San Diego, California · Design · Build · Integration
Accessory Dwelling Units (ADUs)
Rental income, room for family, or a home office — we design and build ADUs that fit your lot and budget.
- Design & build under one roof
- Licensed & insured — CSLB #877267
- 400+ San Diego projects since 2006 (20+ years)
- Free, no-obligation consultations
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Tell us about your project — a real person will get right back to you.
Accessory Dwelling Units, done right
An ADU is one of the most valuable additions you can make to a San Diego property — whether you want rental income, a private space for family, a home office, or room for aging parents to live close by.
Stel Builders designs and builds detached ADUs, attached ADUs, and garage conversions. As a design-build firm, we navigate San Diego's evolving ADU regulations, design a unit that fits your lot, and build it to the same standard as the main home.
ADU options we build
- Detached ADUs (backyard cottages)
- Attached ADUs
- Garage conversions
- Multigenerational and aging-in-place layouts
Why an ADU makes sense
A well-designed ADU adds living space, long-term value, and income potential. We'll walk you through what's possible on your property, give you a realistic cost range, and handle design, permitting, and construction with one point of contact — backed by a written warranty.
See it for yourself
Frequently Asked Questions
Will an ADU add value to my property?
A well-designed ADU can add living space, rental income potential, and long-term value. We design ADUs to suit your lot, your budget, and current California and San Diego regulations.
Can you build a detached ADU and an attached one?
Both. We build detached ADUs, attached ADUs, and garage conversions — we'll recommend the best fit for your property during your consultation.
Design · Build · Integration
Let's build something beautiful.
Call (619) 334-3322 or request your free design-build consultation.