ADU Contractor in Pasadena, CA

Pasadena ADU Construction — Craftsman Character, Modern Function

Pasadena ADU construction — particularly in the Craftsman neighborhoods of Bungalow Heaven and San Rafael — involves historic garage structures, potential historic overlay considerations, and a Pasadena Building & Safety permit process that differs from LADBS. Caspi Construction manages all of it.

Building an ADU in Pasadena is not the same as building one in Van Nuys or Sherman Oaks. The Craftsman bungalows of Bungalow Heaven and San Rafael frequently sit on lots with historic detached garages that are architectural features in their own right — structures built in the early twentieth century with period-appropriate wood framing, siding, and roofing that has weathered gracefully alongside the main house. Converting these garages to ADUs requires structural assessment that goes beyond confirming that the slab is sound: the framing condition of a 90-year-old wood structure, the foundation's ability to support modified loads, and the design question of how to create a habitable modern unit without erasing the architectural character of the existing structure. Pasadena's historic overlay zones add a design review layer for some properties, and Pasadena Building & Safety has its own ADU guidelines that may differ from LADBS requirements. Caspi Construction is a licensed Pasadena ADU construction company (CSLB #1091631) with a 4.9★ rating and experience with both Pasadena's permit process and its historic neighborhoods.

Our Pasadena ADU Construction Services

Historic Garage Structural Assessment & Reinforcement

Older Pasadena garages — particularly those built before 1940 — often require more structural reinforcement than newer structures before they can meet current habitable space requirements. We assess foundation capacity, framing condition, and the adequacy of the existing slab for the new live and dead loads an ADU imposes. Structural reinforcement plans are prepared by a licensed structural engineer and submitted with the Pasadena Building & Safety permit application.

Period-Appropriate Exterior Design

For Pasadena Craftsman properties, the ADU exterior should complement the architectural character of the main house — not clash with it. We specify siding materials, window profiles, entry door styles, and roofing that are compatible with the Craftsman aesthetic. For properties in Pasadena's historic overlay zones, we prepare the exterior design documentation required for the Certificate of Appropriateness review before permit submission.

Pasadena Building & Safety Permit Navigation

Pasadena Building & Safety has its own ADU review standards, documentation requirements, and inspection schedule — separate from LADBS. For properties in historic overlay zones, a Certificate of Appropriateness from the city's Design & Historic Preservation section may be required before the building permit can be issued. Caspi Construction assesses historic overlay status at the start of the design process and manages all permit documentation and approvals.

High-Quality Interior Finishes

Pasadena ADU rental rates for a well-finished one-bedroom unit run $2,000–$2,800 per month — a market that rewards quality materials. We finish every Pasadena ADU interior with MSI tile in the bathroom, Caesarstone or MSI quartz in the kitchen, LIOHER or semi-custom cabinetry, Kohler fixtures, and LVP flooring that complements the ADU's architectural character.

→ Our full process for Pasadena ADU projects — from historic assessment through Pasadena Building & Safety final approval — is outlined at /process/

Why Pasadena Homeowners Choose Caspi for ADU Construction

Showroom Access

Our Tarzana showroom is about 30 minutes from Pasadena — Mon–Fri 9:30–6, Sat 10–5.

Premium Brands

Caesarstone, MSI, LIOHER, Kohler — quality finishes that support Pasadena's strong ADU rental market.

Pasadena Building & Safety Experts

Pasadena ADU permits differ from LADBS. Historic overlay considerations add an additional layer we know how to navigate.

Flexible Financing

Pasadena ADU construction typically runs $95K–$160K. Wells Fargo and Service Finance Company financing is available.

Recent ADU Projects Near Pasadena

Project 1 — Bungalow Heaven Historic Garage ADU

A Bungalow Heaven homeowner had a 1924 detached garage at the rear of their Craftsman bungalow lot — a structurally sound wood-frame building with original board-and-batten siding that had been thoughtfully maintained. The property was within a historic overlay zone, requiring a Certificate of Appropriateness review for any exterior modifications. We designed exterior changes that preserved the garage's original siding profile and roofline while adding two new windows in period-compatible divided-light profiles and a new entry door in a Craftsman style. The Certificate of Appropriateness was approved before the Pasadena Building & Safety permit application was filed. Interior work included structural reinforcement at the sill plates, MSI Calacatta Miraggio tile in the bathroom, Caesarstone countertops in the kitchenette, LVP flooring, and Kohler fixtures throughout. Construction was completed in eighteen weeks.

Project 2 — San Rafael Craftsman Lot New Detached ADU

A San Rafael neighborhood homeowner had a property with a large rear yard — ample for a new detached ADU — but no existing garage structure to convert. The existing lot was not within a historic overlay zone. We designed a 640-square-foot one-bedroom detached ADU with a modern-Craftsman exterior compatible with the neighborhood's architectural character, managed the Pasadena Building & Safety ADU permit process, and completed construction including full MEP systems, LIOHER cabinetry in the kitchen, MSI tile in the bathroom, Kohler fixtures, and LVP flooring throughout. The ADU contractor work in Pasadena was completed in twenty weeks from permit approval. The unit rents at $2,450 per month.

Project 3 — Madison Heights Garage JADU Conversion

A Madison Heights homeowner had an attached garage that shared a wall with the main house — the ideal configuration for a JADU under Pasadena's ADU guidelines. The homeowner's son had recently started working at a Pasadena firm and needed housing close to work. We designed a 480-square-foot JADU with a kitchenette featuring MSI White Arabescato quartz and a two-burner induction cooktop, a full bathroom with MSI subway tile and Kohler walk-in shower, LVP flooring, a mini-split for independent climate control, and a new exterior entry door with keypad lock. Financing through Wells Fargo was used to fund the project. The Pasadena ADU design build was completed in ten weeks under Pasadena Building & Safety JADU permit.

Start Your Pasadena ADU Construction Today

Caspi Construction responds within one business day — visit our Tarzana showroom or schedule an in-home consultation at your convenience. Financing through Wells Fargo and Service Finance Company is available, making it possible to move forward on your project without delay.