Garage Conversion San Diego
Transform your garage into a space that inspires and delights.
Shiro Builders Group reimagines garages as polished, purposeful living spaces, bringing design, permits, and construction together to create rooms that feel seamless, useful, and made to last.
Garage conversions designed for the way you live, work, and play.
Most San Diego homeowners use their garage for storage—or don't use it much at all. Meanwhile, they're short on the living space they actually need: a home office that isn't a kitchen table, a guest room that isn't a fold-out couch, a rental unit that could be generating income every month. A garage conversion solves that problem with some of the most cost-effective square footage you can add to a San Diego home.
At - Shiro Builders Group, we manage every part of the garage conversion process in-house. That means assessing the existing slab, walls, and roof structure; designing the interior layout; handling all permits with your local jurisdiction; installing insulation, drywall, HVAC, electrical, and plumbing; and finishing the space to the same standard as the rest of your home.
Ready to transform your San Diego home?
Call us or fill out a quick form. We'll schedule your free consultation at a time that works for you.
Book a Consultation Call (858) 630-6818Ready to start? Financing makes it easier
Your home improvement project shouldn't have to wait. Shiro Builders Group offers flexible financing options so you can begin your kitchen remodel, bathroom renovation, ADU build, or room addition today — and pay on a schedule that works for you.
We accept multiple payment methods for maximum convenience for homeowners across all of San Diego County.
Visualize your convetd garage with 3D rendering.
See your remodel before construction begins. Shiro Builders Group provides realistic 3D rendering services that help homeowners visualize layouts, materials, finishes, lighting, and architectural details before making final decisions.
Complementary services, delivered under one contract.
Flooring Installation
Every garage conversion needs flooring that fits its new purpose. Shiro Builders Group installs hardwood, luxury vinyl plank, tile, polished concrete, and rubber flooring across all conversion types—from rental units to home gyms to guest suites. We select and install materials suited to the use, the climate, and the rest of your home so the converted space feels finished, not improvised.
Interior Painting
A fresh interior paint job is one of the fastest ways to make a newly converted garage feel like a proper room. We handle full interior painting across the conversion and, if needed, the rest of the home—proper prep, clean lines, and durable finishes that hold up to daily use. Schedule it as part of your conversion project and we'll coordinate both scopes on one timeline.
ADU Construction
If your garage doesn't have the square footage or configuration for a full ADU, or if you want to maximize your property's income potential, a detached ADU build is a natural next step. Shiro Builders Group designs and builds detached accessory dwelling units across San Diego County—and bundling an ADU project with a garage conversion can reduce combined costs through shared permitting and mobilization.
Ready to start? Financing makes it easier.
We offer flexible financing options so your kitchen remodel, bathroom renovation, or ADU build can begin now. Serving all of San Diego County with multiple payment methods.
"I treat each home the way I'd want my own treated—built with discipline, built with intent, and built right the first time. That's a promise, and my name is on it."
From blank canvas to final walkthrough.
01 Initial Consultation
We start by understanding your goals, your timeline, and your budget. No pressure, no pitch—just an honest conversation about what's possible and how we'd approach your project.
02 Planning & Design Development
Our in-house design team develops detailed plans, 3D renderings, and material specifications. You review and approve everything before a single permit is filed.
03 Construction & Project Execution
Our crews handle all trades under one contract—no subcontractor hand-offs, no communication gaps. You have a dedicated project manager on your job from day one to final inspection.
04 Final Walkthrough
We walk the completed project with you, address any punch-list items, and don't consider the job done until you're satisfied with every detail.
05 Final Walkthrough & Handover
We don't hand over keys until you're fully satisfied. Every item on your punch list is resolved before we close the project and issue your written warranty.
Flexible payment options — no project too large
Once you receive your detailed quote, you can choose how to pay. We accept multiple methods and offer financing plans so your remodel can start on your timeline.
Garage Conversions: Common Questions
How much does a garage conversion cost in San Diego?
Garage conversion costs in San Diego typically range from $40,000–$80,000 for a basic living space conversion, $80,000–$130,000 for a full ADU conversion with kitchen and bathroom, and $25,000–$55,000 for a JADU conversion, depending on scope. Costs are driven by the size of the garage, the intended use, plumbing requirements, the condition of the existing structure, and permitting complexity in your specific city or neighborhood. We provide detailed, itemized estimates before any work begins so you know exactly what the project costs and why.
How long does a garage conversion take in San Diego?
A straightforward garage conversion to a home office or gym—without plumbing—can be completed in 4–8 weeks once permits are in hand. A full garage conversion ADU with a kitchen and bathroom typically takes 3–5 months from permit approval to completion. Total project timeline including design and permitting is usually 5–9 months depending on your jurisdiction. City of San Diego, Chula Vista, El Cajon, Carlsbad, and Escondido all have different permit review timelines—we factor your specific city into the project schedule from day one.
Do I need a permit to convert my garage in San Diego?
Yes. Any garage conversion that adds plumbing, modifies electrical, changes the structure, or creates a new habitable space requires building permits. Unpermitted conversions create problems when you sell, refinance, or file a homeowner's insurance claim—and they can require costly remediation to bring up to code later. Shiro Builders Group handles all permitting in-house across San Diego County jurisdictions, so your conversion is legal, inspected, and properly recorded from day one.
What is the difference between a garage conversion and an ADU?
A garage conversion is the physical process of transforming garage space into a different use—it could become a home office, gym, guest room, or rental unit. An ADU is a legal designation: a fully permitted, self-contained dwelling unit with its own kitchen, bathroom, and entrance. A garage conversion ADU is a garage that has been converted specifically into an ADU—combining both concepts. Not all garage conversions are ADUs, but many of the most financially valuable conversions in San Diego are built to ADU standards to allow for legal rental income. We'll help you determine which designation makes sense for your goals and property.
How do I know if my garage structure is suitable for conversion?
Most attached and detached garages in San Diego are structurally suitable for conversion, though the extent of work required varies. Key factors include the condition of the existing slab, the height of the ceiling, the quality of the existing framing, and whether the structure meets current setback requirements. We conduct a thorough site assessment as part of our initial consultation—reviewing the existing structure, pulling your parcel's zoning details, and identifying any structural work that would be needed before finishing begins.
Ready to put your garage to work?
Whether you're converting a garage into a rental ADU, a home office, a guest suite, or a gym, Shiro Builders Group handles design, permits, and construction under one roof across all of San Diego County. Let's find out what your garage can become.
