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 Four Corners
Adding square footage to your Four Corners home works differently than it does in a typical subdivision. Most of our clients here own acreage, which means Fort Bend County handles permits, not a city building department, and septic systems often decide where a new addition can go. That lot you have on Mason Road or off Harlem Road gives you room to build, but it also brings grading, drainage, and utility questions that a cookie-cutter addition contractor won’t ask. Sutton ADU Houston has been building additions and detached ADUs since 2006, and we coordinate county paperwork, septic setbacks, and equipment access before we ever quote a price. Call (940) 242-3207 for a free estimate with a written price delivered before any work starts.
Why Sutton ADU Houston Is Four Corners’s Preferred Home Addition Contractor Company
Four Corners homeowners tend to do their research before letting a construction crew onto their property, and that’s exactly the conversation we like to have. Every technician we send is background-checked, identity-verified, uniformed, and photo-badged under the Threshold Verified standard. Before our crew arrives, you get a name and a photo so you know who’s walking up your driveway. That matters on a five-acre lot with no neighbors in sight.
We work regularly across Four Corners, including the older ranch-style neighborhoods along FM 1093 and the newer custom builds spreading toward the Brazos River. Our crews haul materials from our Houston yard, which means we plan access routes before framing starts. On acreage, that forethought prevents a concrete truck sinking into soft ground after a rain. Miles Hartwell, who leads our team, insists on that level of planning because open-lot grading failures are some of the most expensive mistakes we’re asked to fix.
Our Home Addition Contractor team carries the 365-Day Done Right Promise on every project. It’s a written guarantee covering workmanship for one full calendar year from completion. If something isn’t right, we make it right, and a second visit is free. No haggling.
Bedroom Addition Contractor in Four Corners
A bedroom addition contractor in Four Corners typically tackles homes that were built when three bedrooms was plenty and now need a fourth for aging parents or a growing family. On the ranch-style houses that dominate this area, a standard 12-by-14 bedroom addition with a closet and proper insulation runs $65,000 to $115,000 depending on whether you’re tying into existing HVAC or adding a mini-split. If the addition includes a small bath, expect $95,000 to $160,000.
Septic Setbacks Before the Slab
Before we pour any concrete on a Four Corners acreage lot, we check the septic drain field location against Fort Bend County records. County health department rules dictate how far a bedroom addition must sit from leach lines, and missing that setback can trigger a violation that requires relocating part of the system. We verify this before quoting so the price you see is the price you pay.
Grading and Drainage on Open Lots
A bedroom addition on acreage needs a pad graded to slope away from the foundation. Four Corners soil is heavy clay that expands when wet and shrinks in dry spells, so we compact the base properly and often run a French drain along the new foundation edge. That keeps moisture out of your new bedroom’s floor framing during the Gulf Coast’s heavy rain seasons.
Sunroom Addition in Four Corners
A sunroom addition in Four Corners has to solve a humidity problem before it solves a comfort problem. Stick-framed sunrooms with standard batt insulation and a single window unit turn into mold boxes by August. Our sunrooms use sealed attic space, low-E glass that rejects Gulf Coast sun, and a dedicated mini-split or tie-in to a high-efficiency HVAC system. A 12-by-16 sunroom with these upgrades runs $55,000 to $95,000 in the Four Corners market.
Permitting Through Fort Bend County
Because Four Corners has no city building department, sunroom permits go through Fort Bend County, and there are no city-level inspections. That can speed up approvals, but it also means the builder is the one enforcing code on electrical, glazing, and structural tie-ins. We self-enforce because our 365-Day Done Right Promise depends on the work actually being right.
Wind-Rated Glazing for Hurricane Season
Four Corners sits far enough inland that storm surge isn’t the concern, but wind-driven debris still is during hurricane season. We specify impact-rated or wind-rated glazing on sunroom windows and doors, which adds roughly $8 to $15 per square foot. It’s the difference between a sunroom that survives a September storm and one that needs a full reglaze.
Trusted Brands We Service in Four Corners
When a Four Corners homeowner wants a prefab or panelized option instead of traditional stick framing, we work with Mighty Buildings, Plant Prefab, and Boxabl. These systems arrive as engineered panels or modules, which cuts on-site framing time significantly, and we handle the foundation, utility tie-ins, and finish work. For backyard structures that become studios or workshops, we also frame Tuff Shed conversions with insulation, electrical, and HVAC. If you’re comparing a prefab quote against a site-built addition, we’ll walk you through the real cost differences on your specific lot, including crane access and crane fees if the modules can’t be set by forklift. Call (940) 242-3207 and we’ll talk through which product line fits your budget and your property’s access constraints.
Common Home Addition Contractor Problems We See in Four Corners Homes
- Concrete poured before checking septic setbacks. On acreage lots with leach fields and drain lines running toward the back pasture, a slab poured 15 feet from a drain field can trigger a Fort Bend County violation. Relocating a septic line costs $8,000 to $25,000, which is why we pull county records first.
- Equipment getting stuck on soft ground after rain. Four Corners clay turns to gumbo after a heavy downpour. Concrete trucks and framing crews need a stable path, a temporary gravel drive, or a planned dry-weather window. We schedule pours around the forecast and check the access route the week before.
- Undersized HVAC that can’t handle Gulf Coast humidity. A bedroom addition with a single window unit will hit 80 percent indoor humidity in July. The drywall will sweat, the trim will warp, and mold follows. We size the system for the room’s load and seal the attic so the conditioned air stays where it belongs.
- No flood vents on a slab addition even though drainage is poor. Even if your lot isn’t in a mapped FEMA flood zone, a low-lying section of Four Corners can hold water after sustained rain. Flood vents and elevated or properly graded foundations protect the addition from the kind of sheet flow that follows a tropical storm.
Pricing for Home Addition Contractor in Four Corners, TX
Here’s what we quote in Four Corners, based on recent projects in the area.
- Bedroom addition (12×14, tied into existing HVAC): $65,000 – $115,000
- Bedroom plus bath addition: $95,000 – $160,000
- Sunroom addition (12×16, sealed attic, high-efficiency HVAC): $55,000 – $95,000
- Detached ADU (750 – 1,000 sq ft, septic-compliant, full kitchen and bath): $180,000 – $320,000
- Grading, drainage, and access prep on raw acreage lots: $6,000 – $22,000 depending on site conditions
Three things move the price most in Four Corners: septic setbacks, equipment access, and whether the lot needs grading before a foundation goes in. A flat, cleared lot with an existing driveway keeps costs low. A long lot with no access path and a drain field in the middle will add grading, temporary roadwork, and sometimes a septic variance. We scope all of that before quoting, so your written price includes it. Estimates are free. Call (940) 242-3207.
We Also Serve Cities Near Four Corners
If you’re just outside Four Corners proper, we also work in Houston, The Woodlands, Pearland, and Humble. A lot of our acreage work takes us across the Fort Bend and Harris County line, and the same Threshold Verified crew standards apply on every job. For a look at what we do across the region, see our Home Addition Contractor in Four Corners service area page.
Serving Four Corners, TX - Our Local Coverage Area
We’re based in the Four Corners 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 Four Corners
We pull the septic records from Fort Bend County before we design anything. The county health department sets minimum distances between a bedroom addition and the drain field, and we set the foundation to meet or exceed that setback. On a recent project off Harlem Road, we verified the drain field location and set the ADU foundation 40 feet from the existing leach lines. If your system is older and can’t handle another bedroom, we’ll tell you that before you spend a dollar on design. Call (940) 242-3207 to talk through your lot.
Yes. Sunroom additions in Four Corners require a Fort Bend County permit, and because there’s no city-level inspections, the contractor is responsible for meeting code on electrical, glazing, and structural connections. Sutton ADU Houston handles the county paperwork, and our work is built to pass a third-party inspection even though one isn’t required. That’s what the 365-Day Done Right Promise is built on.
Usually yes, but it depends on your septic tank’s size and the drain field’s remaining capacity. A standard three-bedroom system often won’t handle a fourth bedroom’s expected wastewater load without a tank upgrade. We coordinate with Fort Bend County’s health department to confirm capacity, and if a larger tank is needed, we include that cost in the written quote up front. Call (940) 242-3207 for a free estimate that accounts for your existing system.
We build a temporary gravel access path wide enough for a concrete truck, and we schedule pours when the ground is dry. On one Four Corners project on a two-acre lot, we hauled materials 18 miles from our Houston yard and used a temporary gravel drive because the site had no paved access at all. That access work becomes a line item in your written quote, not a surprise invoice after the fact.
Not always, but we recommend flood vents on any slab addition in a low-lying section of Four Corners because sheet flow after tropical storms is common even outside mapped zones. Elevated foundations also help with the heavy clay soil’s shrink-swell cycle. We’ll look at your lot’s drainage patterns and tell you what’s actually needed, not what’s cheapest to build.
Written by Miles Hartwell, Owner at Sutton ADU Houston, serving Four Corners since 2006.
