Home Additions in Bee Cave, TX

The Four Additions That Work Best Here

First, the rear primary suite. Bee Cave lots usually have depth, and pushing a bedroom, bath, and closet off the back keeps the street elevation untouched — which HOAs prefer. Second, the flex room bump-out: 180 to 300 square feet off a living area for an office, playroom, or gym.

Third, garage conversion plus a new garage bay, which recovers conditioned space without expanding the footprint much. Fourth, the second story over an existing single-level wing. Second stories cost the most per square foot because the existing foundation and framing have to be verified and often reinforced, but on tight-cover lots they may be the only option.

What Additions Cost in Bee Cave

Budget $400 to $550 per square foot for a well-finished ground-floor addition that matches the existing house, and $500 to $700 per square foot for a second-story addition. A 500-square-foot primary suite typically totals $220,000 to $300,000 including the bathroom, closet build-out, HVAC extension, and exterior masonry to match.

The most common budget shock is not framing — it is the parts nobody sees. Extending HVAC capacity, upgrading an electrical panel, matching stone or stucco that is no longer manufactured, and tying a new roof into an old one all carry real cost and none of them show up in a Pinterest photo.

Limestone, Foundations, and Drainage

Much of Bee Cave sits on shallow limestone. That is good news for foundation stability and bad news for the excavation line item, because trenching for footings, plumbing, and utilities may require rock saws or hammer work. We get a geotechnical read early rather than carrying a guess into the contract.

Drainage is the second site issue. Adding roof area means adding runoff, and on sloped lots that water has to be directed somewhere legitimate. Plan for gutters, buried downspout leaders, and sometimes a French drain. Neighbors notice quickly when this is done poorly, and so does the city.

City Review and HOA Architectural Approval

Additions in Bee Cave require a building permit and, on most subdivisions, a separate architectural committee approval from the HOA. These are independent tracks. The HOA may review elevations, materials, roof pitch, and color; the city reviews setbacks, impervious cover, drainage, and code compliance.

Run both in parallel and expect the combined approval window to be six to twelve weeks. HOA committees often meet monthly, so missing a submittal deadline can cost four weeks by itself. We build that calendar into the schedule from day one instead of treating it as a surprise.

Making an Addition Look Original

The tell of a bad addition is a roofline that does not resolve and a stone blend that does not match. We source masonry from the same regional quarries where possible and blend new stone into a transition area rather than butting old against new at a hard line. Same approach with stucco texture and paint, which fades on the original walls.

Inside, continuity matters just as much. Matching ceiling height, trim profile, and floor material across the threshold is what makes the new space read as part of the house rather than an appendage. If the existing floor is discontinued, we plan the transition at a logical doorway instead of mid-room.

Timeline and Living Through Construction

From first meeting to move-in, a Bee Cave addition is typically an eight to twelve month project: six to ten weeks of design and engineering, six to twelve weeks of approvals, and four to seven months of construction depending on size and weather.

Because most additions attach to the rear, families usually stay in the house. We keep the existing wall closed until the new shell is dry-in, which limits dust and keeps the house secure. The disruptive stretch is the week the opening is cut and the HVAC is tied in — we schedule that deliberately and tell you well in advance.

Frequently Asked Questions