Limited Time Offer – Free 3D ADU Concept + Free Consultation
Limited Time Offer – Free 3D ADU Concept + Free Consultation
For over 30 years, we’ve helped homeowners across San Diego add smart, well-designed Accessory Dwelling Units to their properties. From early design and city approvals to full construction, our team manages the entire process so you can move forward with confidence.
(619) 673-5570
Book Your Free In-Home Estimate
Award-Winning ADU Builders in San Diego
Your dedicated project manager oversees every phase, keeping the process organized, efficient, and stress-free.
Independent living units designed for privacy, rental income, or extended family use.
Transform existing garages into fully functional living spaces.
Compact, efficient units ideal for smaller properties and fast approvals.
Maximize square footage with smart vertical layouts for limited lot sizes.
Transform unused basement space into a fully functional living unit that adds value, privacy, and long-term flexibility to your home.
Premium ADU Construction Materials & Finishes
Our team builds ADUs that hold up over time, require minimal upkeep, and feel like a natural extension of your property rather than an afterthought.
When it comes to ADUs, we focus on smart planning, solid construction, and long-term value. Every project is handled by experienced builders and managed by a dedicated project manager, ensuring clear communication and consistent progress from start to finish.
No two properties are the same. We design each ADU around your lot, zoning requirements, and goals, whether that’s rental income, family living, or future resale. With quality materials, thoughtful layouts, and a client-first approach, your ADU is built to perform and last.
1 Home Builders is changing how homeowners experience ADU construction. With custom designs, licensed professionals, and hands-on project management, our clients get more than an extra unit. They get a smooth process and results they can rely on for years.
Have questions see below for quick answers from our ADU specialists.
Most ADUs take 4 to 6 months depending on design, permits, and site conditions.
Yes. We handle all city permits, approvals, and inspections for you.
Detached ADUs, attached ADUs, garage conversions, and junior ADUs.
Costs vary by size, layout, and finishes. We provide clear estimates upfront.
Yes. ADUs are ideal for long-term rentals or housing family members.
Yes. From design to final inspection, everything is handled in-house.
Yes. Our work is backed by workmanship and structural warranties.
Call us or book a free consultation to review your property and goals.
Frequently Asked Call us now for immediate response & assistance (619) 673-5570
We visit your property, review zoning rules, discuss your goals, and provide a detailed estimate with no obligation.
Our team creates a 3D ADU layout so you can visualize the space. We finalize plans and manage city approvals.
Licensed builders bring the design to life using high-quality materials while keeping you updated at every stage.
We review every detail with you and ensure the ADU is fully approved, complete, and ready for use.
Every property has different possibilities. Choosing the right ADU type is key to maximizing space, usability, and long-term value. We help you select the best option based on your lot, budget, and goals.
A stand-alone unit offering maximum privacy and rental flexibility.
Cost-effective way to turn unused garage space into livable square footage.
Built onto the main home while maintaining architectural consistency.
Smaller units ideal for tight lots and faster approvals.
An ADU is one of the most flexible investments a homeowner can make. It adds usable living space while increasing property value and long-term options.
ADUs significantly boost resale appeal and market value.
Create a steady income stream with a long-term rental unit.
Perfect for aging parents, adult children, or guests.
Maximize underused space without buying new property.
When you build with 1 Home Builders, quality and accountability come standard.
We treat your ADU like a long-term investment, not just another project. From skilled craftsmanship and clear communication to clean job sites and reliable timelines, our team delivers work we’re proud to stand behind.
Your satisfaction is non-negotiable. If something isn’t right, we address it quickly and professionally. Our limited lifetime workmanship guarantee reflects the confidence we have in our builds and our people.
500+ completed projects across San Diego County.
Workmanship warranties and a commitment to quality.
Clear updates and stress-free coordination.
Straightforward pricing with realistic timelines.
Built for durability, comfort, and energy efficiency.
Design, permits, construction, and approvals handled fully in-house.
Your Dream ADU, Within Reach
Fast Approval
Apply in minutes and get quick decisions.
No Upfront Payment
Start with $0 down on approved plans.
Full Project Coverage
From design to full ADU construction.
Affordable Monthly Payments
Plans designed around your budget.
Introductory 0% Interest
Available for qualifying projects for a limited time.
Valid Till: 10/31/2025
Valid Till: 10/31/2025
Fill out the form or call (619) 673-5570 to schedule your free consultation today.
