentially expanded, and that approval is separate from the building permit. It should be confirmed early, before design is finalized.

Is it cheaper to build out than up in Justin?

Usually, because most lots here have room for a ground-floor addition. Building out avoids removing the existing roof, evaluating and reinforcing the existing foundation and framing, and adding a staircase.

How long does an addition take?

Four to seven months from signed contract to final walkthrough — two to six weeks of design and engineering, three to eight weeks of permitting, and 14 to 28 weeks of construction depending on the addition type.

Do you handle the engineering and permits?

Yes, both are inside the construction contract. We produce the drawings, carry them through plan review, respond to comments, pull the permits, and schedule every inspection.

Let’s price your project

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