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What is an ADU?
For over ten years, SBX Eco Construction has proudly supported San Diego families in bringing their home improvement dreams to life
An Accessory Dwelling Unit (ADU) is a small, secondary housing unit located on the same lot as a primary residence. ADUs can be fully equipped with their own kitchen, bathroom, and living space, making them suitable for various uses.
ADUs can take various forms, including detached units, garage conversions, or attached units. They are a popular solution for increasing housing density in urban areas and maximizing property use
Why build an ADU?
Boost Property
Value by 25–30%
ADUs can significantly enhance the value of your property, making it more appealing to potential buyers.
Generate Extra
Income with Rentals
Renting out an ADU can provide a steady source of rental income, helping to offset mortgage payments or other expenses.
Create Space for
Family or Guests
Having a dedicated space for guests can enhance comfort and privacy for both hosts and visitors.
Schedule A Free Design Consultation
Tell us about your vision—we’re ready to make it a reality
Types of ADUs We Build
DETACHED ADU
A detached ADU is a self-contained living space that is separate from the main residence on a property
Detached ADUs often have specific zoning regulations and permitting requirements, which can vary by location.
ATTACHED ADU
An attached ADU is a secondary living space that is physically connected to the main residence.
attached ADUs must comply with local zoning laws and permitting requirements.
CONVERSION
A garage conversion is the process of transforming an existing garage into a functional living space. This can involve various modifications and renovations to create an independent unit or an additional room.
How many ADUs can I build?
The number of ADUs (Accessory Dwelling Units) you can build depends on a few factors—especially your property zoning, lot size, and local city regulations. In California, most homeowners are allowed to add one detached ADU, one conversion ADU (like a garage or basement remodel), and one Junior ADU (JADU) within the main home.
Build Your ADU with Confidence
the SBX ECO CONSTRUCTION Way
Your property is unique — your ADU should be too. Our in-house designers and architects work with you to create a fully personalized ADU layout that fits your lot, matches your home’s style, and reflects your goals. From compact studios to 2-bedroom backyard homes, every square foot is thoughtfully planned.
Don’t let funding hold you back. We partner with trusted lenders and help you explore affordable financing solutions
We’ll help you find a financing plan that fits your budget — so you can invest in your property with confidence.
Navigating the ADU permitting process in San Diego, or the Bay Area can be complex — but not with us. Our team takes care of:
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Site evaluations & zoning checks
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Permit submittals & plan corrections
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City approvals & inspections
We speak the city’s language, so your project stays on track.
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We’re proud of our reputation for delivering high-quality craftsmanship — without unnecessary delays. Our construction team is fast, efficient, and detail-oriented. With clear timelines and transparent communication, you’ll always know what’s happening and when.
OUR PROCESS
Our streamlined process guides you from the first idea to the final walk-through, with a strong focus on quality craftsmanship, timely execution, and results that reflect your vision.
Phone Consultation
We begin with a friendly chat to understand your property, vision, and goals. Within 1–2 days, you’ll receive a preliminary feasibility review: zoning insights, overlay considerations, and potential challenges.
1
During your in-home consultation, our Project Specialist will assess your space, present tailored ADU strategies, and break down pricing that works with your vision.
In‑Home Meeting & Proposal
2
In 8–12 weeks, we conduct:
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Site surveys (planimetric, topographic)
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Utility and zoning analysis
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Floor plans, 3D renders, and exterior elevations
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Budgeting and assessment of any HOA or permitting hurdles
This Phase ensures your goals align with what local codes allow—and gives you a clear total project estimate
Feasibility Study & Concept Design
3
Once you approve the feasibility stage, we prepare full architectural drawings, structural reports, energy compliance, and permitting documents. Concurrently, you finalize material selections from our look book. We then issue a fixed-price construction agreement, guaranteed for up to 6 months during the permit process.
Construction Documents & Price Lock
4
Permitting & Application Management
We handle all submittals, coordinate with building departments, respond to plan check feedback, and manage permit fee administration. This stage typically takes 3–6 months, depending on jurisdiction, but we actively push to expedite approvals.
5
Construction Phase & Final Project Delivery
Once permits are issued, construction begins within 1–4 weeks. Our team uses robust project management tools to keep you updated every step of the way. Typical build time is 5–7 months, though complex or two-story units may take longer. We complete a final walkthrough and punch list to ensure your satisfaction.
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Estimated Total Timeline: 10–18 Months
Stage | What Happens | Timeline |
|---|---|---|
Free Discovery Call | Property & vision review + feasibility estimate | 1–2 days |
In‑Home / Virtual Meeting & Proposal | Detailed site review, design preferences, financing overview, proposal delivery | 1–2 weeks |
Feasibility & Concept Design | Surveys, zoning review, 3D design, preliminary budget | 8–12 weeks |
Construction Docs & Price Lock | Finalized drawings, material selection, cost lock-in | 4–6 weeks |
Permitting & Revisions | Permit submittals, revisions, fee management | 3–6 months |
Construction & Final Delivery | Site work, build execution, inspections, final handover | 5–7 months |
TESTIMONIALS
Client Success Stories: Hear What Our Clients Say
"Their block wall and paver work is exceptional."
John Dawsey
San Diego, California
"The retaining wall looks phenomenal and was completed in a timely manner."
lorentina Hofbauer
San Diego, California
Carlos and his crew EXCEEDED our expectations. Carlos was honest, straightforward, punctual, and helpful. He made my vision come true and was always available to answer questions.
Dianne
San Diego, California