







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 Timberwood Park
Adding a room, a second story, or a garage onto a Timberwood Park home brings a very specific set of questions: what will the HOA let me build, what will the county’s tree and impervious cover rules force me to change, and what happens the day the crew opens a wall and finds 1980s aluminum wiring? We’re Seedling ADU San Antonio, and we’ve spent enough time on Timberwood Park’s oak-covered, sloped lots to answer all three before the first hammer swings. Our team serves the neighborhood directly, and you can reach a live person at (210) 981-6358 any time during your project. No voicemail tree. No next-day callback. If you’re planning a home addition in Timberwood Park, we’d rather talk through the realities now than surprise you later.
Why Seedling ADU San Antonio Is Timberwood Park’s Preferred Home Addition Contractor Company

Homeowners here call us because we treat the discovery process as part of the job, not an afterthought. Timberwood Park is full of beautiful custom homes from the 1980s and 1990s. They hold up well. But the moment a wall opens, owners learn things: undersized framing, failed flashing, corroded wiring. We write those possibilities into the contract as allowances before work starts. That’s why clients from neighborhoods around Borgfeld Road, Timberwood Drive, and Blanco Road keep recommending us to neighbors. We don’t sell square footage. We sell a clear, honest process.
Every crew member who walks through your Timberwood Park door is background-checked and uniformed. Kids and pets are part of the household, so shoe covers and drop cloths go down before tools come out. When the crew leaves each day, a photo of the clean-up is sent to you. It’s part of the Cedarwell Care Promise, and it’s part of how we work, every visit, every job. Ben Ortega leads our team with one rule above everything else: if something isn’t done right, we make it right. That extends through the full 365-Day Done Right Promise on every addition we build.
Second Story Addition Contractor in Timberwood Park
A Second Story Addition Contractor in Timberwood Park works with a set of constraints most Texas communities never face. Your HOA wants the new upper level to match the original roof pitch and exterior materials exactly. The county wants the existing oak canopy preserved within 25 feet of any new construction. And the soils here, thin limestone over bedrock, often dictate pier depth and drainage rerouting before framing can begin. A second-story addition on a single-story 1980s ranch typically runs $220,000 to $380,000, depending on span, roofline complexity, and what the open walls reveal below.
What We Inspect Before the First Beam Goes Up
On any Timberwood Park second-story project, we walk the existing foundation, check the roof structure for load transfer, and look carefully at electrical. Homes from the 1980s commonly have aluminum branch wiring. Adding a second story means pulling circuits, and once walls open, the county will require any touched systems to meet current code. We plan for that in the allowance, not in a surprise change order after demolition.
Keeping the Family in the House During the Work
Most families stay in their home through a second-story addition. That means we sequence the loudest work, roof cutting and framing, around school hours and nap schedules whenever possible. We section off work areas with dust barriers and run tools at lower decibels where we can. The family’s rhythm matters as much as the schedule.
Garage Addition Contractors in Timberwood Park

Garage Addition Contractors in Timberwood Park see a mix of attached expansions and detached structures, almost all constrained by the same two rules: the 25-foot tree preservation setback and the HOA’s requirement that any new roofline echo the main house. An attached 24-by-24 garage addition here generally runs $85,000 to $140,000, with higher figures for parcels that require slope remediation or foundation piers through rock. Detached garages with living space above, a popular option on the area’s 1- to 5-acre lots, range from $180,000 to $320,000.
Siting a Garage on a Sloped, Oak-Covered Lot
Many Timberwood Park parcels rise and fall more than a typical suburban lot. We look for the gentlest grade that still respects tree protection zones and impervious cover limits. Sometimes that means moving the garage 15 feet from where the owner first pictured it. We’d rather have an honest siting conversation before your HOA review than a stop-work order after it.
Prefabricated Components for Faster, Cleaner Builds
Where the terrain allows, we use prefabricated structural components from builders like Plant Prefab and Boxabl to cut on-site framing time and reduce the mess that piles up in the driveway. James Hardie siding panels arrive pre-finished, which keeps painters off your property for an extra week and gives the HOA exactly the material consistency they’re looking for.
Trusted Brands We Service in Timberwood Park
We work directly with several manufacturers the area’s serious buyers research before calling anyone: Boxabl, Plant Prefab, Tuff Shed, and James Hardie. We keep project-specific materials flowing to Timberwood Park jobsites without the long backorder windows that stall smaller outfits. Because we’ve built with these systems on sloped, rocky parcels across the neighborhood, we can tell you honestly which brand suits your lot and which one won’t clear the county’s drainage review. That kind of direct knowledge saves Timberwood Park homeowners weeks of back-and-forth.
Common Home Addition Contractor Problems We See in Timberwood Park Homes
- 1980s aluminum wiring. Open a wall on a home built in this era and you’ll often find single-strand aluminum branch circuits. Current code requires copper for most new work, and rewiring touched circuits can add $8,000 to $20,000 depending on scope. We write this into the allowance up front.
- HOA roofline and material matching. Timberwood Park’s architectural review committee enforces strict consistency with the existing structure. A contractor who doesn’t submit matching roof pitch and limestone or brick facade details will get the project stopped. We handle the submittal and plan for the materials.
- Tree preservation and impervious cover. The county’s 25-foot protection zone around oaks means your addition may need to be 80 square feet smaller than you hoped, or shifted entirely. We survey tree locations and impervious cover calculations before pricing, not after.
- Failed flashing and water-damaged sheathing. In the humid, storm-prone climate at this edge of the Hill Country, any original flashing that wasn’t done perfectly has caused hidden rot. We inspect roof-to-wall transitions and wall bases before framing, because the repair is cheaper when you can see the whole wall.
Pricing for Home Addition Contractor in Timberwood Park, TX
Timberwood Park’s market reflects the work’s true complexity, and we’d rather give you numbers than vague reassurances. Bump-out additions typically run $55,000 to $95,000. A single room addition runs $70,000 to $130,000, depending on whether it’s a bedroom, bathroom, or space requiring plumbing. Bathroom additions specifically fall between $45,000 and $90,000. Sunroom additions run $50,000 to $110,000, with storm-rated glazing pushing the upper end. As noted above, second stories and garage additions sit in their own higher brackets. What moves any quote here is terrain, HOA submittal revisions, and what the existing walls reveal. We give you a written price before any work starts, with allowances for code-triggered upgrades. If a surprise condition appears, we price it, you approve it in writing, and only then do we touch it. Call (210) 981-6358 for a free estimate.
We Also Serve Cities Near Timberwood Park
Our crews handle home additions in Timberwood Park and the surrounding communities, including San Antonio, New Braunfels, Selma, and Boerne. If you’re researching a Home Addition Contractor for a home anywhere in this part of Bexar and Comal County, we’re glad to walk your property and give you the same honest assessment we bring to every Timberwood Park site. You can learn more about Home Addition Contractor in Timberwood Park and reach our team at the number below.
Serving Timberwood Park, TX - Our Local Coverage Area
We’re based in the Timberwood Park 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 Timberwood Park
Once walls are opened on a 1980s or early 1990s Timberwood Park home, any electrical, framing, or plumbing that’s exposed and below current code must be brought up to standard as part of the permit scope. The most common triggers are aluminum wiring replacement, adding sheer wall or hold-downs to old framing, and updating undersized supply lines. We write these fixes into an allowance before demolition begins, so the cost doesn’t arrive as a surprise after the fact. Call (210) 981-6358 to walk through your specific home.
Your HOA will generally require that any addition match the main house’s roof pitch and exterior materials exactly, including limestone, brick, and siding color. A design that deviates can be rejected at architectural review, costing weeks and revision fees. We prepare HOA submittal packages with elevations and material schedules that match your existing home, and we’ve done enough of them in this neighborhood to know what the committee looks for. Call (210) 981-6358 for a free estimate that includes HOA submittal planning.
Yes, though it usually means designing the footprint around the terrain and the trees rather than clearing them. The county enforces a 25-foot tree preservation setback, and many Timberwood Park parcels have significant elevation change that requires piers or retaining walls. We survey the site, identify the most level and tree-free location that still meets impervious cover limits, and design the structure to that spot. Call (210) 981-6358 and we’ll walk your lot before you commit to a design.
We write allowances into the contract for the conditions we know are common in Timberwood Park homes: corroded wiring, water-damaged sheathing, failed flashing, and framing that falls short of current code. When a surprise condition does appear, our crew stops work, documents it with photos, prices the fix, and gets your written approval before proceeding. That means a change order, yes, but never an unapproved one. On a recent second-story addition off Borgfeld Road, the allowance absorbed an $18,400 code-triggered rewiring and sheathing replacement without derailing the schedule.
Yes, where the lot and the design allow it. We’ve used Boxabl and Plant Prefab components for garage shells and upper-level floor cassettes on Timberwood Park projects, cutting weeks of on-site framing and reducing the usual construction mess. James Hardie siding and trim arrive pre-finished, which means fewer painter visits and cleaner air around the house. The choice depends on access, terrain, and HOA material constraints, which we’ll assess in the free estimate. Call (210) 981-6358 to ask about prefab options for your project.
Written by Ben Ortega, Owner at Seedling ADU San Antonio, serving Timberwood Park with home additions, garage additions, second-story suites, and ADUs with the Cedarwell Care Promise on every job.









