Residential Architect in Atherton | Remodels, Additions, and Custom Homes
Atherton is different from every other city in this service area. There are no commercial zones. The entire town is residential. Minimum lot sizes start around one acre in the R1A district and the housing stock reflects it: large estates, mature tree canopies, long driveways, homes set well back from the street. The permit process coordinates across multiple departments and outside agencies, and Menlo Park Fire Protection District approval is a required step for most projects.
Regulations change and every property is different. This page reflects general conditions in Atherton, not a substitute for a property-specific feasibility review.
Atherton Homeowners We Work With
Projects in Atherton tend to go well beyond a typical addition or remodel. Many homeowners are evaluating whether an existing home can be made to work for the family's needs or whether a new structure is the better path. Some are adding a major addition to an estate home and need to understand how the FAR limit, the existing accessory structures, and the tree canopy interact before any design decisions are made. The FAR calculation across all structures on the lot is the first number that defines what is possible here.
Common Project Types
Home Remodels and Renovations
Atherton's housing stock spans multiple decades and architectural styles on wooded parcels. Interior remodels that do not change the exterior or add square footage may move through building permit review without engaging Planning. Any exterior change, added square footage, or significant structural modification requires Planning coordination and typically Menlo Park Fire Protection District clearance. Tree protection is a constant: most Atherton lots have significant oaks and other protected species that shape where the building can go.
Home Additions & Second Story Expansions
Additions in Atherton are governed by FAR limits that vary by zone (R1A and R1B) and lot size. All structures on the lot count toward FAR: main residence, guest house, pool house, equipment buildings, garages. Understanding exactly where the property sits relative to the FAR limit before design begins is the foundational question. The Menlo Park Fire Protection District requires a direct separate submittal through its own online portal with separate fees. This is a parallel track that needs to be initiated early, not treated as a final step.
Custom Homes and Rebuilds
New homes in Atherton require Planning review, Building plan check, and MPFD approval. Utility company Will Serve letters are also required for new main dwellings. Geotechnical report or engineer's letter required for most significant projects. A Tree Protection Plan must be installed and inspected before the permit is issued.
The Approval Process in Atherton
Atherton's Permit Center coordinates Planning, Building, and Public Works review in a single point of service. Every significant project submittal requires: site plan, construction plans, Tree Protection Plan, MPFD approval letter, geotechnical report or engineer's letter, and school district impact fee notification.
Total timeline from design start to permit: typically 10 to 18 months for significant additions and new construction.
Working on a Project in Atherton?
The Discovery Call is a simple first conversation about your property, your goals, and the path forward for the project before any design work begins.
Areas We Work In
We work throughout the South Bay and Peninsula, including the following cities. Each city links to a relevant project pathway and design and permitting context for that area.
Atherton · Menlo Park · Palo Alto · Redwood City · Portola Valley · San Mateo · Hillsborough · Woodside · San Jose