A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Room Addition Contractor Across Colleyville
A room addition in Colleyville typically costs between $180 and $420 per square foot for site-built construction, with most projects landing in the $95,000 to $240,000 range depending on scope, finishes, and whether you choose a site-built or modular approach. We serve every corner of Colleyville from our Dallas-Fort Worth metro office, with crews scheduled locally so you’re never waiting on someone unfamiliar with the city’s permit process or HOA landscape. Call (682) 204-9686 to talk through your project and get a written price before any work begins.
We’re Benson ADU Fort Worth, led by Troy Eastman, and we approach room additions in Colleyville differently than the contractors who hand you a verbal estimate and disappear until the framing crew shows up. Our process starts with a written price, a confirmed scope, and a schedule that names the long-lead items before they become surprises. That matters here more than in most cities, and we’ll show you exactly why throughout this page.
Why Benson ADU Fort Worth Is Colleyville’s Preferred Room Addition Contractor Company
Colleyville homeowners tend to research before they commit. They check the city’s zoning pages, they read HOA covenants, and they ask hard questions about pricing. That’s exactly the kind of client we’re built for. Our Room Addition Contractor team puts everything in writing: the price, the scope, and the 365-Day Done Right Promise that says if the work isn’t right within a full year, we make it right. No verbal promises. No phone tag.
Every project gets a background-checked, uniformed crew, and when you call, a live person answers. That’s not a call center in another state. It’s someone who can pull up your project file and give you a straight answer. For Colleyville specifically, that matters when you’re coordinating a job that may involve site plan review with the city, an HOA architectural committee, and a foundation engineer all at once.
We also build with names you can verify independently. Depending on your project, we can source Dvele, Mighty Buildings, Boxabl, or Plant Prefab for modular room addition options, alongside traditional site-built construction with James Hardie cladding. That gives you a genuine choice, not a single take-it-or-leave-it product.
Room Additions in Colleyville
Room Additions in Colleyville mean something specific: you’re adding square footage to a custom-built home on a large lot, and the city is going to want design continuity, proper setbacks, and a foundation that can handle the clay soil. A site-built room addition here typically runs $180 to $320 per square foot for a standard bedroom, office, or guest suite with mid-range finishes, and $350 to $420 per square foot when you’re specifying custom millwork, architectural glass, or premium cladding. The biggest cost driver is usually not the framing; it’s the long-lead finishes and the foundation work. We’ll walk you through both before you sign anything.
Architect and Designer Coordination
Most Colleyville room additions we bid involve an architect or designer who has already produced plans. Some don’t, and that’s fine. We coordinate directly with your design team – or bring in a designer if you need one – so the plan that gets approved by the city is the same plan we price. We’ve seen too many jobs where the builder prices one set of drawings and builds from another. We won’t do that.
Custom Finishes and Millwork
When a Colleyville homeowner wants a room addition to match a home built in the 1990s or 2000s with custom trim profiles and specific brick or stone veneers, the millwork and cladding order is the schedule. We order those items in week one, not after demo. That way the fixed price we quoted holds, and the lead time runs while site prep and foundation work happen, not after.
Modular Home Addition in Colleyville
A Modular Home Addition in Colleyville can shorten your on-site construction window meaningfully, because the modules are built in a controlled factory while your foundation is being poured and inspected. Depending on the zone and your lot size, modular additions here typically run $150 to $280 per square foot installed, with finishes like custom cabinetry and specialty glass pushing the upper end. The catch in Colleyville is not the module itself; it’s the site work, the new utility connections, and the site plan review. We handle all of it, and we price it in writing before the factory order goes in.
Prefab Panels and Factory Built Components
We’re authorized to build with Dvele, Mighty Buildings, Boxabl, and Plant Prefab, which means you can compare panelized and modular systems side by side with site-built. For a Colleyville lot with no alley access and a required new driveway approach, a panelized system sometimes saves weeks because the wall sections arrive ready to stand. We’ll tell you honestly whether modular makes sense for your specific address or whether site-built is the better value.
Foundation Work on Expansive Clay
The expansive clay soils across Colleyville mean any modular addition needs the same level of foundation engineering as a site-built one. We typically specify post-tension slabs or engineered pier systems, depending on the soil report. That’s a line item on your written price, not something we discover mid-project and bill later.
Trusted Brands We Service in Colleyville
When we install or coordinate a modular room addition in Colleyville, the brand matters. We work with Dvele, Mighty Buildings, and Boxabl on a regular basis, and we stock the connection components, flashing, and sealants those systems require so Colleyville customers aren’t waiting on a parts shipment from California or Texas factories mid-project. James Hardie cladding is our default exterior finish for site-built additions because it holds up to the freeze-thaw cycles and summer humidity we get in North Texas. You get to research every brand we name, and we encourage it. The more you know about what goes into your addition, the better the conversation we can have about price and schedule.
Common Room Addition Contractor Problems We See in Colleyville Homes
- Stop-work orders over unapproved driveway approaches. Colleyville has no alleys in most neighborhoods, so a detached addition often needs a new driveway approach from the street. If the HOA’s architectural review wasn’t completed before the pour, the project stops. We verify that requirement before we ever bid the job.
- Foundation cracks from expansive clay soil. The clay under Colleyville expands and contracts with moisture, and a room addition on a standard slab can move if the soil report is ignored. We bring in a foundation engineer on every addition, and the fix is priced in your written estimate, not billed as a surprise change order.
- Long-lead items ordered too late. Custom millwork, euro-style cabinetry, and architectural glass can carry 12 to 16 week lead times. If the builder orders those after demo, your addition sits open to North Texas heat and freezing events for months. We order framing-to-finish materials in week one, after you approve the fixed price.
- Permit timelines that don’t match neighboring cities. Colleyville’s site plan review can stretch past eight weeks, which catches out contractors who assume turnaround mirrors Southlake or Bedford. We schedule around that reality from day one, and your written schedule reflects it.
Pricing for Room Addition Contractor in Colleyville, TX
Here’s what you should expect to budget in Colleyville. A site-built room addition runs about $180 to $320 per square foot for standard finishes, and $350 to $420 per square foot for high-end work with custom cabinetry, architectural glass, and millwork ties. A modular home addition lands between $150 and $280 per square foot installed. A 400-square-foot guest suite with a bathroom typically totals $95,000 to $160,000 here. The factors that move the number are your lot’s soil conditions, whether you need a new driveway approach, and the lead time on your specified finishes. We give you a written line-item price before any ordering happens, and that number doesn’t change unless you change the scope. Call (682) 204-9686 for a free estimate on your specific address.
We Also Serve Cities Near Colleyville
Our crews work throughout the metro, so if you’re searching for a Room Addition Contractor in Colleyville, we can also help neighbors in Bedford, Euless, Southlake, and Haltom City. The same written pricing, the same 365-Day Done Right Promise, and the same local crew standard apply across all of them.
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 Room Addition Contractor in Colleyville
Setbacks in Colleyville are restrictive, and many residential zones require a one-acre minimum lot size, which means a detached room addition often sits farther from the property line than it would in nearby cities. That can actually work in your favor, giving you more usable yard between the addition and the property edge, but it also means the city will scrutinize your site plan closely. We check your specific zoning and setback requirements before we quote, so the written price reflects what the city will actually approve. Call (682) 204-9686 and we’ll review your address.
Yes, in most Colleyville neighborhoods it will, because the city has no alleys in the majority of its residential areas. A detached addition usually triggers a new driveway approach from the street, and that means site plan review through the city and possibly HOA architectural committee approval before you break ground. We handle the paperwork and the coordination, and the driveway approach is a line item on your written price, not a surprise later. Call (682) 204-9686 to get a fixed quote that includes it.
We order custom cabinetry, euro-style millwork, and architectural glass in week one, immediately after you approve the written price. Those items often carry 12 to 16 week lead times, and by ordering them before demo, we make the lead time run concurrently with site prep, foundation work, and framing. Your addition isn’t left open to the elements while the finishes are produced. Call (682) 204-9686 and we’ll map the schedule for your specific finishes.
Yes, Colleyville’s expansive clay soil typically requires a post-tension slab or an engineered pier system rather than a standard slab on grade. The clay expands and contracts with moisture, and an under-engineered foundation will move, crack drywall, and cause doors to bind within the first few seasonal cycles. We include a soil report and a foundation engineer’s design in your written estimate, so that cost is known before you commit. Call (682) 204-9686 for an exact foundation line item on your project.
Yes, in many cases you can, but the HOA’s architectural review committee will need to approve the design, materials, and any new driveway approach before the city will issue permits. The modular systems we work with, including Dvele and Boxabl, are designed to meet strict exterior standards, and we provide spec sheets and renderings directly to your HOA. The earlier we start that review, the sooner your schedule locks in. Call (682) 204-9686 and we’ll help you navigate the HOA packet.
One more thing about how we work in Colleyville. Our crew recently framed a 420-square-foot guest suite addition on a 1.2-acre lot off Bransford Road, where we coordinated with the homeowner’s architect to match the existing brick veneer and 8:12 roof pitch. The custom euro-style cabinetry and 8-foot glass sliders were ordered in week one, and our fixed-price contract locked in the cost before the four-month lead time began. The pour was scheduled only after the foundation engineer addressed the expansive clay soil with a post-tension slab. That’s the process every Colleyville project gets: the price in writing, the long-lead items ordered early, and the foundation engineered for the soil we actually have here. Call (682) 204-9686 to schedule your free estimate, and you’ll see the difference before the first shovel turns.
Written by Troy Eastman, Owner at Benson ADU Fort Worth, serving Colleyville and the surrounding metro.
