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 Houston
Building an ADU in Houston means adding a second dwelling to your lot, and getting that right starts with honest pricing and a plan that survives deed restrictions, Chapter 42 tree rules, and floodplain lifts. Most Houston ADU projects we scope run from $165 to $230 per square foot all-in, with a detached 650 sq ft unit typically landing between $107,000 and $150,000 before finishes. Russ Delmar leads our Houston team, and we’ve been doing this work since 2010 under The Kingswell Guarantee: written price first, real arrival window, clean job site, written guarantee on every project.
If you’re weighing a garage conversion in Meyerland or a backyard cottage in Garden Oaks, call (361) 326-2313 for a free estimate. A live person answers, and we’ll walk you through what’s realistic for your lot before you spend a dime.
Why Lodgewick ADU Houston Is Houston’s Preferred ADU Builders Company
Houston homeowners have seen enough price changes at the door and no-show contractors to last a lifetime. We operate differently. Every Houston job gets a written price before any work starts, and that number doesn’t move unless you change the scope. Our ADU Builders team has walked hundreds of Houston lots, and we know which subdivisions will fight a second dwelling and which ones won’t blink.
Russ Delmar and our crew work in neighborhoods across Houston, from the Heights to Westbury to Clear Lake. We’re familiar with how Chapter 42 tree surveys affect setbacks and how floodplain finish-floor elevations add cost. When you call, a live person picks up. Not a chatbot, not a voicemail loop. If something goes wrong after we finish, the 365-Day Done Right Promise kicks in, and we come back to make it right. That’s in writing, on every single project.
We coordinate scheduling from our Houston office, so when you book a site walk in Pasadena or a design consult in Bellaire, you’re talking to someone who actually knows Houston’s permit office, not a call center three states away.
ADU Plans in Houston
ADU Plans in Houston start with a deed restriction review, because Houston is the only major U.S. city without zoning. That means your setbacks, height limits, and lot coverage rules come from your subdivision’s deed restrictions and Chapter 42 buffers, not a single citywide code. A full plan set for a detached ADU in Houston runs $4,500 to $9,500 depending on lot complexity, tree survey requirements, and whether you need a replat.
We don’t skip this step. Skipping it is how homeowners end up with an unpermitted garage conversion that kills resale value when a title search flags a missing certificate of occupancy.
Deed Restriction and Tree Survey Review
Before we draw a single wall, we pull your subdivision’s deed restrictions and check for bans on second dwellings, minimum square footage rules, and HOA architectural review triggers. If your lot has protected trees, Chapter 42 requires a survey before any dirt moves, and the tree’s critical root zone can shrink your buildable footprint by 15% or more.
Permit-Ready Drawing Sets
We produce stamped, permit-ready drawings that match what the City of Houston expects for accessory dwelling units, including site plans, structural notes, and windstorm tie-down details. You get a set you can actually build from, not a pretty rendering that falls apart at the permit counter.
ADU Contractor in Houston
An ADU Contractor in Houston takes those plans and turns them into a finished dwelling, and that’s where the real cost drivers live. Foundation work, windstorm tie-downs, and floodplain finish-floor lifts change the number fast. As your contractor, Lodgewick ADU Houston manages the entire build: permits, inspections, subs, and schedule, with a written price for the full scope before we start.
We’ve seen too many homeowners underbid by missing the deed-restriction review, then eat a redesign when the HOA bans a second dwelling entirely. We don’t let that happen to our Houston customers.
Foundation and Floodplain Coordination
Houston soils shift, and parts of the city sit inside 100-year and 500-year floodplains. We handle soils reports, finish-floor elevation lifts, and pier-and-beam or slab decisions as part of the contract, so there’s no 12% change order after the soils report comes back.
Turnkey Build Management
From rough framing to final inspection, our uniformed, background-checked crew shows up in the window we give you and leaves the site cleaner than they found it. That’s The Kingswell Way, and it’s why Houston homeowners call us back for additions and garage conversions.
Trusted Brands We Service in Houston
We work hands-on with the ADU systems that make sense for Houston lots, including Boxabl, Plant Prefab, and Tuff Shed. Each one has a profile we match to your lot, budget, and timeline. We stock fast-moving parts at our Houston yard, so when a panel arrives damaged or a bracket needs swapping, we fix it without waiting on a freight truck from California. We also install James Hardie siding on most of our Houston builds because it holds up to the humidity and hurricane-season rain better than cheap alternatives.
Prefab isn’t always the right call, and we’ll tell you when a stick-built ADU pencils out cheaper on your specific lot. No brand loyalty for its own sake, just what works.
Common ADU Builders Problems We See in Houston Homes
- Unpermitted garage conversions. Houston’s no-zoning market makes it easy to assume an old garage conversion is grandfathered. It usually isn’t, and a title search during resale will flag the missing certificate of occupancy. We fix these legally, which matters when you sell.
- Deed restriction surprises. A lot in Sharpstown may allow a detached ADU, while a lot a mile away in Westbury bans second dwellings outright. We check before we draw, so you don’t pay for plans you can’t build.
- Prefab packages priced without Houston uplift. Manufacturers price Dvele or Cover packages assuming a simple slab, but Houston’s crawlspace-to-slab uplift and windstorm tie-downs add real cost. We factor that in from day one, not as a change order.
- Floodplain finish-floor miscalculations. Adding an ADU in a 100-year floodplain means lifting the finished floor above the base flood elevation. Miss that and the structure fails inspection or your flood insurance quote jumps. We get the elevation certificate right the first time.
Pricing for ADU Builders in Houston, TX
A detached ADU in Houston typically runs $165 to $230 per square foot. A studio ADU over a garage in Oak Forest might start around $85,000, while a two-bedroom detached unit in the Heights with custom finishes and a floodplain lift can reach $210,000. What moves the price: foundation type, tree removal or root-zone protection, flood elevation, deed-restriction fights, and your finish level.
We give you a written, line-item price before any work starts. Free estimates, no change orders unless you change the scope. Call (361) 326-2313 to schedule yours.
Here’s a quick look at typical pricing:
| Project Type | Typical Range (Houston) |
|---|---|
| Detached ADU (650 sq ft) | $107,000 – $150,000 |
| Studio ADU (400 sq ft) | $66,000 – $92,000 |
| Garage Conversion (existing footprint) | $82,000 – $128,000 |
| ADU Plans Only (permit-ready set) | $4,500 – $9,500 |
| Junior ADU (interior conversion) | $55,000 – $90,000 |
We Also Serve Cities Near Houston
Our crews serve Houston and the surrounding area, including Galena Park, Pasadena, Channelview, and Deer Park. If you’re just outside the city line, we’re still ADU Builders in Houston who know your local permit office and deed restrictions. Call us and ask.
Serving Houston, TX - Our Local Coverage Area
We’re based in the Houston 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 Houston
Yes. Houston’s lack of zoning doesn’t mean you can skip permits. You still need a building permit from the City of Houston, and if your lot sits in a floodplain, you need a finish-floor elevation certificate. Deed restrictions also still apply, and they can ban a second dwelling outright. Call (361) 326-2313 and we’ll check your specific lot before you pay for plans.
A detached ADU in Houston typically takes 7 to 11 months from first site walk to final inspection, assuming no deed-restriction fight and no unusual floodplain engineering. Prefab panel systems like Boxabl can shave a few weeks off framing, but Houston’s permit review and Chapter 42 tree surveys add time most homeowners don’t expect. We put the calendar in writing before we start.
If you have protected trees on your lot, Chapter 42 requires a tree survey before you pull a permit, and any construction inside a tree’s critical root zone needs mitigation or redesign. That can reduce your buildable footprint by 15% or more, especially on older lots in the Heights or Garden Oaks. We handle the survey, and we adjust the plan before you spend money on drawings that won’t pass.
Sometimes, but it depends on your soils report and floodplain status. Houston’s expansive clay soils often require deeper piers or a slab, and windstorm tie-downs add engineering that most prefab packages don’t include in their base price. We price the full Houston-specific foundation before you sign, so you don’t get a 12% change order after the soils report comes back.
Yes, a 500-year floodplain location can raise flood insurance premiums, though less than a 100-year floodplain. The bigger issue is the finished floor elevation requirement, which can add $8,000 to $20,000 to your build. We pull the elevation certificate and design to the right height from the start. For an exact quote on your lot, call (361) 326-2313.
Written by Russ Delmar, Owner at Lodgewick ADU Houston, serving Houston since 2010.
