A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted Home Addition Contractor for Houston Homeowners
A home addition in Houston typically costs between $80,000 and $250,000 depending on square footage, foundation type, and whether you’re building out or up. Most projects take 3 to 6 months from permit approval to final walkthrough, with sunrooms and smaller bump-outs running closer to $45,000 to $90,000. Lodgewick ADU Houston has been building additions in neighborhoods from Meyerland to Kingwood since 2010 as our Home Addition Contractor in Houston under the Kingswell family of home service companies, and we put every commitment in writing before the first nail goes in.
If you’ve been burned by a contractor who gave a lowball verbal estimate and then hit you with change orders, you already know why our approach is different. We hand you a written price before work starts. We show up in the window we gave you. And if something isn’t right within the first year, we come back and fix it under our 365-Day Done Right Promise. Call (361) 326-2313 to talk through your project with a real person, any hour of the day.
Sunroom Addition
A Sunroom Addition gives you a light-filled room that feels like a porch but lives like part of the house, and in Houston’s climate it’s one of the smartest ways to add square footage without a full foundation pour. Russ Delmar has designed sunrooms for homes throughout the Houston area, building from the ground up with insulated glass, proper flashing against Houston’s heavy rains, and HVAC tie-ins so the room stays usable in August. A sunroom addition in Houston typically runs $45,000 to $90,000 depending on size and whether you choose a prefab system or stick-built framing. We give you that number in writing before any work begins, with no price changes at the door.
Climate-Adapted Designs
Houston’s humidity and storm season shape every sunroom we build. We size the glass and ventilation right so the room doesn’t turn into a greenhouse in July, and we slope the roof and set flashing to handle the kind of downpours that overwhelm flat porch roofs in places like Spring and Sugar Land.
Prefab or Stick-Built
Some homeowners want a traditional framed sunroom and others want a faster prefab enclosure. We work with both. If you’re drawn to the efficiency of a factory-built unit, we can walk you through what systems match your lot and your budget, always with a written quote first.
Room Addition Contractor
A Home Addition Contractor Maintenance Checklist for Houston Homeowners starts with a Room Addition Contractor who builds a fully permitted, foundation-set room onto your existing home, whether that’s a family room, a home office, or a flex space for aging parents. Lodgewick ADU Houston handles the whole sequence: foundation and framing, rough-in for electrical and HVAC, drywall, flooring, and trim, with permits pulled and inspections passed. A single-room addition in Houston generally lands between $60,000 and $140,000 depending on the room’s size, whether it needs plumbing, and what’s under the slab. The Kingswell Guarantee means you’ll have a written price and a written guarantee before we mobilize a crew.
Foundation Matching
In Houston’s clay soils, foundation details make or break an addition. We check for existing slab settlement and design the new foundation so it moves with the old one, avoiding the step cracks that show up when a cheap addition is poured without proper tie-in.
Permits and Inspections
Every room addition we build in Houston goes through the city’s permitting process, and we pull the permits ourselves. When the inspection is passed, that’s documented for you. No cut corners, no “we’ll permit it later.”
Second Story Addition Contractor
A Second Story Addition Contractor builds upward instead of outward, adding bedrooms or a master suite above your existing footprint when your lot in neighborhoods like Bellaire or The Heights doesn’t have room to expand sideways. Lodgewick ADU Houston has built second story additions in Houston for over a decade, starting with a structural review of your existing framing and foundation to confirm the house can carry the load. A second story addition in Houston runs $150,000 to $300,000 or more depending on the size, whether a bathroom is included, and what reinforcement the original structure needs. You’ll get a written price before we start, every time.
Structural Evaluation First
Before we quote a second story, we check what’s underneath. Older Houston homes built on post-and-beam or under-sized joists sometimes need reinforcement before they’ll support a second floor. We tell you exactly what your house needs, with numbers, before you commit.
Living Through the Build
Adding a second story over a lived-in house is more disruptive than a ground-floor addition. We sequence the work so your first floor stays weather-tight and livable as long as possible, and we give you a realistic timeline in the written estimate instead of a guess.
Garage Addition Contractors
Garage Addition Contractors build either an attached garage onto a home that has none, or build a larger garage with living space above it, which Houston homeowners often use as a workshop, a studio, or a future ADU rental. Lodgewick ADU Houston handles garage additions as full builds: slab, framing, electrical, and doors, with a written price provided before any work starts. A standard two-car garage addition in Houston typically costs $40,000 to $80,000, while a garage with finished living space above can run $120,000 to $200,000 when you factor in insulation, a bathroom rough-in, and a separate entrance - and if you’re near the east side, we also serve as a Home Addition Contractor - Galena Park. We’ll break that out line by line so you know exactly where the money goes.
Detached vs. Attached
An attached garage ties into the existing roofline and usually costs less than a detached structure, but a detached garage gives you clearance from the main house. We’ll price both configurations so you can compare real numbers side by side.
Future-Ready Builds
Some garages start as parking and become something else later. If you might convert that space into an apartment or studio down the road, we can set the slab depth, plumbing stubs, and electrical rough-in to make the future conversion cheaper and cleaner. Ask us about home addition options when you call.
Bathroom Addition Contractor
A Bathroom Addition Contractor builds a new full or half bath where one didn’t exist, whether it’s a powder room off the hall, a master bath, or a second bath that keeps a growing family from fighting over one shower. A bathroom addition in Houston usually costs $30,000 to $75,000 depending on the fixtures, whether the addition square footage is new or carved out of existing space, and how far the new plumbing runs to tie into the main stack - and if you’re southeast of downtown, we also work as a Home Addition Contractor - Pasadena. Lodgewick ADU Houston manages the plumbing, waterproofing, and ventilation so the new bath meets code and doesn’t grow mold in Houston’s humidity. Your written estimate includes every fixture and finish we quote.
Plumbing Runs and Venting
The distance from the new bath to the existing drain and vent is the biggest cost variable. We map that run in the estimate and show you what the tie-in costs the day you get the quote, not three weeks into the job.
Moisture Management
In a climate as humid as Houston’s, bath fans that don’t move enough air or a shower that isn’t waterproofed correctly means mold inside a year. We spec fans by CFM for the room size and use sealed waterproofing systems on every wet wall, then put the guarantee in writing.
Bedroom Addition Contractor
A Bedroom Addition Contractor builds additional sleeping space onto your home, which in Houston’s market is one of the highest-return improvements you can make when your family outgrows the floor plan. Lodgewick ADU Houston builds bedroom additions that meet code for egress windows, closet requirements, and proper HVAC distribution, because a room that isn’t a legal bedroom won’t count when you go to sell. A bedroom addition in Houston generally runs $50,000 to $120,000 depending on whether it’s a simple bump-out or a suite with a bathroom. You’ll know the number before we start, in writing.
Legal Bedroom Requirements
A bedroom needs a certain window size for egress, a closet in most jurisdictions, and heat that reaches the room. We build to those standards so the square footage actually adds to your home’s bed-and-bath count when it’s appraised.
Appraisal and Resale Value
Houston appraisers value additions that look like they’ve always been part of the house. We match rooflines, siding, and floor heights so the new bedroom doesn’t read as a tack-on, and we can give you the cost per square foot before you decide whether to proceed.
Brands We Service
Lodgewick ADU Houston works hands-on with several of the leading prefab and panelized building systems on the market. We’ve built with Dvele panels on sites where the homeowner wants a tightly sealed, high-performance envelope without the waste of traditional framing, and we know how to coordinate Dvele’s factory schedule with Houston’s permitting timeline so the panels don’t sit on site waiting for an inspection.
We also work with Mighty Buildings and Boxabl systems for homeowners drawn to the speed and predictability of factory-built modules. Whether you have a Dvele, Mighty Buildings, Boxabl, or any other make in mind, we’ll marry the system you choose to the Kingswell Guarantee: written price, real arrival window, clean site, written guarantee, and a live person on the phone when you call (361) 326-2313.
Signs You Need a Pro Right Now
- Your slab shows a diagonal crack wider than a quarter inch. Houston’s expansive clay soil shifts through wet and dry seasons, and diagonal cracks near corners often indicate differential settlement. Adding onto a slab that’s already moving means the new addition inherits the same problem, so a pro needs to evaluate the foundation before you build.
- You found a handwritten quote without permits listed. If a contractor hands you a price that doesn’t include the cost of permits and inspections, you’re looking at an illegal build or a surprise invoice later. A legitimate Houston addition contractor pulls permits as part of the job and shows them in the written estimate.
- Your existing roof leaks where the new addition will tie in. A roof that already leaks at valleys or flashing will leak worse where a new structure joins it. The tie-in point between old roof and new roof is the number one failure location on additions, and it needs a flashing detail that’s done right the first time.
- The space you want to build over has a sagging ceiling or sticking doors. Sagging and sticking signal structural overloading or foundation movement under the existing footprint. Adding weight on top without addressing what’s underneath turns a cosmetic sag into a safety problem.
- You got a verbal estimate but no written scope of work. A price that isn’t written down with a defined scope isn’t a price, it’s a conversation opener. Without a written scope, every fixture, every finish, and every inspection becomes a change order later. Get it in writing or walk away.
Our Process, Step by Step
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Call and talk to a real person. When you call (361) 326-2313, a live person answers, any time of day. We’ll ask about your lot, your goals, and whether you have rough dimensions in mind, then schedule a site visit.
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On-site evaluation. Russ Delmar or one of our senior project leads walks your property, checks the foundation, the existing framing, the roofline, and the utility locations. We measure and photograph everything that will affect the build, so the estimate reflects your actual site, not a generic square-footage guess.
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Written estimate with line-item pricing. We hand you a written price before any work starts, with the scope listed line by line. What’s included, what’s not, which permits we’re pulling, and when the crew will arrive. No verbal ballparks, no “we’ll figure it out as we go.”
- 4
Permits, build, and inspections. Once you approve the written estimate, we pull the permits and schedule the inspections. Our background-checked, uniformed crew shows up in the window we gave you, keeps the site clean, and protects your existing home during the build.
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Final walkthrough and written guarantee. Before we call the job done, you walk the addition with us and we address anything that isn’t right. Then we hand you the written guarantee under the 365-Day Done Right Promise. If something fails within the year, we come back, free.
How Much Does a Home Addition Cost in Houston?
A home addition in Houston runs a wide range because no two lots, foundations, and floor plans are the same. A simple sunroom or small bump-out addition typically costs $45,000 to $90,000. A single room addition with foundation work runs $60,000 to $140,000. A second story addition starts around $150,000 and can exceed $300,000 for a master suite with a bath. A detached garage addition runs $40,000 to $80,000 for storage, and $120,000 to $200,000 when you add finished living space above it. Bathroom additions land between $30,000 and $75,000, and bedroom additions run $50,000 to $120,000 on average.
What moves the price most is the foundation. Houston sits on expansive clay, and some lots need piers or a deeper footing than others. The second big variable is the roof tie-in: a clean gable tie-in costs less than complicated valley intersections. Plumbing, if the addition includes a bath or kitchenette, adds real money based on how far the new lines have to run. We show every one of those line items on your written estimate so you can see exactly where the money goes, and we’ll tell you which upgrades add resale value and which ones don’t.
The best way to avoid overpaying is to get a written line-item quote and compare scope against scope, not just the bottom line. A low bid that doesn’t include the permit, the tie-in flashing, or the HVAC rough-in will catch up to you as a change order. Our free estimate includes the full scope in writing, and the price doesn’t change once you approve it. Call (361) 326-2313 and we’ll walk your property and give you real numbers.
Our Service Area Near Houston
Lodgewick ADU Houston builds additions throughout the Houston metro, including Katy, Sugar Land, Missouri City, Richmond, Friendswood, Deer Park, and Jersey Village. We also serve homeowners in Alvin and Dickinson south of the city, and in Spring and Channelview on the north and east sides. Most site visits are scheduled within a few days of your call, and our written estimate follows shortly after. If you’re anywhere in Harris County or the surrounding counties, we’ll come out and give you a real number. Have a garage you’re thinking about converting instead? See our Home Addition Contractor in Houston page or ask about garage conversion and home ADU options when you call.
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.
Frequently Asked Questions About Home Addition Contractor in Houston
A Home Addition Contractor designs, permits, and builds new finished square footage onto your existing home, whether that’s a ground-floor room, a second story, a sunroom, a garage, or a new bathroom or bedroom. The contractor is responsible for everything from foundation work through framing, electrical, plumbing, drywall, and finishes. At Lodgewick ADU Houston, we handle the full scope and hand you a written price and written guarantee before work starts. Call (361) 326-2313 to talk through your project.
Most home additions in Houston take 3 to 6 months from permit approval to final walkthrough, with smaller projects like sunrooms finishing in 6 to 10 weeks and second story additions running 5 to 8 months. Houston’s permitting timeline adds 2 to 8 weeks depending on the scope and the city’s current backlog. We give you a realistic schedule in writing as part of the estimate, and we tell you up front if weather or permit review is likely to stretch the timeline. Call (361) 326-2313 for a timeline specific to your project.
A home addition in Houston typically costs $45,000 to $300,000 depending on the type of addition. Sunrooms run $45,000 to $90,000, single room additions run $60,000 to $140,000, second story additions run $150,000 to $300,000, and garage additions run $40,000 to $200,000. The main cost drivers are foundation conditions, roofline tie-in complexity, and whether the addition includes plumbing. Our free written estimate shows you the exact line items for your project, so call (361) 326-2313 to schedule a site visit.
Yes, we work hands-on with Mighty Buildings and Boxabl systems, along with Dvele panels, for Houston homeowners who want the speed and predictability of factory-built components. We know the permitting path for these systems in Houston and Harris County, and we coordinate the factory schedule with the site preparation so nothing sits on your lot waiting weeks for an inspection. Call (361) 326-2313 to discuss which system fits your budget and timeline.
We answer the phone 24/7 with a live person, so if you have an urgent concern about an addition in progress or a warranty issue, you can reach us any time. For new addition builds, we don’t promise same-day starts or rushed timelines because permits and inspections set the pace, and we’d rather give you a real schedule than a false one. If something fails on a completed build within the 365-Day Done Right Promise period, we come back and fix it, free. Call (361) 326-2313 any time.
Every addition we build comes with our 365-Day Done Right Promise in writing. If the work isn’t right within one year of completion, we come back and make it right at no charge. This covers workmanship and the systems we install, and the promise is delivered in writing before the project starts, not buried in fine print after the job is done. Call (361) 326-2313 to ask about the guarantee on your specific scope.
Clear the area where the addition will be built, including moving outdoor furniture, potted plants, and any vehicles that block access to the build site. Mark or tell us about any buried utilities, sprinkler lines, or pet fence locations you know about, and pick a space where the crew can stage materials. We’ll walk you through a pre-construction checklist on the site visit and confirm the arrival window in writing. Call (361) 326-2313 to schedule your site visit and get the checklist.
Schedule Your Home Addition Contractor Service in Houston Today
If you’re ready to get a real number for your addition, call Lodgewick ADU Houston at (361) 326-2313. We’ll schedule a free site visit, walk your property, and hand you a written estimate with line-item pricing and a written guarantee. No obligation, no pressure, and a live person answers the phone any hour of the day. You’ll know exactly what it costs before you decide.
Written by Russ Delmar, Owner at Lodgewick ADU Houston, serving Houston since 2010.
