A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Home Addition Contractor Across Colleyville
A home addition in Colleyville typically costs between $85,000 and $275,000 depending on scope, finishes, and whether you’re building attached or detached. We’re Benson ADU Fort Worth, and we handle the full range: garage additions, bathroom additions, second-story builds, sunrooms, and bump-outs. If you live near Colleyville Boulevard, in the neighborhoods off Pleasant Run Road, or anywhere in the 76034 ZIP, call (682) 204-9686 for a written price before any work starts.
Colleyville isn’t a city where a one-size-fits-all approach works. The lots are large, the homes are custom, and the city’s design standards favor additions that look like they were always there. Our crew knows the difference between what flies in Lexington Place versus what an HOA near McDonwell School Road will reject on first review. That local knowledge saves you months of back-and-forth.
Why Benson ADU Fort Worth Is Colleyville’s Preferred Home Addition Contractor Company
We’re part of the Relay Home Co. family, founded in 2006, and every Colleyville project runs through The Relay Visibility Guarantee. That means a written price before work starts, real-time tracking on your job, and a 365-Day Done Right Promise. If something isn’t right within a year, we make it right, in writing, on every project. No verbal estimates that drift. No scope creep billed after framing begins.
Homeowners in Colleyville keep our number saved because a live person answers every call, 24/7. When you’re coordinating an architect, an HOA architectural review committee, and a site plan permit, you don’t have time for voicemail loops. Our technicians are background-checked and arrive in uniform, so you always know who’s walking onto your property. For high-end additions – the kind Colleyville homeowners actually build – that consistency matters.
Garage Addition Contractors in Colleyville
Garage addition contractors in Colleyville handle everything from a third bay added onto an existing footprint to a fully detached garage with a guest suite above. On these estate lots, a garage addition often doubles as storage for boats, RVs, or collector cars. A standard two-car garage addition in Colleyville runs $65,000 to $120,000. A detached garage with a finished apartment above starts around $150,000 and climbs from there.
What Adds Cost on a Colleyville Garage Build
Clay soil affects slab design. We’ll spec a post-tension or grade-beam foundation rather than a floating slab when soil tests show high movement potential. Brick or stone veneer to match your main house adds $12 to $18 per square foot over hardie plank.
Detached vs. Attached on Estate Lots
If your lot exceeds Colleyville’s 1-acre minimum for many residential zones, a detached garage gives you flex space without touching the existing roofline. Attached garages cost less per square foot, but the connection detail – tie-ins, flashing, and matching the roofline – is where cheap builders go wrong. We won’t.
Bathroom Addition Contractor in Colleyville
A bathroom addition contractor in Colleyville works on everything from a powder room near the media room to a full primary suite bath with a freestanding soaking tub and curbless shower. A standard 5-by-8 bathroom addition in Colleyville runs $45,000 to $75,000. A luxury primary bath with custom millwork, heated floors, and architectural glass starts around $90,000 and can reach $150,000 depending on fixture packages.
Long-Lead Fixtures Drive This Schedule
Custom vanities, specialty tile, and imported fixtures routinely carry 8 to 14 week lead times. We place those orders the same week you sign, because waiting until rough-in is done means a finished bathroom sitting empty for two months.
Wet Wall Placement and the HOA Question
Adding a bathroom on an exterior wall means new supply lines and drain runs through your slab or crawl space. In Colleyville, that triggers a plumbing permit, and depending on your HOA, possibly an architectural review. We handle both so you don’t chase paperwork across two different offices.
Trusted Brands We Service in Colleyville
We’re authorized to build with Mighty Buildings, Boxabl, and Plant Prefab, plus Tuff Shed for detached structures. That gives Colleyville homeowners curated options instead of a single take-it-or-leave-it product. Prefab panels from Mighty Buildings or Boxabl can shave months off a detached ADU schedule because the wall systems arrive pre-insulated and pre-finished. For a classic site-built addition, we source James Hardie cladding and coordinate with your designer on millwork, glass, and specialty finishes. You can research every brand we recommend – they’re names with independent reputations.
Common Home Addition Contractor Problems We See in Colleyville Homes
- HOA architectural review rejection. We see homeowners spend $4,000 to $8,000 on design work only to have the HOA reject the plan for roof pitch, exterior materials, or driveway approach. We verify HOA architectural guidelines before final drawings, not after.
- Clay soil shift cracking the new slab. North Texas expansive clay expands when wet and contracts during dry spells. If your addition’s foundation isn’t engineered for that movement, you’ll see slab cracks or brick veneer separation within the first year. We spec soil testing on every Colleyville addition.
- Long-lead items ordered too late. Custom millwork, specialty glass, and imported tile can take 3 to 4 months. Ordering after framing starts means a finished shell sitting idle. We place purchase orders at contract signing and track them in our real-time job dashboard.
- Driveway approach complications on alley-free lots. Colleyville has no alleys in most neighborhoods, so a detached addition means a new driveway approach from the street. That triggers site plan review and sometimes HOA approval, which can add 60 to 90 days before framing starts. We build that into the schedule from day one, not as a surprise after demo.
Pricing for Home Addition Contractor in Colleyville, TX
A one-room bump-out in Colleyville starts around $55,000. A full bathroom addition runs $45,000 to $75,000. A garage addition with a finished room above ranges from $150,000 to $220,000. A complete second-story addition over an existing single-story home starts around $200,000 and goes up from there, because you’re lifting the roof, reframing the structure below, and typically relocating mechanicals for a few weeks. Detached ADUs built with prefab panels from Mighty Buildings or Boxabl can land between $120,000 and $250,000 depending on size and finish level.
Every price is fixed in writing before we order materials. No change orders because we “didn’t know” the soil was bad or the millwork was backordered. Call (682) 204-9686 for an exact quote – estimates are free and the written line-item price is yours to keep.
We Also Serve Cities Near Colleyville
Our Home Addition Contractor team serves Colleyville and the surrounding DFW suburbs. That includes Colleyville proper, plus Bedford, Euless, Southlake, and Haltom City. If you’re a few minutes outside city limits on a county road, call us anyway – we’ll confirm coverage and get you a written price fast.
Serving Colleyville, TX - Our Local Coverage Area
We’re based in the Colleyville area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Home Addition Contractor in Colleyville
Most Colleyville neighborhoods have no alleys, so a detached ADU requires a new driveway approach from the street. That triggers a site plan review and, in HOA-governed communities, architectural committee approval. The process typically adds 60 to 90 days before framing can begin. The driveway itself costs $8,000 to $25,000 depending on length, materials, and whether you need cast-stone edging to match the main home. Call (682) 204-9686 and we’ll walk you through the site plan process before you spend a dollar on design.
If your property sits in an HOA-governed community, yes – most home additions in Colleyville require an architectural review from your HOA before the city will release permits. HOAs typically review exterior materials, roof pitch, window placement, driveway approach, and whether the addition looks consistent with the neighborhood’s original build. We pull your HOA guidelines before drawings are finalized so you don’t pay a designer twice. Exact review timelines vary by HOA, but plan for 4 to 8 weeks. Call (682) 204-9686 for a free estimate and we’ll handle the HOA paperwork.
Many of Colleyville’s residential zones require a 1-acre minimum lot size for detached units. That’s a higher bar than most DFW suburbs, which is why the city’s ADUs are primarily luxury additions – guest quarters, multigenerational suites, or rental income properties on estate-sized lots. If your lot is under an acre, an attached addition or bump-out is often the more realistic path. We’ll check your specific zoning before you commit to a design. Call (682) 204-9686 for a free lot and zoning review.
Custom cabinetry, millwork, and architectural glass are built to order, not pulled from a warehouse shelf. Lead times run 8 to 16 weeks depending on the shop. If you wait until framing is done to order them, your addition sits finished but empty for months. We place all long-lead orders at contract signing and track them in our real-time job dashboard, so you see exactly when your millwork is scheduled to arrive. Call (682) 204-9686 and we’ll lay out a schedule with every lead time in writing.
We run a soil test on every Colleyville addition before the foundation is designed. North Texas clay expands when wet and shrinks during dry spells, which puts stress on slabs and brick veneer. Depending on the soil report, we’ll spec a post-tension slab, a grade-beam foundation, or deeper piers. That engineering costs $2,500 to $6,000 up front but prevents the cracked slab and separated veneer we see on additions where the builder skipped it. Call (682) 204-9686 for a soil-first quote – estimates are free and the price is fixed in writing.
How Colleyville’s Alley-Free Streets Shape Every Addition
Walk through neighborhoods off McDonwell School Road or near Pleasant Run, and you’ll notice something most visitors don’t: there are no alleys. Colleyville was built around estate lots with street-facing driveways, so when a homeowner wants a detached guest suite or a garage addition with a second-floor apartment, the structure needs its own approach from the curb. That means a new driveway cut across your front or side yard, which triggers site plan review with the city and architectural approval from your HOA. The HOA may require the new driveway’s edging to match the cast-stone or brick border on your main driveway. That’s not a variance you can skip. It’s a design condition, often stated in the HOA’s architectural guidelines, and it adds 6 to 12 weeks before we can even order materials.
Colleyville’s lack of alleys also shapes the placement of new structures. Without rear access, a detached ADU can’t tuck quietly behind the house the way it might in a Dallas alley neighborhood. Everything faces the street, so everything needs to look intentional. That’s why we lean on prefab systems from Mighty Buildings and Boxabl when the design allows – the panelized walls arrive factory-finished, which reduces on-site construction time and gives the HOA a product they can research and approve faster. For site-built work, we coordinate with your architect or designer from the first conversation, because on a custom brick estate, the addition has to read as original, not bolted-on.
On a custom estate near McDonwell School Road, our crew coordinated with the homeowner’s architect on a detached guest suite with a full bath. The HOA required the new driveway approach to match the main home’s cast-stone edging, so we pulled the site plan permit, ordered the stone from a local supplier, and managed the six-week lead time before concrete was poured. The finished addition looked like it had been there since the original build – which is exactly the point.
Clay Soil, Heat, and the Long-Lead Truth About Colleyville Additions
Colleyville sits on expansive clay soil, the same gumbo you’ll find across most of North Texas. It swells in wet springs and shrinks through hot, dry summers. Any addition built without a soil test is a bet against the ground, and the ground usually wins within two or three seasons. We test the soil before we design the foundation, full stop. On a detached garage with an apartment above, that test changes the slab spec; on an attached bathroom addition, it changes how we tie the new slab into the existing foundation so the two don’t move independently and crack at the seam.
The heat matters too. Summers here are long and humid, and a poorly insulated addition becomes a furnace by July. We spec closed-cell spray foam or rigid insulation in Colleyville additions by default, not as an upgrade. The occasional winter freeze is the other threat. Pipes in an addition that sits on an outside wall, or in a detached ADU on its own foundation, need freeze protection. During the 2021 freeze, homes across Colleyville lost plumbing because builders hadn’t insulated chases and sill plates properly. We learned from that, and we build for it.
But the real schedule driver on a high-end Colleyville addition isn’t framing, and it isn’t labor. It’s lead times. Custom millwork from a shop in the Design District can sit 12 weeks out. Architectural glass for a sunroom or a primary bath feature wall can run 14. Imported tile, specialty hardware, custom vanities – all of it ships on someone else’s calendar. Builders who wait until the walls are up to order these items hand you a finished shell and a two-month hole in the schedule. We don’t. The lead times go into your written price and your project timeline before you sign, and we order at contract signing. Labor is easy to schedule. Materials are not. We build the calendar around the materials, not the other way around.
Written by Troy Eastman, Owner at Benson ADU Fort Worth, serving Colleyville since 2006.
