ADU Contractor in Redondo Beach: Costs, Sizes, and Custom Options for 2025
Accessory Dwelling Units (ADUs) are exploding in popularity across Redondo Beach — from backyard rentals to multigenerational living spaces and long-term property value boosters. With coastal homes often limited by lot size, a well-designed ADU adds privacy, income potential, and usable square footage without major disruption to the main home.
If you’re looking for an ADU contractor in Redondo Beach, here’s everything you need to know about pricing, custom layouts, garage conversions, detached new-build ADUs, square footage rules, and what to expect during the construction process.
Why Homeowners in Redondo Beach Are Building ADUs
ADU Construction in Redondo Beach, CA (BEFORE)
Redondo Beach is ideal for ADUs because:
Property values are high → ADUs increase equity
Many homes are older → families need more space
Rentals are in demand → ADUs generate stable income
Lots often have unused garages/backyards perfect for new construction
A custom ADU can become:
Rental unit
Guesthouse
Home office
Teen suite
Private space for aging parents
A luxury backyard retreat
Types of ADUs You Can Build in Redondo Beach
1. Garage Conversion ADU
ADU Construction in Redondo Beach, CA (AFTER)
Garage conversions remain the most popular ADU type in Redondo Beach because they:
✓ Use existing structure
✓ Are faster to build
✓ Cost less than new construction
✓ Don’t require giving up yard space
Perfect for: rentals, in-law suites, guest units.
Typical garage conversion size:
350–500 sq ft (1-bed or studio layout)
Common upgrades:
New framing + insulation
Plumbing + electrical
Mini-split HVAC
Full bathroom + kitchenette
Sliding or French doors
Vaulted ceilings (if possible)
2. Detached ADU (New Construction)
A detached ADU is essentially a small new home built in your backyard.
These are ideal when you want more space or a more premium layout.
Typical detached ADU size options:
400–600 sq ft: studio or 1-bed
700–850 sq ft: larger 1-bed or small 2-bed
1,000–1,200 sq ft: luxury 2-bed ADUs (max square footage allowed)
Detached ADUs offer:
✓ More design freedom
✓ Higher long-term value
✓ Better sound/privacy
✓ More rental income potential
This type of ADU works best for homeowners who want something that feels like a real second home, not just a converted space.
3. Attached ADU
Attached ADUs share one wall with the main home.
These are great for expanding your living area while still maintaining privacy.
ADU Square Footage Rules in Redondo Beach
Redondo Beach generally follows California’s state ADU laws, with some local conditions.
Key guidelines:
Max ADU size: 1,200 sq ft
No minimum lot size required
Junior ADUs (JADUs): up to 500 sq ft
Detached ADUs: must follow rear setback rules
Garage conversions: often do not require new parking replacements
We take care of all ADU permit requirements with the city of Redondo Beach, CA
ADU Pricing in Redondo Beach
Pricing varies by site conditions, finishes, and structure type, but here is a realistic 2025-2026 cost range for Redondo Beach:
Garage Conversion ADU:
$110,000–$195,000
(depending on plumbing, layout, finishes)
Detached ADU (New Construction):
$250,000–$475,000+
(based on size, foundation work, materials, and layout)
Attached ADU:
$180,000–$325,000+
What affects final cost?
Foundation requirements
City requirements
Slope/soil conditions
Upgraded finishes (quartz, tile, custom cabinetry, etc.)
Extra windows or doors
A/C, mini-split, or full HVAC
Bathroom layout complexity
Redondo Beach tends to run slightly higher than inland cities because coastal construction is more complex, and most homeowners choose higher-end finishes to match their main home.
What a Good ADU Contractor Handles for You
When choosing an ADU contractor in Redondo Beach, look for a team that handles:
✔ Architectural plans & structural engineering
✔ City permits
✔ Site prep and foundation
✔ Framing and roofing
✔ Electrical, plumbing, HVAC
✔ Interior design and layout
✔ Kitchenette + bathroom build-out
✔ Final finishes and inspections
This ensures the project stays compliant, on schedule, and within budget.
Timeline: How Long Does an ADU Take in Redondo Beach?
Design + plans: 4–8 weeks
Permits: 4–12 weeks
Construction: 3–6 months depending on type
Garage conversions are quicker; detached ADUs take longer because they are full new builds.
Ready to Start Your ADU Project in Redondo Beach?
Whether you want a garage conversion, a detached ADU, or a full custom living space, our team builds high-quality ADUs designed to look like they belong to your home — not an afterthought.
We’ll help you with design, permits, materials, and full construction start to finish.
