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 Houston
Adding space to your Houston home starts with a real number in writing, not a guess. Lodgewick ADU Houston builds room additions, second-story additions, garage conversions, and bump-outs across Houston with a written price before any work begins. We know the difference between a Heights bungalow and a Kingwood two-story, and we know what Houston’s clay soil and floodplain rules mean for your foundation and permit path. If you want a straight answer about cost, schedule, and what the city will require, call (361) 326-2313 and talk to a live person. No voicemail loops, no callbacks at 9pm. Just a plain-spoken Houston addition contractor who will scope your job and put the number in writing. Russ Delmar leads our Houston team, and every project carries The Kingswell Guarantee: a written price first, a real arrival window, a clean job site, and a written guarantee on every build.
Why Lodgewick ADU Houston Is Houston’s Preferred Home Addition Contractor Company
Houston homeowners have been burned by contractors who quote low, start work, then hand over a change order at the door. That pattern is common enough in this market that we built our entire process around preventing it. Every Lodgewick ADU Houston project starts with a written line-item estimate. Not a verbal ballpark. A document you can hold us to. Russ Delmar and our Houston crew work under The Kingswell Guarantee, which includes the 365-Day Done Right Promise: if the work isn’t right, we come back and make it right, in writing, before the first nail is driven.
Our Home Addition Contractor team has framed additions from Garden Oaks to Meyerland, and we’ve learned that Houston’s permitting process rewards preparation. A homeowner who files the right paperwork the first time saves three to six weeks and thousands in carrying costs. That’s the local knowledge that matters. Our reputation in Houston rests on doing the unglamorous work: soil tests ordered early, stormwater permits filed alongside the building permit, and plans drawn to match what the City of Houston actually approves, not what a generic builder hopes it will approve.
Homeowners consistently tell us the same thing: they called because the price was in writing, and they stayed because the crew showed up in the window given and left the job site cleaner than they found it. That’s The Kingswell Way, and it’s how we’ve built a strong local reputation across Houston.
Bathroom Addition Contractor in Houston
A bathroom addition contractor in Houston handles the full scope: framing, plumbing rough-in, waterproofing, tile, fixtures, and the final inspection. In Houston, a ground-floor bathroom addition typically runs $38,000 to $72,000 depending on finish level, foundation condition, and whether the lot falls in a flood zone that triggers elevation requirements. An upstairs bathroom addition in an existing second story costs less per square foot on average, usually $24,000 to $48,000, because the roof and foundation are already in place. When a Houston homeowner needs a second or third bathroom, the most common driver is a growing family sharing one bath in a 1950s or 1960s ranch in areas like Oak Forest or Sharpstown.
Foundation and Floodplain Work
Houston’s expansive clay soil means a bathroom addition needs a soil test before plans are drawn. A bathroom on a pier-and-beam addition over a crawlspace has different movement characteristics than one on a post-tension slab. And if the lot is flagged by Harris County’s floodplain manager, the bathroom floor elevation becomes a hard requirement, not a suggestion.
What the Permit Requires
The City of Houston requires a Residential Building Permit for a bathroom addition, plus a plumbing permit and, on many lots, a stormwater quality permit. We file all three together so plan review doesn’t stall on a missing form. Our written estimate includes permit fees and the inspection schedule, so there’s no surprise line item when the city cashes the check.
Bedroom Addition Contractor in Houston
A bedroom addition contractor in Houston builds permitted sleeping rooms that add real square footage and resale value. A standard 12-by-14 bedroom addition in Houston runs $42,000 to $85,000 when attached to the existing home, with the higher end reflecting hardwood floors, a walk-in closet, and windows that meet current energy code. A bump-out bedroom of 80 to 120 square feet costs $28,000 to $52,000. Detached bedroom additions, which are treated as accessory dwelling units under Houston code, start around $110,000 for a permitted 400-square-foot build.
Bedroom Egress and Code
Every bedroom addition in Houston must meet egress requirements: a window large enough for a firefighter in full gear and a secondary exit path. Houston’s humid climate also drives the need for a properly sized HVAC run and insulation that prevents condensation in wall cavities. We size the system to the room, not the square footage on the plan, because a bedroom on the west side of a Houston house takes a different cooling load than one on the north side.
Second Story Bedroom Additions
Going up instead of out is common in neighborhoods like Montrose and the Heights, where lot coverage is already maxed. A second-story bedroom addition in Houston costs $180 to $320 per square foot, which includes structural engineering for the existing first-floor walls and a temporary roof opening. Houston’s wind load requirements under current building code add about 8 to 12 percent to the framing cost compared to older construction, and we account for that in the written quote before you commit.
Trusted Brands We Service in Houston
Lodgewick ADU Houston builds with materials and systems we can stand behind, and that includes working with established names like Dvele, Mighty Buildings, and Plant Prefab when the project calls for a prefab or panelized approach. A prefab addition can cut on-site framing time by four to eight weeks in Houston, which matters during hurricane season when weather windows are tight. We stock common trim, flashing, and fastener components for these systems in Houston so warranty service and punch-list fixes don’t wait on a cross-country shipment. When you need a James Hardie lap siding match on a 1930s bungalow in Garden Oaks or a modern panel system on a new build near Memorial, we can source it and install it under the manufacturer’s spec.
Common Home Addition Contractor Problems We See in Houston Homes
- Skipped soil tests. Houston’s expansive clay soil moves between wet and dry seasons. A foundation placed without a geotechnical report can shift within two wet-dry cycles, cracking drywall and jamming doors. We order the soil test before we finalize the foundation plan.
- Missing stormwater permit. Harris County’s floodplain manager can flag a Houston lot even when the FEMA map doesn’t. A homeowner who files only the building permit gets a stop-work order. We file the stormwater quality permit alongside the Residential Building Permit every time.
- HVAC and panel height violations. Houston code requires HVAC equipment and electrical panels to sit 18 inches above grade on additions. Contractors who set a condenser on a pad at grade fail final inspection and lose weeks. We build the equipment platform into the plans from day one.
- Lot-size hearing surprises. The City of Houston enforces a 0.5-acre rule: any lot larger than half an acre automatically requires a Special Minimum Lot Size Block length analysis and a public hearing before a home addition or ADU permit is issued. Homeowners who don’t know this get a permit delay of 60 to 120 days. We handle the hearing application and neighbor notification ourselves.
Pricing for Home Addition Contractor in Houston, TX
A detached garage ADU in Houston starts around $130,000 for a 400-square-foot unit with a bath and kitchenette, while an attached room addition runs $42,000 to $85,000 for a bedroom and $38,000 to $72,000 for a bathroom. A second-story addition costs $180 to $320 per square foot depending on structural work. What moves the number in Houston: soil conditions, floodplain elevation requirements, lot-size hearings, and the age of your existing foundation. We give you a written line-item price before work starts, and that price doesn’t change at the door. Call (361) 326-2313 to schedule a free estimate, and we’ll walk your lot, check the flood map, and hand you a real number.
We Also Serve Cities Near Houston
Lodgewick ADU Houston serves homeowners in Galena Park, Pasadena, Channelview, and Deer Park, and our crews know the permitting differences between each. Pasadena and Deer Park have their own building departments with separate permit paths, while Channelview falls under Harris County jurisdiction. We handle the paperwork for whichever authority governs your address, so you don’t have to sort out jurisdiction by yourself. Call (361) 326-2313 and we’ll tell you which rules apply to your project.
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 Home Addition Contractor in Houston
Yes, it needs a soil test, and it’s not an upsell. Houston’s expansive clay soil expands when wet and shrinks when dry, and that movement can crack a slab or shift a pier-and-beam foundation within two seasons. A geotechnical report tells the engineer what foundation design your addition requires. Skipping it to save $800 to $1,500 is a false economy when the fix for a moving foundation runs $15,000 or more. Call (361) 326-2313 and we’ll order the soil test as part of your written estimate.
If Harris County’s floodplain manager has flagged your Houston lot, your addition’s finished floor must sit above the base flood elevation, even if your addition is just one bedroom. That can mean raising the foundation or using a pier system, which adds $8,000 to $25,000 depending on lot conditions. The key is checking the floodplain status before you finalize plans, because a stop-work order after framing is far more expensive. We check our clients’ lots against the county’s floodplain data during the free estimate.
Yes, it will add 60 to 120 days. Any Houston lot larger than 0.5 acres triggers a Special Minimum Lot Size Block length analysis and a public hearing before a garage ADU permit is approved. This applies even if your ADU is small and the lot is only slightly over a half acre. We prepare the application, file the mailed notice to neighbors, and represent you at the hearing, so the delay is a known item on the calendar rather than a surprise. Call (361) 326-2313 and we’ll check your lot size against the rule on the first call.
The most common first-review failure in Houston is a missing stormwater quality permit, which is required on many addition permits in addition to the Residential Building Permit. A close second is HVAC equipment or an electrical panel shown below the 18-inch height-above-grade requirement. Both are fixable, but each false start costs two to four weeks in plan review. We file the stormwater permit alongside the building permit and draw the equipment platforms at the correct height, so the plan passes first review more often than not.
Usually yes, but the patio’s foundation, roof structure, and egress all have to meet current Houston code. If the patio was built on a standard 4-inch slab without footings sized for an occupied room, the slab typically needs to be cut out and replaced with an engineered foundation. If the roof framing was designed as an open porch cover, it needs structural upgrades to carry the ceiling, insulation, and roof load of a conditioned bedroom. A covered patio conversion in Houston runs $32,000 to $58,000 depending on what the original structure can support. Call (361) 326-2313 for a free evaluation of your specific patio.
Written by Russ Delmar, Owner at Lodgewick ADU Houston, serving Houston, TX.
