Home Addition Contractor in Colleyville, TX
Birdseye Construction designs and builds Colleyville 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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Home additions in Colleyville, 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 Colleyville
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 Colleyville before design. |
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 That Match Colleyville Homes
Colleyville’s larger lots make it one of the best addition markets in Tarrant County — room to build out a main-floor suite, a bigger kitchen and dining space, or a full in-law suite without crowding the yard. The finish bar is high here, and that’s the point: materials, rooflines, and proportions are matched to the existing house so the addition reads as original construction.
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 Colleyville — 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 Colleyville remodeling page for whole-house remodeling.
The Colleyville Tree Rule That Decides How Big an Addition Can Be
Colleyville has the most consequential tree ordinance of any city in our service area, and it is written in a way that specifically catches home additions. Under the Land Development Code, homestead property is broadly exempt from urban forestry review — which is why most homeowners here have never dealt with it. But when an addition reaches 50 percent or more of the existing building footprint, the full preservation requirements apply: 50 percent of protected tree canopy outside the building envelope must be preserved, along with 50 percent site canopy coverage. A protected tree is one measuring six inches or more in diameter at breast height, with certain species excluded.
That threshold changes the design conversation. An addition sized at 45 percent of the footprint and one sized at 55 percent are not simply different in cost; they are governed differently. On a wooded Colleyville lot — and many are wooded, because the city has been running urban forestry rules since 1993 — that can be the difference between building where you wanted and redesigning around a canopy you are required to keep. We establish where a project sits relative to that line at concept stage, not after drawings.
Two more Colleyville-specific items shape additions. Impervious coverage is capped by the code, so the addition plus any new patio, walkway or drive is measured against a ceiling rather than assessed individually. And any structure over 500 square feet requires engineered design including a soils report — which most additions comfortably exceed, so budget for the engineering rather than treating it as optional.
Colleyville sits on Woodbine sandy loams with moderate rather than extreme shrink-swell, which is gentler ground than Grapevine to the east. Permits run through the City of Colleyville Building Inspections Department, which states a goal of completing plan review within seven working days excluding the day of submittal.
Frequently Asked Questions
How much does a home addition cost in Colleyville, 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.
Do you build in-law suites in Colleyville?
Yes — in-law and guest suites are one of our most requested Colleyville additions: bedroom, bath, and living space designed for multigenerational living, with zoning confirmed before design begins.
Who pulls the permits for an addition in Colleyville?
We do. Birdseye is registered with the City of Colleyville 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.
What is the 50 percent rule on Colleyville additions?
If an addition reaches half or more of your home’s existing footprint, Colleyville’s urban forestry requirements apply in full even on homestead property — meaning 50 percent of protected canopy outside the building envelope must be preserved and 50 percent site canopy maintained. Below that threshold, homestead property is broadly exempt. It is worth knowing which side of the line your project falls on before design work starts.
Do I need a soils report for an addition in Colleyville?
If the structure exceeds 500 square feet, yes — Colleyville requires engineered design including a soils report above that size, and most additions are larger than that. Smaller accessory structures can follow code minimums. We build the engineering into the quote rather than leaving it as a surprise line item.
Let’s price your Colleyville addition
A free walkthrough and a fixed-price scope for your exact project — no pressure, no guesswork. Headquartered in Roanoke, serving Colleyville, Southlake, Grapevine, Keller, North Richland Hills, Trophy Club, Westlake, Roanoke, Haslet, and North Fort Worth.
Request a Free Estimate Call (817) 800-6920