From oceanfront estates in La Jolla to hilltop custom homes in Rancho Santa Fe, Hexagon Design + Build brings architect-led craftsmanship to San Diego County's most discerning homeowners.
Request a Free Project AuditSan Diego's coastal climate, hillside topography, and strict municipal codes demand a builder who understands the region inside and out. Hexagon Design + Build operates as a true design-build firm — one team handling architecture, engineering, permitting, and construction — so your project stays on schedule and on budget from concept through move-in.
Ground-up luxury homes designed for San Diego’s coastal and canyon lots. We handle everything from site analysis and soils engineering to final landscaping — typical builds range from $350–$600+ per square foot depending on location and finishes.
San Diego’s ADU-friendly regulations make it one of the best markets for accessory dwelling units. We design and build detached, attached, and garage-conversion ADUs that maximize your property value and rental income potential.
Kitchen and bath renovations, whole-home remodels, and room additions that transform your existing home. Our in-house design team ensures every detail — from cabinet hardware to structural headers — is planned before demolition begins.
San Diego’s year-round climate makes outdoor spaces a natural extension of your home. We design and build outdoor kitchens, pools, fire features, and covered patios that blend seamlessly with your architecture.
Oceanfront estates, coastal modern builds, and whole-home renovations in one of California’s most coveted zip codes.
Custom homes and luxury remodels in the village and surrounding blufftop neighborhoods overlooking the Pacific.
Estate-scale new construction and renovations on multi-acre parcels in San Diego’s most exclusive covenant community.
Coastal remodels, ADU construction, and modern custom homes from Leucadia to Olivenhain.
Every project follows our five-phase process — refined over hundreds of builds across San Diego County.
We visit your property, review zoning and HOA requirements, assess soils and topography, and define the project scope and preliminary budget.
Our in-house architects create schematic designs, 3D renderings, and construction documents — all coordinated with engineering from day one.
We manage the full permitting process with the City of San Diego or relevant jurisdiction — including plan check, coastal commission, and HOA review where applicable.
Our field team handles all construction with licensed subcontractors, weekly client updates, and a dedicated project manager from foundation to final walkthrough.
We conduct a comprehensive punch-list walkthrough, secure final inspections, and provide a full builder warranty on all workmanship.
Custom home construction in San Diego typically ranges from $350 to $600+ per square foot, depending on location, complexity, and finish level. Coastal lots in La Jolla or Del Mar tend toward the higher end due to site conditions and regulatory requirements. A 3,000 sq ft custom home might range from $1.05M to $1.8M+ in total construction cost.
A typical custom home takes 12 to 18 months from permit approval to completion. The permitting process itself can add 3 to 6 months depending on the jurisdiction and complexity. Projects in the Coastal Zone or with HOA review may take longer.
We serve San Diego County’s premier coastal and inland communities including La Jolla, Del Mar, Rancho Santa Fe, Encinitas, Solana Beach, Carlsbad, and Carmel Valley. Each area has unique zoning, permitting, and design considerations that our team knows well.
ADU costs in San Diego range from $150,000 to $400,000+ depending on size, type (detached vs. garage conversion), and finish level. San Diego’s streamlined ADU permitting process typically takes 60 to 90 days, making it one of the fastest markets in California for ADU approvals.
Design-build means one firm handles both architecture and construction. This eliminates the finger-pointing between separate architects and contractors, reduces change orders, and typically delivers projects 15–20% faster than the traditional design-bid-build method.
Schedule a free project audit with our team. We’ll review your property, discuss your vision, and provide a realistic scope and budget range.
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