Home Additions in Westlake, TX

Home additions for Westlake, a market we know.

Westlake is a small town with a big architectural expectation. The ARBs are thorough. The lots are large. The homes are custom — most built between 1998 and 2015 by regional custom builders (Simmons Estate Homes, Toll Brothers custom division, John Askew, Sharif & Munir, and a handful of others). Additions here have to respect the existing architecture, which usually means matching a Mediterranean, Tuscan, or Traditional exterior vocabulary with pinpoint accuracy.

We’ve built additions across Vaquero (the Westlake portion), Granada, Quail Hollow, Terra Bella, and Carillon since 2007. We know the ARB expectations, the specific exterior materials each subdivision requires, the way to design a second-story addition that reads as if the home was always meant to have one, and the way to tie a new covered patio into an existing tile roof without breaking the roofline.

Four addition scopes we build most often in Westlake.

Primary suite addition.

450-700 sq ft — bedroom, spa-grade bath, walk-in closet. Common when the original suite is under-sized or poorly oriented. Budget: $275K-$500K. Timeline: 18-26 weeks construction.

Second-story addition.

700-1,200 sq ft — typically a new primary suite plus a bonus/media room, or two bedrooms and a bath. Requires structural engineering of the first-floor bearing walls. Budget: $425K-$700K. Timeline: 22-32 weeks construction.

Sunroom + covered outdoor living addition.

200-450 sq ft of conditioned or semi-conditioned space, often combined with a covered patio, outdoor kitchen, and fireplace. Budget: $185K-$385K (structure + kitchen). Timeline: 14-22 weeks.

Pool house addition.

Detached 250-650 sq ft with full bath, small bar or kitchenette, sometimes changing area. Same finish grade as the main home. Budget: $300K-$650K. Timeline: 16-22 weeks.

What Westlake ARB review looks like from our seat.

We draft the submission package after design is locked with your designer. Elevations from all four sides. Site plan showing setbacks, easements, and the addition footprint. Exterior materials board matching what the ARB expects for your subdivision. Renderings from 2-3 angles. Submit, wait 5-8 weeks, respond to any revision requests. Most Westlake ARBs approve on the first or second cycle when the addition genuinely respects the home’s existing architecture. We’ve been through the Vaquero, Granada, and Terra Bella processes enough times to know what a first-round approval looks like.

What’s included in a Swanson Westlake addition contract.

• Design coordination with your interior designer (or one we introduce). Full interior finish plan locked before framing.
• Complete architectural drawings from our architect partners.
• Westlake ARB submission + Town of Westlake permits.
• Foundation, framing, roofing, exterior finishes matched to the existing home.
• Full MEP: new HVAC zone, electrical extension, plumbing, gas.
• Interior finish-out: insulation, drywall, trim, flooring, cabinetry, tile, fixtures — to your designer’s spec.
• Project management: BuilderTrend, weekly walkthroughs with you and your designer, Nancy as single point of contact.
• Site protection: ram-board, zip-wall dust barriers, daily cleanup.

Ready to talk about your Westlake addition?

Talk to Chad about your project — the first conversation is sixty to ninety minutes in your home, free, no pitch. Bring your interior designer if you have one; we’ll introduce you to one if you don’t.