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 Friendswood
Building an accessory dwelling unit in Friendswood means adding a small, fully independent home on your existing lot, whether that’s a backyard cottage, a garage conversion, or a studio above a detached workshop. The biggest hurdle most Friendswood homeowners face isn’t the construction itself. It’s figuring out which building department has jurisdiction over your specific piece of property. Friendswood sits in both Galveston and Harris counties, so two houses a few blocks apart can answer to entirely different permit offices, septic rules, and flood-plain thresholds. That’s where our ADU Builders team comes in. Russ Delmar and our crews have built ADUs on both sides of the county line, and we’ll tell you the honest scope, cost, and timeline before you sign anything. Call (361) 326-2313 for a free estimate.
Why Lodgewick ADU Houston Is Friendswood’s Preferred ADU Builders Company
We’re the ADU division of the Kingswell family of home-service companies, established in 2010. Russ Delmar leads our Friendswood projects personally, and he’s walked enough lots here to know that Winding Way Drive and the areas off FM 528 don’t always follow the same permit playbook. We’ve handled detached units in Forest Bend, garage conversions near Friendswood High School, and backyard studios in Sunset Meadows. Our reputation in Friendswood comes from doing what we say: written price before work begins, a defined arrival window, a clean job site, and a written guarantee on every project. If the work isn’t done right within 365 days, we come back and make it right. No arguing, no chasing. A live person answers our calls 24/7, so you’re never leaving a voicemail when you need an answer about your build. Dispatch and scheduling run through our Houston office, but the crews you’ll see on your Friendswood lot are the same ones we send to every Galveston County job.
JADU in Friendswood
A JADU, or Junior Accessory Dwelling Unit, is a compact living space created within the footprint of your existing home or attached garage, typically 500 square feet or less. In Friendswood, a JADU usually means converting part of a garage into a studio with its own entrance, efficiency kitchen, and bathroom, leaving the main house’s systems mostly untouched. Homeowners choose a JADU when they need space for an aging parent, a returning adult child, or rental income without paying for a full detached structure. A garage-attached JADU in Friendswood typically runs $85,000 to $140,000 depending on finish level and whether you’re adding a bathroom from scratch or tying into existing plumbing.
Attached Garage Conversion
This is the most common JADU we build in Friendswood. The job starts by framing a separation wall between the garage’s remaining storage area and the new living space, then running electrical, insulation, drywall, and a mini-split HVAC system. Friendswood’s climate means humidity control matters more than most people expect. A garage conversion without proper vapor barriers and ventilation will smell musty within a year.
Interior Space Reconfiguration
Sometimes the best JADU route is carving space from an oversized bonus room, a formal dining room that never gets used, or a ground-floor den. We add the separate entrance, small kitchenette, and private bath while keeping the main home’s roofline and foundation unchanged. This approach often clears Friendswood’s setback requirements automatically because you’re not adding any new exterior walls.
ADU Plans in Friendswood
ADU Plans are the engineered drawings and permit-ready documents required before any accessory dwelling unit can break ground in Friendswood. These plans include site layout, foundation details, framing, electrical, plumbing, and energy calculations, and they must match what the reviewing jurisdiction expects. A full permit-ready ADU plan set for a Friendswood detached unit typically costs $4,500 to $9,500 depending on size, number of bedrooms, and whether you’re working with a prefab manufacturer’s stock drawings or starting from a custom design.
Detached ADU Site Plans
A site plan shows exactly where your new unit sits on the lot, measured against Friendswood’s required setbacks from property lines, easements, and any existing structures. This is the document that catches the most expensive mistakes early. We’ve seen homeowners pay for full architectural drawings only to discover the planned footprint violates the rear setback by three feet. We run setback checks before any design work happens, so your plan set reflects what the city and county will actually approve.
Custom Design and Engineering
When a stock plan won’t fit your lot shape, your septic envelope, or your family’s needs, we bring in local architects and structural engineers familiar with Friendswood’s wind-load requirements. Custom plans take longer and cost more, but they’re the right call on irregular lots in older neighborhoods like the homes along Friendswood Link Road. Every plan set we deliver includes the energy compliance documentation Galveston and Harris counties both require.
Trusted Brands We Service in Friendswood
We work with established ADU manufacturers and materials suppliers so Friendswood homeowners get predictable quality and faster timelines. We’ve installed Boxabl Casita units on lots where the compact footprint works well with local setbacks, and we’ve used Tuff Shed structures as starting points for backyard studios that need extra wind bracing. We also build with Mighty Buildings panels and Plant Prefab components when the design calls for them. We keep our Friendswood crews trained on these brands’ specific installation requirements, which means fewer surprises at inspection time. You’re not stuck with whatever a generic contractor feels like using. We’ll match the system to your lot, your budget, and your timeline, and we’ll put that recommendation in writing.
Common ADU Builders Problems We See in Friendswood Homes
- Split jurisdiction surprises. A property on the Harris County side of Friendswood answers to Harris County for septic and flood-plain reviews, while the city handles zoning and building permits. Assuming the city’s permit covers everything is the fastest way to lose a month on your timeline.
- Foundation setback re-stakes. Friendswood requires specific distances between a new detached ADU and property lines, easements, and the main home. If the staking is done wrong or skipped, you’re paying to re-stake and possibly shifting your whole footprint late in the process.
- Underpriced bids from Houston crews. Friendswood’s smaller subcontractor pool and extra trip time from Houston-based crews mean a bid that looks cheap often doesn’t account for the actual labor cost here. You get a change order or a crew that never shows.
- Wind and humidity problems. Friendswood gets Gulf-driven wind and high humidity year-round. An ADU framed or sealed without accounting for those loads and moisture levels will show problems in the first storm season, everything from racking walls to mold behind drywall.
Pricing for ADU Builders in Friendswood, TX
Here’s what we see in the Friendswood market right now. A garage-conversion JADU runs $85,000 to $140,000. A detached studio ADU in the 400 to 600 square foot range typically falls between $160,000 and $230,000. A two-bedroom detached unit with full kitchen and laundry runs $240,000 to $330,000. A custom-built unit on a difficult lot, meaning one that needs engineered pier foundations or extensive site work, can exceed $350,000. The biggest cost drivers are foundation type, septic system upgrades on the Galveston County side, and how far your electrical panel sits from the new unit. We give you a written price before any work starts, and that’s the price you pay. Call (361) 326-2313 and we’ll walk your specific lot and give you a real number, not a ballpark that changes later.
We Also Serve Cities Near Friendswood
If you’re outside Friendswood but nearby, we also build ADUs in Alvin, Seabrook, Dickinson, and Manvel. Each city has its own permit quirks, and we handle them the same way we do in Friendswood: with a written price, a clear timeline, and a guarantee in writing.
Serving Friendswood, TX - Our Local Coverage Area
We’re based in the Friendswood 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 Friendswood
The city of Friendswood issues the building permit and handles zoning review, while Harris County handles septic or on-site sewage clearance and flood-plain review for properties on that side of the county line. You’ll deal with two separate offices for one project, which is exactly why we coordinate both permit tracks for you. Call (361) 326-2313 and we’ll tell you which offices apply to your specific address before you spend a dollar on plans.
Yes. A JADU within the footprint of your existing home or attached garage generally preserves your existing parking configuration and rarely triggers fire sprinkler requirements, while a detached ADU in Friendswood may require an additional covered or uncovered parking space depending on your lot width and driveway access. The attached JADU route is often the fastest permit path in Friendswood. Call (361) 326-2313 for a free site assessment and we’ll tell you what your specific lot requires.
Plan review in Friendswood typically takes 3 to 6 weeks from submittal, longer if corrections are needed or if the property crosses into county review for septic and flood plain items. We’ve completed plan reviews in under four weeks when the drawings are clean and the site plan matches local setback requirements the first time. That’s the advantage of working with a builder who knows Friendswood’s reviewers. Call (361) 326-2313 to get your project started.
A Boxabl Casita typically arrives with engineering stamped for wind loads that meet Friendswood’s requirements, though the site foundation and anchoring system still need local approval. A Tuff Shed used as an ADU shell will almost always need additional wind bracing, sill anchoring, and possibly a foundation upgrade beyond what the standard shed pad provides. We handled this recently on a 640-square-foot Boxabl build off Winding Way Drive, coordinating the city zoning approval and the county septic clearance, then getting the final electrical sign-off before the homeowner moved their parents in. Call (361) 326-2313 and we’ll tell you what your chosen structure needs before you buy it.
After the shell is framed, you’ll have rough-in inspections for electrical, plumbing, and mechanical, then insulation and drywall inspections, followed by a final building inspection and, depending on your side of the county line, a septic or flood-plain sign-off. Friendswood’s inspectors are thorough, and they’ll check foundation anchoring, strapping, and tie-downs carefully because of local wind exposure. We schedule every inspection and stay on site through each one. Call (361) 326-2313 for an exact inspection sequence for your address.
Get Your Friendswood ADU Estimate
If you’ve been thinking about more space for family, a rental unit, or a quiet place to work, we’ll walk your Friendswood lot and tell you exactly what’s possible. You’ll get a written price, a defined arrival window for your crew, and The Kingswell Guarantee in writing before a single nail is driven. That means a clean job site, a price that doesn’t change at the door, and a commitment that if the work isn’t right within 365 days, we come back and fix it. Call (361) 326-2313 to schedule your free estimate. Russ Delmar and our Friendswood crews are ready when you are.
Written by Russ Delmar, Owner at Lodgewick ADU Houston, building ADUs in Friendswood, TX since 2010.
