ADU Construction
Accessory dwelling unit construction in Temecula and Southern California
Stetson Contracting and Waterproofing builds accessory dwelling units (ADUs) for homeowners throughout Southern California. California has streamlined ADU regulations to encourage additional housing, and many homeowners are taking advantage of the opportunity to add living space to their properties. Whether you are considering a garage conversion, a detached backyard unit, or an attached addition, we handle ADU projects from planning through completion.
What We Offer
Detached ADUs
Standalone units built in your backyard or side yard. Separate structures with their own entrance, kitchen, and bathroom.
Garage Conversions
Convert an existing garage into a livable dwelling unit. Maximize your property's potential using existing structure.
Attached ADUs
Units built as an addition to your existing home. Connected but with separate entrance and living facilities.
Junior ADUs
Smaller units created within existing living space, typically 500 square feet or less with a separate entrance.
Full Build-Out
Complete construction including foundation, framing, electrical, plumbing, HVAC, insulation, drywall, and finishes.
Permitting Support
Navigate local ADU permitting requirements. California has established statewide ADU laws, though local requirements vary.
Why This Matters for Your Home
ADUs offer homeowners a way to add living space, accommodate family members, or create rental income potential. California law has made ADU construction more accessible by reducing barriers and streamlining the permitting process. An ADU is a significant construction project that involves foundation work, framing, plumbing, electrical, and all the finish work of a full home — just in a more compact footprint. Working with a licensed general building contractor ensures the project meets building codes and is constructed to last.
Our Project Process
Feasibility Review
Evaluate your property, discuss your goals, and review local ADU regulations and requirements.
Design & Permitting
Work through design, plans, and the permitting process. Coordinate with local building departments.
Construction
Full construction from site work and foundation through framing, systems, and finish work.
Inspections & Handoff
Coordinate required inspections, address any items, and deliver the completed ADU.
California Licensed General Building Contractor
CA CSLB #1083375 — Classification B: General Building Contractor. Verify our license directly with the Contractors State License Board.
Serving Temecula and Southern California
Project availability varies based on location, scope and scheduling. Contact us to discuss your project.
Related Services
Request a Free Estimate
Tell us about your project and Bob will review the details and get back to you.