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Completed detached ADU — modern flat-roof with glass sliders

ADU Construction · Manhattan Beach

Licensed ADU contractor serving Manhattan Beach. Detached ADUs, garage conversions, and JADUs.

ADU Construction · Manhattan Beach

ADU construction in Manhattan Beach.

Manhattan Beach lot sizes and city ADU ordinances allow for accessory dwelling units that add significant value to already-premium properties. Whether you're planning a detached ADU, an attached addition, or a garage conversion, Ethos Building Group manages the full project — from feasibility review and design coordination through permits, construction, and city sign-off. We handle every phase in-house so nothing falls through the cracks.

ADU Types We Build

  • Detached ADUs
  • Attached ADUs
  • Garage Conversion ADUs
  • Junior ADUs (JADU)
  • Backyard cottages
  • In-law units

Construction Scope

  • Foundation and slab construction
  • Framing and structural work
  • Roofing and exterior siding
  • Electrical and plumbing systems
  • HVAC installation

Interior & Finishes

  • Kitchen and bathroom installation
  • Flooring and tile
  • Cabinets and countertops
  • Lighting and fixtures
  • Interior trim and finishes

◆ Our Process

From first conversation to final walkthrough.

Every project follows the same structured path — no guesswork, no surprises.

01

Feasibility Review

We evaluate your Manhattan Beach lot, setbacks, utility connections, and ADU options before scope development.

02

Design & Engineering

Design teams and structural engineering coordinated for compliant, buildable plans meeting Manhattan Beach requirements.

03

City Permitting

Full permit management including Manhattan Beach Building & Safety submissions, plan checks, and all required inspections.

04

Construction

Daily logs, progress photos, and direct PM access throughout the build. Clean site, organized crew.

05

Final Delivery

We complete the punch list, walk the finished unit, and ensure the city certificate of occupancy is in hand.

◆ FAQs

Manhattan Beach
Questions

Common questions from Manhattan Beach homeowners before starting a project.

Start My Project
Can I build an ADU on my Manhattan Beach property?+

Most single-family properties in Manhattan Beach can support at least one ADU under current state and local ADU laws. Lot size, existing setbacks, and utility connections all factor in — we evaluate your specific property during the initial consultation.

What setback rules apply to ADUs in Manhattan Beach?+

State law sets a 4-foot minimum rear and side setback for detached ADUs up to 800 sq ft. Manhattan Beach may have specific requirements for properties near coastal zones or in designated overlay districts. We review applicable regulations for your lot before design begins.

Does my Manhattan Beach HOA affect ADU construction?+

Under California law, HOAs cannot prohibit ADU construction that is otherwise permitted by the city. However, HOA design guidelines covering materials, colors, or architectural style may still apply to exterior work. We review your HOA's CC&Rs during the planning phase.

What's a realistic budget for an ADU in Manhattan Beach?+

ADU construction in Manhattan Beach typically ranges from $300,000 to $600,000+ depending on size, type, and finish level. Property values in Manhattan Beach often make the investment highly favorable. We provide a site-specific cost estimate after reviewing your property.

How long does ADU permitting take in Manhattan Beach?+

ADU permit review in Manhattan Beach generally takes 8–16 weeks depending on plan complexity, coastal proximity, and current department workload. We submit complete packages and coordinate directly with Building & Safety to move the process forward.

Can I rent out the ADU immediately after completion?+

Yes, once the city issues a certificate of occupancy. We walk you through the final inspection and sign-off process so you know exactly when you can legally rent the unit.

Manhattan Beach · Free Consultation

Start your Manhattan Beach project.

Tell us about your property and goals. We'll outline a clear scope and give you a realistic plan — no vague estimates.