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 Katy
A home addition in Katy, TX typically costs between $85,000 and $240,000 depending on square footage, foundation work, and whether your subdivision HOA requires design review. That’s a wide band, which is exactly why we put a written price in front of you before any work starts. Lodgewick ADU Houston is the ADU company of the Kingswell family, and our crews know Katy’s neighborhoods, its clay soil, and its permitting calendar well enough to give you a real number, not a guess. If you’re planning a room addition, second story, sunroom, bathroom addition, garage addition, or bump-out in Katy, call (361) 326-2313 for a free estimate and a scope that accounts for your specific lot, HOA, and foundation conditions.
Why Lodgewick ADU Houston Is Katy’s Preferred Home Addition Contractor Company
Katy homeowners call us because we treat the estimate like a contract, not a conversation starter. Russ Delmar leads our team, and he’s built our process around one commitment: a written price before a single nail is driven. That matters in Katy, where an addition often has to clear an HOA architectural committee before the city even looks at the plans. We file for HOA approval and City of Katy permits in parallel whenever possible, which keeps the calendar honest instead of optimistic.
Our crews are background-checked and uniformed, so when the truck pulls up in front of your Katy home, you know exactly who’s walking onto the property. We also answer the phone with a live person 24 hours a day, 7 days a week. If you have a question about your build, your permit status, or your written guarantee, you get a human being, not a voicemail loop. That’s the Kingswell Guarantee in practice.
Every Katy project gets the 365-Day Done Right Promise in writing before work begins. If the finish isn’t right, if the paint fails, if a door binds, we come back and make it right, free of charge, within the guarantee period. No fine print gymnastics. Just a written commitment.
Garage Addition Contractors in Katy
Garage Addition Contractors in Katy handle everything from extending an existing garage for a third bay or workshop space to building a detached garage with a finished room above it. This is one of the most common additions we scope in Katy, where many homes sit on lots large enough to accommodate a wider footprint but small enough that the HOA wants to see exactly what you’re planning before approving it.
A garage addition in Katy typically runs $45,000 to $110,000 depending on whether it’s attached or detached, the number of bays, and whether you finish the interior. The wildcard here is usually the slab. Katy sits on expansive clay soil that swells when wet and shrinks when dry, which means a garage addition often needs a deeper reinforced slab than the original home got when it was built. Under-bidding a garage addition without accounting for that soil requirement is the single most common pricing mistake we see from out-of-area contractors. We price for it from day one.
Attached vs. Detached Garages and HOA Limits
In Katy subdivisions like Young Ranch and Cane Island, the HOA’s architectural committee often has specific rules about detached structures. Some require the detached garage to match the home’s brick veneer, roofline, and even the garage door brand. We submit your elevation and material schedule to the HOA at the same time we pull permits with the City of Katy, which avoids stop-work orders and re-drawn plans.
The Foundation Reality in Katy Soil
Katy’s expansive clay doesn’t just affect the slab thickness. It affects pier depth if your garage addition ties into the existing foundation, and it affects drainage planning so water doesn’t collect against the new wall. We scope this before we give you a number, which is why our Katy estimates hold up against change orders that surprise other contractors mid-job.
Bathroom Addition Contractor in Katy
A Bathroom Addition Contractor in Katy scopes, permits, and builds new bathrooms where none existed, whether that’s a half bath near a back entry, a full bath for a new primary suite, or a second bath to break up morning traffic in a growing household. In Katy’s master-planned communities, this work almost always requires HOA architectural review in addition to City of Katy building permits, and the two timelines rarely line up perfectly on their own.
A bathroom addition in Katy generally costs $28,000 to $65,000 for a full bath with mid-range finishes, and $15,000 to $28,000 for a half bath. The cost drivers here are plumbing rough-in distance from your existing drain lines, waterproofing details, and whether the new bath triggers a requirement to bring the surrounding plumbing up to current code. In older Katy homes built before the city’s current plumbing code updates, that compliance work can add real money to a lowball bid.
When a Bathroom Addition Makes Sense
We see this request most often from Katy homeowners in neighborhoods like Falcon Point and Firethorne, where floor plans from the early 2000s put two or three bedrooms on a single hall bath. A new full bath near the secondary bedrooms changes the daily flow of the house without adding a second story.
What the HOA Needs to See
The Young Ranch job we scoped recently is a good example. The HOA’s architectural committee required the new bathroom’s exterior finish to match the existing brick veneer exactly, and they wanted a setback variance documented before the foundation crew could pull permits through the City of Katy. We handled that documentation in parallel with the plan review, which saved the homeowner roughly three weeks versus filing sequentially.
Trusted Brands We Service in Katy
For homeowners in Katy considering a prefab or panelized addition, we work directly with established manufacturers including Mighty Buildings, Boxabl, and Plant Prefab. These aren’t kit homes that arrive on a flatbed and get dropped wherever the crane can reach. They’re engineered structures that still need a proper foundation, utility connections, and finish work to meet City of Katy code and your HOA’s design standards. We handle the site work, the permitting, the connections, and the finish so the prefab core actually becomes a livable addition. We also work with Tuff Shed for detached studio and workshop structures where a full foundation isn’t required.
Common Home Addition Contractor Problems We See in Katy Homes
- HOA stop-work orders. A homeowner hires a contractor who skips the architectural review, the HOA finds out, and the job halts mid-framing. We file HOA submittals before the first inspection, not after the stop-work notice arrives.
- Expansive clay foundation surprises. Katy’s soil moves. A slab pour that would work fine in sandier soil northeast toward Jersey Village can crack and shift here if the contractor doesn’t spec the right reinforcement. We price for the soil we actually dig into, not the soil from some other market’s spec book.
- Plan review calendar miscalculations. The City of Katy’s development permit plan review takes real time, and it doesn’t pause while you wait for HOA feedback. Filing both in parallel is the only way to keep a realistic start date.
- Second story surprises on older slabs. Katy has a large stock of single-story homes built in the 1990s and early 2000s on slabs that were never engineered for a second story. A structural review isn’t optional here, and we don’t treat it like a formality.
Pricing for Home Addition Contractor in Katy, TX
Here’s what we tell Katy homeowners before they sign anything. A room addition runs $85,000 to $160,000. A second story addition runs $180,000 to $300,000 because it requires structural review of the existing slab and walls. A sunroom addition runs $35,000 to $85,000 depending on whether it’s a conditioned four-season room or a simpler screen-and-glass enclosure. A bathroom addition runs $15,000 to $65,000. A garage addition runs $45,000 to $110,000. A bump-out addition runs $30,000 to $70,000. These ranges assume mid-range finishes and typical Katy lot conditions. Your exact number comes in writing before work starts. Call (361) 326-2313 for a free estimate on your specific addition.
We Also Serve Cities Near Katy
Our Home Addition Contractor team serves Katy and the surrounding communities, including Richmond, Sugar Land, Stafford, and Missouri City. The permitting and HOA landscape shifts a little in each of those cities, but the pricing discipline and written guarantee stay the same. If you’re in one of those communities and planning an addition, the same free estimate applies.
Serving Katy, TX - Our Local Coverage Area
We’re based in the Katy 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 Katy
Plan review for a home addition in Katy typically takes 2 to 6 weeks once complete drawings are submitted, assuming no significant corrections are requested. HOA architectural review runs on a separate clock and can add 2 to 8 weeks depending on the subdivision’s committee schedule. Filing both in parallel keeps your start date from slipping by a month or more. Call (361) 326-2313 and we’ll map out a realistic calendar for your specific addition.
The most common change order we see is foundation-related: the soil under the existing slab is wetter or looser than the original plans assumed, and the reinforcement spec has to go up. It happens enough in Katy that we pre-price for the likelier scenario rather than handing you a surprise. That written price is the whole point of the Kingswell Guarantee.
No. A second story addition in Katy requires a structural engineer’s review of the existing slab, walls, and roof framing before the City of Katy will issue a permit. Homes built on slabs from the 1990s and early 2000s were rarely engineered for a second floor, and skipping that review is how you get cracked drywall and sagging floors two years later. We bring the engineer in before we give you a number.
In a master-planned Katy community like Young Ranch or Cane Island, HOA architectural review typically takes 2 to 8 weeks after you submit elevations, material schedules, and a site plan. Some committees only meet once a month, so a missed submission deadline pushes you a full cycle. We submit your package the week we finish scoping the job, and we track the calendar so you don’t have to.
It depends on the size of the addition and the current code cycle the City of Katy is enforcing at the time of permit. A large second story addition on an older home may trigger a requirement for interconnected smoke alarms or, in some cases, a residential sprinkler system. We’ll tell you before you sign, not after the inspector flags it. Call (361) 326-2313 for a free estimate that accounts for code compliance up front.
Get Your Katy Addition Scoped and Priced in Writing
A lodge is a small house on a larger property, and that’s exactly what an addition done right becomes: a room, a wing, or a second story that belongs to your home and your lot, not just to a set of plans. We’re Home Addition Contractor in Katy, and we believe the estimate is the first promise we make to you. Written price first. Real arrival window. Clean job site. Written guarantee. That’s the Kingswell Way. Call (361) 326-2313 to schedule your free estimate today.
Written by Russ Delmar, Owner at Lodgewick ADU Houston, serving Katy since the Kingswell family established the company in 2010.
