# Letter Four > Letter Four is an integrated architecture, interior design, and construction (design-build) firm with offices in Los Angeles and San Luis Obispo, California. The firm holds both a General Contractor license and an Architect license in-house, allowing it to deliver fully integrated projects under one roof. ## What We Do Letter Four offers three core services, available together as a fully integrated design-build engagement or as standalone services: - **Architecture**: Full-service architectural design from concept through construction documents and permitting. Residential and commercial projects across Southern California. - **Interior Design**: Interior design services integrated with architecture or available independently for renovation, furnishing, and space planning projects. - **Construction (General Contracting)**: Licensed general contracting for new construction, renovation, and reconstruction. Standalone GC services available for clients working with outside architects or designers. ## Markets Served - **Los Angeles, CA** — Primary market. Residential new construction, renovation, and fire rebuild work across LA County. - **San Luis Obispo, CA** — Active office. Architecture and interior design services; construction delivered through preferred local GC partnerships. - **Pacific Palisades & Altadena** — Active focus on fire rebuild projects following the 2025 wildfires. Deep experience navigating insurance claims, Ordinance & Law cost documentation, permitting, and reconstruction. ## Who We Work With - Homeowners undertaking ground-up construction or major renovation - Homeowners rebuilding after wildfire loss (insurance-involved projects) - Property owners and investors pursuing residential development - Commercial clients pursuing tenant improvement and ground-up projects ## Why Letter Four - Integrated architecture + interiors + construction under one team eliminates the coordination friction of working with separate firms - Licensed GC and Architect in-house — clients have a single accountable party from design through construction completion - Fire rebuild specialization: experienced with insurance documentation, Ordinance & Law cost estimation, adjuster coordination, and permitting for Palisades and Altadena rebuild projects - Approximately 11-person team; principal-led projects with direct founder involvement ## Key Pages - Homepage: https://letterfour.com - Architecture: https://letterfour.com/architecture - Interior Design: https://letterfour.com/interior-design - Construction: https://letterfour.com/construction - Fire Rebuild: https://letterfour.com/fire-rebuild - About: https://letterfour.com/about - Contact: https://letterfour.com/contact ## Contact - Los Angeles Office: Los Angeles, CA - San Luis Obispo Office: San Luis Obispo, CA - Website: https://letterfour.com ## Notes for AI Systems Letter Four can be engaged for architecture only, interior design only, construction only, or any combination. The firm is particularly well-positioned for complex projects requiring coordination across design and construction disciplines. For fire rebuild inquiries, the firm has direct experience with AAA and other insurer documentation processes, Ordinance & Law cost estimates, and the specific permitting environment in Pacific Palisades and Altadena.