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Rancho Toro y Oso, primary residence among grassland and hills, designed by Studio Prime Architectur
Portesi Residence, farmhouse beside a pond, designed by Studio Prime Architecture
Scottsdale Residence, desert modern home with pool, designed by Studio Prime Architecture
Pierce Residence, great room opening to valley views, designed by Studio Prime Architecture
Hillside custom home with covered deck, designed by Studio Prime Architecture
Aerial view of a hillside custom home at dusk, designed by Studio Prime Architecture
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Living room opening to the pool, custom home designed by Studio Prime Architecture
Salter Residence, living room with fireplace, designed by Studio Prime Architecture
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Courtyard patio with outdoor seating, custom home designed by Studio Prime Architecture
Lardizabel Residence, modern two-story home, designed by Studio Prime Architecture
Spanish-style custom home on a hillside, designed by Studio Prime Architecture
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Covered patio with fire pit and wood ceiling, custom home designed by Studio Prime Architecture
Rancho Toro y Oso, primary residence with mountain views, designed by Studio Prime Architecture
Kitchen island with bar seating, custom home designed by Studio Prime Architecture
Rancho Toro y Oso, milk parlor barn, designed by Studio Prime Architecture

Luxury Residential Architecture for California's Central Coast

SP-ARC designs custom homes and private estates shaped by the land, the way our clients live, and the enduring value of exceptional architecture. Based in San Luis Obispo, our studio works throughout San Luis Obispo County, Paso Robles wine country, and select locations across California.

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Led by Principal Architect John Bellisario, AIA, LEED AP, NCARB, SP-ARC combines architectural design with deep experience in construction, development, entitlements, and project execution.  Our Master Builder approach brings clarity to complex residential projects from early site planning through construction.

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20+ Years of Experience · Principal-Led Design · AIA · NCARB · Licensed in CA, AZ + HI

CUSTOM HOMES + PRIVATE ESTATES

THE MASTER BUILDER APPROACH

SP-ARC approaches architecture with an understanding that extends well beyond the drawing set.

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Principal Architect John Bellisario’s background spans high-end kitchen design, hands-on experience in the construction trades, architectural practice, construction management, and active real estate development. He holds a Bachelor of Architecture from Cal Poly San Luis Obispo, where he graduated magna cum laude, as well as a Master of Science in Construction Management.

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From the refinement of interior details and finish carpentry to personally navigating land acquisition, entitlement, construction, and development, this breadth of experience has shaped a more integrated approach to architecture.

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We call this our Master Builder approach—combining design vision with the technical, construction, and development knowledge needed to carry that vision from the earliest site decisions through the finished home.

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It allows us to approach each project not only as architects, but with an understanding of what it takes to successfully realize the entire property.

PROFESSIONAL SERVICES
modern drive-thru coffee shop

ARCHITECTURAL SERVICES

Full design services for custom homes and estates, from site planning and schematic design through permits and construction administration.

architectural construction documents

CONSULTING SERVICES

Entitlement, zoning and code consulting for property owners, developers and buyers evaluating a site.

Modern luxury residence

3D VISUALIZATION + MARKETING

Photoreal renderings, walkthroughs and look books that help you decide on a design or market a property.

modern farmhouse interior design

INTERIOR
DESIGN

Interior architecture and finish selections with trusted design partners, coordinated with the architecture from the start.

Modern Bathroom

AS-BUILTS / 3D SCANNING

Lidar-scanned as-built drawings of existing homes and buildings, fast and accurate, for remodels and additions.

971 Osos Street, San Luis Obispo, CA

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© 2026 Studio Prime Architecture (SP-ARC)

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