A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Keller
If you’re weighing a detached ADU in Keller, the realistic price for a turnkey build runs $180,000 to $320,000 for a one-bedroom or studio unit, before site work. A JADU carved out of existing square footage typically lands between $80,000 and $150,000. We’ll walk you through the Keller-specific approval path first, because here that’s the part that sinks timelines, and we’d rather tell you that now than hand you a surprise later. Call (682) 255-2399 to talk it through.
We’re Sutton ADU Fort Worth, the ADU-specialist member of the Threshold Group family, founded in 2006. Miles Hartwell leads our team, and he’ll be the name on your written price before anything gets built. We serve Keller from the Dallas-Fort Worth metro office, with crews who work these streets weekly. That means we know what the Keller planning department asks for, and just as importantly, what your HOA’s architectural review committee will reject.
Why Sutton ADU Fort Worth Is Keller’s Preferred ADU Builders Company
Keller homeowners face a two-gate approval process that most builders in the metro don’t fully prepare for. The city has its own rules, then your HOA has a second set that can veto a city-approved plan. We file both, in the right order, with the right drawings. That sequence matters more than almost anything else on the calendar.
Every Sutton project starts with a written price before work begins. Not a range that drifts, not a verbal ballpark. A line-item number, signed, that doesn’t change unless you change the scope first. That’s the Threshold Standard. It also means the 365-Day Done Right Promise: if any defect in our workmanship shows up within one full calendar year of completion, we make it right at no charge. No haggling, no prorating, no fine print.
And every person who steps onto your Keller property has been background-checked and identity-verified. Before a crew arrives, you get their names and photos. At the door, they show a photo ID badge and wear a clean, marked uniform. That’s not a courtesy, it’s a stated policy, and it’s the reason a lot of parents, older homeowners, and people who work from home choose us to open their gate.
JADU in Keller
A JADU in Keller is a junior accessory dwelling unit, typically a bedroom converted from existing floor area with its own kitchenette and entrance, but it must stay attached to the main house and often under 500 square feet. For Keller homeowners, the JADU question usually comes down to this: does your HOA’s deed restrictions prohibit a second kitchen? Because many do, even when the city’s code allows it. We check that deed language before you spend a dime on plans and permits. A JADU here typically runs $80,000 to $150,000, depending on whether we’re reworking plumbing and adding an exterior door or fitting out a space that already has rough plumbing nearby.
When the Second Kitchen Is the Problem
Lots of Keller HOAs, particularly in the master-planned neighborhoods, write “no second kitchen” into their deed restrictions. That single clause kills more JADUs than any city rule. We review the CC&Rs before we draw plans, so you don’t end up with a city-approved permit and a unit your HOA will fine you for. Sometimes the fix is a kitchenette with no range and a smaller sink; sometimes the HOA won’t allow even that, and we’ll tell you honestly which one you’re dealing with.
What JADU Work Actually Involves
A JADU job usually includes framing or reframing a wall for the new entrance, adding a compact kitchenette with a sink, running a dedicated electrical circuit, and sometimes extending the HVAC to handle the new conditioned space. In a 1980s or 1990s Keller home, we’re often dealing with a slab-on-grade floor, which means plumbing lines run through the slab rather than a crawl space, so trenching and patching concrete is part of the job. We’ll give you a written scope that spells out the slab work separately, so the number you see is the number you pay.
ADU Plans in Keller
ADU Plans in Keller are the permit drawing set and HOA submittal packet that get your detached unit legally buildable, and getting them right the first time matters more here than in any neighboring city. The city plan review checks setbacks, height, and foundation design, while the HOA review checks color, materials, roof pitch, and sometimes even the number of exterior fixtures. Both reviews run in parallel, but the HOA usually meets monthly, so a plan that misses a committee deadline adds four to six weeks, not days. Sutton prepares the full set, including the clay-soil foundation letter that Keller requires for detached structures. Plan sets for a Keller ADU typically land in the $4,000 to $8,000 range depending on site complexity and what the HOA demands, and that includes resubmittal if the committee kicks back a finish choice.
The Clay Soil Foundation Letter
Keller sits on expansive clay, which swells and shrinks with the seasons. The city won’t issue a permit for a detached ADU without a foundation design that accounts for it. That letter, from a licensed engineer, describes how the slab or pier system handles soil movement. We coordinate that before we submit, because without it the city kicks the plan back and you lose two to three weeks you’ll never get back in the construction calendar.
What the HOA Packet Needs
A complete Keller HOA submittal includes exterior elevation drawings, a materials board with actual samples, roof pitch in the drawing title block, and sometimes a landscape plan showing what the ADU footprint does to drainage. We assemble all of it. But here’s the Keller-specific part: we don’t start foundation work until the HOA’s architectural review committee signs off. That’s a scheduling discipline that saves you from a poured slab with the wrong siding color and a stop-work order.
Trusted Brands We Service in Keller
We work with recognized ADU product lines like Dvele, Mighty Buildings, and Boxabl, and we pair them with James Hardie exterior systems when the HOA calls for fiber cement. Keller HOAs often specify HardiePlank lap siding and a particular color palette, so we stock local finish samples and coordinate directly with the brand’s customer support to get the approvals your committee wants to see. Prefab and modular units move faster on-site, but they still need a compliant foundation and utility trenching here, which we handle under the same written price and 365-Day Promise.
Common ADU Builders Problems We See in Keller Homes
- Foundation work started before HOA approval. This is the most expensive mistake in Keller. A crew pours the slab, the HOA rejects the siding color or roof style at the monthly meeting, and the project stalls mid-frame with a foundation already in the ground. We sequence foundation work after the review committee signs, every time.
- City submittal missing the clay-soil foundation letter. Keller’s planning department will simply return the plan unreviewed if the geotechnical letter isn’t attached. That costs weeks, not days. We include it in the first submittal, engineered for the actual soil on your lot.
- JADU built against a forbidden second kitchen. The city may allow a JADU, but the HOA’s deed restriction on a second kitchen makes it unpermittable under the HOA’s rules. We read the CC&Rs before drawing anything, so you know on day one whether a JADU is even viable.
- Exterior finishes that violate the HOA’s material schedule. Keller HOAs are specific: HardiePlank in a given tone, a 6:12 hip roof, no aluminum windows on the street-facing elevation. We specify to the committee’s published standards, so your submittal gets approved on the first or second meeting, not the fourth.
Pricing for ADU Builders in Keller, TX
A detached ADU in Keller runs $180,000 to $320,000 for a studio or one-bedroom unit before site work, with most falling in the $220,000 to $280,000 range when we’re using a mid-grade finish package and a concrete slab. A JADU inside existing space lands between $80,000 and $150,000. Site work is separate and quoted after a lot visit, because a Keller lot with heavy clay or a tight drainage pattern costs more to prep than a flat, sandy lot in another part of the metro. Your written price includes every line item, and the free estimate is the moment you get that number, not a teaser. Call (682) 255-2399 and we’ll come see the lot.
We Also Serve Cities Near Keller
Our crews cover Keller plus the surrounding cities of North Richland Hills, Hurst, Fort Worth, and Arlington. Since dispatch is coordinated from the Dallas-Fort Worth metro office, scheduling a job in those areas doesn’t add a week to your start date. If you’re in Keller proper, we’re already on the local roads weekly. As part of our ADU Builders in Keller coverage, we’ll give you a straight answer on whether your HOA is likely to pass your plans.
Serving Keller, TX - Our Local Coverage Area
We’re based in the Keller 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 ADU Builders in Keller
Keller’s approval path runs through two separate gates, the city planning department and your HOA’s architectural review committee, and the committee usually meets only once a month. Fort Worth has fewer deed-restricted neighborhoods in the older core, and Southlake, while restrictive, tends to move its reviews in a more consolidated way. In Keller, a missed HOA submittal deadline adds four to six weeks to your calendar. We file both submittals in parallel and sequence the build so no work starts until the committee signs. Call (682) 255-2399 and we’ll map your specific timeline.
James Hardie fiber cement lap siding in muted earth tones, a 6:12 hip roof, and painted wood or composite trim are the standard pass in Keller HOAs. Avoid aluminum windows on any street-facing elevation if you can, since several committees here reject them outright. What actually happened in Marshall Ridge: the HOA initially rejected a detached ADU over roof pitch and facade color. We re-submitted with HardiePlank lap siding in the required ‘Cobble Stone’ tone and a 6:12 hip roof, then scheduled the MEP rough-in only after the architectural review committee signed off at their monthly meeting. That kept the project from stalling mid-frame.
Yes. Keller HOAs can enforce deed restrictions that forbid detached ADUs or second kitchens, even when the city’s zoning code allows them. The city permit does not override the private deed restriction. We read your CC&Rs before you spend money on plans, so you know which set of rules actually controls your lot. Call (682) 255-2399 for a free estimate that starts with that review.
We start with the survey, geotechnical report, and drawings, then file the city submittal and the HOA submittal at the same time. Foundation work waits until the HOA’s review committee has formally approved the exterior. Concrete, framing, and MEP then run in sequence without a forced stop. That scheduling discipline means a Keller ADU typically adds two to five weeks for approval, not the three to six months you get if a builder guesses and gets rejected.
Yes, Keller’s expansive clay requires a foundation engineered for soil movement, which the city will not waive. The standard is a reinforced slab with deeper perimeter beams or a pier-and-beam system depending on the lot. The geotechnical letter that documents this is a required attachment to your permit submittal, and missing it gets the plan kicked back. We include the letter in the first filing. Call (682) 255-2399 to talk about what your lot needs.
Written by Miles Hartwell, Owner at Sutton ADU Fort Worth, serving Keller and the surrounding metro.
