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 Boerne
A home addition in Boerne typically runs $180 – $340 per square foot depending on finishes, foundation work, and whether you’re in a newer master-planned community or an older home near Main Street. Most bedroom additions take 8 – 14 weeks from permit to final walkthrough. If you’re wondering whether your HOA or builder warranty will complicate the project, that’s exactly the kind of thing we sort out before you spend a dime.
Our crews work throughout Boerne weekly, from Champion Heights down to the streets near Cibolo Creek. We know which subdivisions require architectural review, which lots sit in flood-prone zones, and how to phase the work so your family isn’t living in a construction site. Call (210) 981-6358 to talk through your addition with someone who actually knows this town.
Key Takeaways:
- Bedroom additions in Boerne run $190 – $320 per square foot; sunrooms run $160 – $280 per square foot.
- Builder warranties in newer Boerne communities require written approval before foundation or roof tie-ins.
- Our Home Addition Contractor team coordinates permits, HOA reviews, and builder warranty paperwork.
- Every project gets a written price before work starts, backed by our 365-Day Done Right Promise.
Why Seedling ADU San Antonio Is Boerne’s Preferred Home Addition Contractor Company
Boerne isn’t San Antonio, and we don’t treat it that way. The construction realities here are different: post-tension slabs in newer subdivisions, limestone soil that shifts with drought and rain, HOA architectural committees that review rooflines and siding profiles. Our Boerne clients tell us the thing they appreciate most is that we show up already knowing these constraints instead of learning them mid-project.
Ben Ortega, who leads our team, has walked enough Boerne lots to recognize when a foundation tie-in needs a structural engineer’s stamp before we draft the contract. That kind of local fluency matters when one wrong cut into a post-tension slab means a voided builder warranty. Our customers in neighborhoods like Esperanza and Champion Heights have left us strong reviews specifically for how we handled HOA coordination and kept the work site clean at the end of every day.
We’re not the cheapest option in Boerne, and we won’t pretend to be. What we offer is a written price before any work starts, background-checked technicians in uniform who introduce themselves at the door, shoe covers and drop cloths on every visit, and a live person who answers the phone at (210) 981-6358 throughout your entire project. That’s the Cedarwell Care Promise, and it’s in writing on every job we take.
One more thing. Scheduling and dispatch are coordinated from our San Antonio office, but the crews who work in Boerne are assigned to Boerne jobs week after week. They know the roads, the inspectors, and the supply houses. That consistency shows up in the work.
Bedroom Addition Contractor in Boerne
A Bedroom Addition Contractor in Boerne handles more than framing and drywall, especially in the newer master-planned communities where builder warranties are still active. Adding a 240-square-foot bedroom in Esperanza or Champion Heights means coordinating with the builder’s warranty department before any foundation tie-in, matching the existing James Hardie plank siding, and submitting plans to the HOA’s architectural review committee before the first permit can be pulled. In more established Boerne neighborhoods near Main Street, the work shifts toward matching older Craftsman or limestone details while upgrading undersized electrical panels and HVAC runs.
Bedroom additions in Boerne run $190 – $320 per square foot. A modest 200-square-foot bedroom typically lands around $38,000 – $64,000 when it’s a straightforward ground-floor addition with standard finishes.
Working Within a Builder Warranty
In Boerne’s newer subdivisions, many homes are still under the original builder’s 10-year structural warranty. Any addition that ties into the foundation or roof trusses must be approved in writing by the builder before work starts. We handle that correspondence for you, because a single unapproved cut into a post-tension slab voids the structural coverage and you’re on your own for any future foundation issues.
Builder-Grade Finishes Worth Replacing First
Most of the newer Boerne homes we work in have builder-grade carpet, hollow-core interior doors, and basic MDF trim. If you’re adding a bedroom, this is the right moment to swap those in the connecting hallway too. It costs $2,200 – $4,500 extra to upgrade door casing, baseboards, and flooring transitions throughout the affected common areas while the crew is already set up.
Sunroom Addition in Boerne
A Sunroom Addition in Boerne gives you year-round use when the Texas sun is brutal and the shade is welcome. On sloped lots near Cibolo Creek, drainage and floodplain rules shape the design before aesthetics do. Sunrooms here run $160 – $280 per square foot, with a typical 200-square-foot project landing between $32,000 and $56,000 depending on glazing choices, foundation work, and whether your lot triggers a floodplain development permit.
Glass Selection for Hill Country Heat
Boerne summers punish cheap glass. We spec low-E insulated units with a solar heat gain coefficient appropriate for west-facing exposure, which most sunrooms off the back of a home get. That adds $3,000 – $8,000 over builder-grade glazing but keeps the room usable in August without a second AC unit.
Drainage and Foundation on Sloped Lots
If your Boerne lot slopes toward Cibolo Creek, the city may require a floodplain development permit before a sunroom slab can be poured. That process takes 3 – 6 weeks and often means adding engineered drainage or raising the finished floor. We bring the surveyor and drainage engineer in during the estimate phase, so the price you see already reflects what the city will actually require.
Trusted Brands We Service in Boerne
We install and service additions built with James Hardie siding, Tuff Shed structures, and Abodu prefab modules. For Boerne customers, that means we can match the exact Hardie plank profile and color already on your home, which matters when your HOA’s architectural review compares the addition against the original elevation photos. We keep common profiles and trim pieces in local inventory so a siding match doesn’t stall your project for three weeks waiting on a special order.
Common Home Addition Contractor Problems We See in Boerne Homes
- Post-tension slab cuts without a tendon map. In newer Boerne communities, cutting into the slab without locating the tendon map first can crack the structure and void the builder’s warranty. We pull the map and mark it before any saw touches concrete.
- HOA stop-work orders after the framing starts. Champion Heights and similar subdivisions enforce setback and roofline rules strictly. We submit the architectural review package before permits, not after, so your project doesn’t get red-tagged midway.
- Unpermitted floodplain work near Cibolo Creek. Adding a sunroom or bump-out on a sloped lot without the floodplain development permit delays the job by weeks and triggers drainage engineering you didn’t budget for. We identify this risk in the estimate phase.
- Builder warranty voided by unauthorized foundation tie-ins. Many Boerne homes built in the last 10 years still carry the original structural warranty. Any foundation or roof truss connection needs written builder approval first. We get that approval in the contract phase, not after the concrete is poured.
Pricing for Home Addition Contractor in Boerne, TX
Here’s what addition work actually costs in Boerne right now. Bedroom additions: $190 – $320 per square foot. Sunrooms: $160 – $280 per square foot. Bathroom additions: $220 – $380 per square foot. Bump-outs (small 50 – 120 sq ft extensions): $18,000 – $45,000 total project cost. Garage additions: $140 – $260 per square foot for unfinished space. Second-story additions on Boerne homes run $250 – $400 per square foot because they require structural engineering and often temporary relocation of the family.
What changes the price the most: whether the lot slopes toward Cibolo Creek, whether the HOA requires upgraded materials you didn’t plan for, and whether the existing builder warranty imposes extra engineering review. You’ll get a written line-item quote before any work starts, and that number doesn’t change unless you change the scope. Call (210) 981-6358 to schedule a free on-site estimate.
We Also Serve Cities Near Boerne
Our crews regularly work in Home Addition Contractor in Boerne and the surrounding Hill Country communities, including Helotes, San Antonio, Universal City, and Cibolo. If you’re just over the Boerne line, we can still help. Call (210) 981-6358 and we’ll confirm coverage for your specific neighborhood.
Serving Boerne, TX - Our Local Coverage Area
We’re based in the Boerne 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 Boerne
Yes, it can, if the foundation tie-in or roof truss connection is done without written approval from the builder. Boerne homes in Champion Heights and other newer subdivisions are often still under the original 10-year structural warranty. We obtain the builder’s written approval during the contract phase, before any work begins, so your coverage stays intact. Call (210) 981-6358 and we’ll review your specific home’s warranty status.
No. Properties near downtown Boerne’s historic district fall under the Historic Landmark Commission’s design review, and a sunroom addition requires their approval before permits are issued. The review focuses on preserving 19th-century German stonework, window proportions, and rooflines. We prepare the commission submittal package with drawings that respect those standards. Call (210) 981-6358 to walk through what the commission will ask for.
The biggest hidden cost is usually the electrical panel and HVAC capacity. Most builder-grade Boerne homes have a panel sized to the original square footage and no spare breakers for a new bedroom’s circuit load. Upgrading the panel and extending a duct run to the new room adds $3,500 – $7,000 that many contractors leave out of the initial quote. We include it in the written price you receive before work starts. Call (210) 981-6358 for a line-item estimate that already accounts for this.
Generally no. Boerne HOAs like those governing Champion Heights enforce side setback minimums set by the city’s zoning code and the subdivision’s plat. A variance is possible but rare, and the architectural review process takes 4 – 8 weeks. We check your lot’s setback math against the plat before you commit to a design. Call (210) 981-6358 and we’ll pull your subdivision’s CCRs to see what’s actually allowed.
Sloped lots near Cibolo Creek often fall within a FEMA-designated floodplain, which means a bedroom addition requires a floodplain development permit and possibly an engineered drainage plan. Finished floor elevations must meet the city’s freeboard requirements. That adds $8,000 – $20,000 in engineering and grading to a typical bedroom addition, and it takes 3 – 6 extra weeks in permitting. We identify this during the free estimate so the price you’re quoted is the price you’ll pay. Call (210) 981-6358 to schedule yours.
Written by Ben Ortega, Owner at Seedling ADU San Antonio, serving Boerne and surrounding Hill Country communities. Ben leads a team of ADU Builders in Boerne that handles the HOA, warranty, and permitting details most homeowners don’t have time for.
