Brentwood Custom Home Builder
Building a custom home in Brentwood takes more than a set of plans and a general contractor. This is a central Austin neighborhood governed by the McMansion Ordinance, marked by expansive clay soils, and full of mature heritage trees that shape what you can build and where. The permitting process runs through the City of Austin, and getting it right requires knowing exactly how the FAR limits, setback planes, and tree preservation rules interact on your specific lot. At Mission Home Builders, we approach every project with the technical rigor and process discipline these requirements demand..
Why Brentwood
Brentwood is one of central Austin's most sought-after neighborhoods, and for good reason. It sits roughly 6 miles and 15 minutes from downtown, with North Lamar Boulevard and Burnet Road providing direct routes in any direction. The neighborhood traces its roots to the post-World War II building boom, and that history shows in the tree-lined streets, wide lots, and genuine community identity that newer master-planned communities simply cannot replicate.
A Neighborhood With Real Character
The defining physical feature of Brentwood is the Arroyo Seco creek, which runs through a landscaped median planted with over 150 trees. The annual luminaria lighting along the canal, now more than 28 years running, is the kind of tradition that tells you something about the people who live here. The 120-foot Wall of Welcome mosaic, completed in 2008 by local artist Jean Graham with hundreds of community volunteers, anchors the neighborhood's identity in a way no developer could manufacture.
Brentwood Park provides 9+ acres of recreational space, including tennis and basketball courts, soccer fields, baseball diamonds, a community pool, and a playscape. The Sunshine Community Gardens, established in 1983 on 3 acres, adds to the neighborhood's outdoor character.
Burnet Road and Walkable Amenities
The western edge of Brentwood runs along Burnet Road, one of Austin's most vibrant restaurant and retail corridors. Barley Swine, Bufalina, Tacodeli, Little Deli, and dozens of other restaurants are within walking distance. HEB, Trader Joe's, and local boutiques are close by. For a central Austin location, the day-to-day convenience is exceptional.
Schools
Brentwood falls within Austin ISD and is served by a strong pipeline of schools:
Brentwood Elementary (PK-5): Located within the neighborhood. Ranks in the top 6% of Texas elementary schools, 7/10 GreatSchools rating, gifted/talented programming, and dual language classrooms.
Lamar Middle School (6-8): An arts magnet school with an A- Niche rating serving approximately 1,100 students.
McCallum High School (9-12): Home to Austin ISD's Fine Arts Academy, ranked 10th Best High School for the Arts in Texas. A- on Niche.
Who Lives Here and Why It Matters for Custom Home Buyers
76% of residents work in executive, management, or professional roles, placing Brentwood in the top 2.2% nationally for that metric. Over 57% hold a bachelor's degree or higher, and roughly 41% work from home. The median age is 37, and the neighborhood draws a mix of young families, UT-affiliated professionals, and long-term residents who have no intention of leaving.
For custom home buyers, the opportunity is straightforward: original 1940s and 1950s bungalows on 6,000 to 8,000+ square foot lots in a central Austin location that now commands premium prices. The teardown-and-rebuild path is well established here, with modern custom builds increasingly common and commanding prices in the $1.0M to $1.5M+ range. The combination of lot size, location, and neighborhood character is rare inside Austin's urban core.
Building in Brentwood: What You Need to Know
Brentwood sits entirely within the City of Austin's full-purpose jurisdiction. All permitting, zoning, and code enforcement is handled by the City of Austin Development Services Department through the Austin Build + Connect (AB+C) portal at abc.austintexas.gov. There is no separate municipal entity and no ETJ complexity. That said, the City of Austin's own regulations make Brentwood one of the more technically demanding places to build in the metro.
Zoning: SF-3-NP and the McMansion Ordinance
Most single-family lots in Brentwood are zoned SF-3-NP (Single Family Residence, Standard Lot, with Neighborhood Plan overlay). More significantly, Brentwood falls within the area covered by Austin's Residential Design and Compatibility Standards (Subchapter F), universally known as the McMansion Ordinance. This is the most important regulatory constraint for any custom home project here.
| Requirement | SF-3 Standard | McMansion Modification |
|---|---|---|
| Minimum Lot Size | 5,750 sq ft (50' x 115') | Same |
| Maximum Building Coverage | 40% of lot area | Same |
| Maximum Impervious Cover | 45% of lot area | Same |
| Floor-to-Area Ratio (FAR) | 0.4:1 (or 2,300 sq ft, greater) | Key limit on total building size |
| Maximum Height | 35 feet | Reduced to 32 feet |
| Front Setback | 25 feet (or avg. of block face) | May use avg. front setback |
| Side Setback | 5 feet minimum | Plus 45-degree setback planes |
| Rear Setback | 10 feet | Plus 45-degree rear setback plane |
| Side Wall Articulation | N/A | Required per McMansion |
The FAR Constraint in Plain Terms
On a typical 7,000 sq ft Brentwood lot, the 0.4:1 FAR limits total building area to approximately 2,800 sq ft. On a 6,000 sq ft lot, that drops to about 2,400 sq ft. The 45-degree setback planes (the "tent") further restrict second-story massing by requiring the building envelope to slope inward from a line 15 feet above the side and rear property lines.
Our approach:
Maximizing usable space within the McMansion envelope requires creative architectural thinking from the start of design, not after plans are drawn. We coordinate closely with the architect to leverage every allowance: garage area under 200 sq ft is excluded from FAR calculations, covered outdoor living and porch space can be optimized within the envelope, and efficient floor plans can deliver more livable area than the square footage number suggests. Getting this right at the design stage prevents expensive revisions later.
Permitting Process and Timeline
New construction in Brentwood goes through the City of Austin's standard residential plan review process, with an added layer of McMansion compliance review. Here is what to expect:
Initial plan review: 10 to 20 business days
Correction cycles: Typically 2 to 3 rounds at approximately 10 business days each
Total permit timeline: 3 to 6 months from application to permit issuance for most custom homes
Expedited review: Available for qualifying projects
Teardown-rebuild projects add demolition permitting and utility disconnection/reconnection to the front end of this process. Homes built in the 1940s and 1950s also commonly require asbestos and lead paint assessment before demolition can proceed.
Soil Conditions: Expansive Black Clay
Brentwood sits on the Blackland Prairie, east of the Balcones Escarpment. The dominant soil type is deep, clay-rich Vertisol, commonly called Taylor Black Clay or "black gumbo." This is among the most challenging soil types for residential construction in Texas.
Clay content can exceed 60%, with high shrink-swell behavior
The clay active zone extends 10 to 15 feet deep throughout most of central Austin
Soil can shrink up to 30% during drought cycles, then swell dramatically when saturated
Post-tension slab-on-grade foundations are the standard solution for new construction
A geotechnical report is required before design begins
Our approach:
We treat foundation engineering as a first-priority item, not a line item to value-engineer later. Proper geotechnical investigation, engineered foundation design, and drainage planning are built into our process from the start. Consistent moisture management around the foundation is one of the most important long-term performance factors in this soil environment, and we design for it accordingly.
Topography and Drainage
Brentwood's terrain is flat to gently rolling, which is a real advantage compared to Hill Country neighborhoods. There is no limestone bedrock, no rock excavation, and no blasting. That said, flat terrain combined with clay soils creates a drainage challenge that must be engineered carefully: water does not naturally flow away from structures, and clay absorbs water very slowly.
The primary topographic concern is the Arroyo Seco floodplain. Properties adjacent to the creek may have floodplain encroachment that affects buildable area, and FEMA floodplain status should be verified for any specific lot before purchase.
Our approach:
Every Brentwood project includes a drainage plan that accounts for the clay soil's absorption limitations. Proper grading, French drains where appropriate, and controlled drainage paths are standard components, not add-ons.
Tree Preservation
Austin's tree preservation ordinance applies fully in Brentwood, and the neighborhood has significant mature canopy, including large live oaks and pecans, that frequently drives building footprint decisions.
Trees with trunk diameter of 19 inches or more (at 4.5 ft above grade) require a City permit for removal or impact
Heritage trees (oaks, pecans, etc.) with 24-inch+ diameter receive the highest protection; trees over 30 inches can only be removed by City Council action
A tree survey identifying all protected and heritage trees is required for any new construction or major addition
Critical Root Zones restrict construction disturbance: the CRZ radius in feet equals the trunk diameter in inches
Our approach:
We bring in a certified arborist early in the design process so tree constraints are mapped before architectural plans are finalized. Large trees are constraints on paper and assets in reality. A well-designed home that works with a mature live oak rather than around it ends up being a better home.
HOA and Design Review
Brentwood does not have a neighborhood-wide homeowners association.
That said, individual lots in Brentwood may be subject to deed restrictions from the original 1940s and 1950s subdivision filings. Some of these restrictions are still technically in force; others have lapsed. A title search on your specific lot will confirm what applies before you build.
Your custom home design is otherwise governed by SF-3 zoning, the McMansion Ordinance, Austin's building codes, and tree preservation rules.
Construction Costs
For custom home construction in Brentwood, the primary path is purchasing an existing bungalow as a teardown and building new. Vacant lots are extremely rare. Typical land values for teardown candidates run $500K to $700K, with total project costs (land plus construction) generally ranging from $1.0M to $2.0M+ depending on size, finishes, and site conditions
Brentwood Quick Facts
| Category | Details |
|---|---|
| School District | Austin ISD |
| Elementary School | Brentwood Elementary (Top 6% in TX) |
| High School | McCallum High School (A-, Fine Arts Academy) |
| Median Home Value | ~$895K (single-family) |
| Price Per Sq Ft | ~$447 (78757 zip) |
| Typical Lot Sizes | 6,000 to 8,000+ sq ft (50' x 115-150') |
| Zip Code(s) | 78757 (primary), 78756 (southern) |
| Distance to Downtown | ~6 miles / ~15 minutes |
| Distance to UT Campus | ~4 miles / ~12 minutes |
| Population | ~9,300 |
| Governing Jurisdiction | City of Austin |
| Zoning (typical) | SF-3-NP |
| McMansion Ordinance | Yes (Subchapter F applies) |
| HOA | None (voluntary BNA only) |
| Property Tax Rate | ~2.0465% |
Sources: NeighborhoodScout, Orchard, Niche, GreatSchools, City of Austin, Travis CAD (updated March 2026)
Why Choose Mission Home Builders
Custom Home Building Made Easy
Mission Home Builders was founded by Nic Andreani, a licensed Professional Engineer with 20+ years of construction experience, and Schuyler, a top 1% Austin realtor. Our team has built over 554 homes across our careers with a combined 79+ years construction experience. That background shapes a process built around one goal: making custom home building predictable and stress-free.
Whether you are starting from scratch or already have plans, Mission can handle the entire project from A to Z, including lot selection if needed. You bring the vision. They take care of the rest.
Engineering Discipline Applied to the Building Process
Nic's engineering background means nothing falls through the cracks. In Brentwood, where the McMansion Ordinance, clay soil foundation requirements, and heritage tree constraints all have to be addressed in coordination, that discipline matters.
Structural engineers, geotechnical consultants, certified arborists, and energy compliance reviewers selected and coordinated for each project
Pre-permit McMansion compliance review before City submission
Foundation engineering and drainage management planned from day one
A Clear, Transparent Process
Mission's step-by-step system keeps projects on time, on budget, and fully transparent from the first conversation to the final walkthrough. Weekly updates, one point of contact, and client portal access mean no guessing, no chasing, and no surprises. Our Leadership team is personally involved from site evaluation through final walkthrough backed by a field team with 79+ years of combined experience.
Ready to Build in Brentwood?
Brentwood has real constraints, but it also has real opportunity. If you want to build here, let's talk. Mission Home Builders can help at every stage, from finding the right lot to delivering the finished home. We will walk through your project, explain exactly what the McMansion Ordinance and clay soil conditions mean for your design, and help you figure out what is possible and what it will cost.
