Home Addition Drawings · Manhattan Beach, CA
Permit-Ready Home Addition
Drawings for Manhattan Beach, CA
Expand your home with a permitted room addition, second story, or family room extension. We deliver complete, code-compliant drawing sets for Manhattan Beach's building department — 14-day money-back guarantee.
14-day money-back guarantee · permit-ready delivery
Local Intelligence
What Manhattan Beach Homeowners Need to Know Before Submitting
Size & Zoning Rules
Any new square footage added to your Manhattan Beach home counts against the same zoning envelope that governs ADU size, meaning large additions may affect your ability to add a future ADU. Manhattan Beach's current ADU size cap is 1,200 sq ft — generous enough to accommodate most project types.
Manhattan Beach does not impose an owner-occupancy requirement, so you can rent both the main home and any ADU or conversion as investment units.
If the addition creates a second unit or is later converted to a rental, Manhattan Beach's ADU market supports approximately $3,103/month for a 2-bedroom unit.
Permit Process & Fees
Addition permit packages submitted to Building and Safety must include a site plan, floor plans, all four elevations, an electrical plan, and energy compliance documentation — plus stamped structural drawings are always required for any load-bearing elements, second-story work, or new foundation.
Visit Building and Safety ↗Construction Cost Context
Manhattan Beach's home addition construction costs run $250–$540 per square foot — a wide range driven by labor markets, local code complexity, and finish level. Our drawings are priced at a fraction of what a full-service architect would charge to produce the same permit set.
⚠ Common Pitfall in Manhattan Beach
Because most Manhattan Beach lots sit within the Coastal Zone, your ADU plans need a Coastal Development Permit on top of the standard Building and Safety review — and if your project isn't exempt (say it's visible from a public viewing corridor or near the Strand), that can tack on another 2-4 months and a separate staff-level review before you even get to plan check. Add in the city's D0 seismic zone requirements, which often mean stamped calculations for soil bearing and shear walls that a generic ADU plan set won't already include, and many homeowners get bounced back for corrections on their first submittal. Also don't assume you can offset costs with a short-term rental — Manhattan Beach explicitly bans STRs in ADUs, so the numbers only work as long-term housing or family use.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, that 12-week permit timeline is a state-level estimate and doesn't account for Manhattan Beach's Coastal Development Permit process, which routinely adds several months once you're in the Coastal Zone — I've seen straightforward ADUs stretch past 6 months once CDP review and any Coastal Commission appeal window come into play. I'd also treat the $/sqft cost figure as a starting point only; get quotes from contractors who've actually pulled ADU permits here recently, since coastal construction and soil conditions can push real numbers well above generic averages."
Market Context
Manhattan Beach has a median home value of $2,400,000. Comparable renovation projects in this market typically add 25% to resale value.
Neighborhoods in Manhattan Beach with the strongest home addition and resale value potential include Mira Costa Area (East Manhattan Beach), Liberty Village, Tree Section, Poets Section, Manhattan Heights. Large 7,500+ sq ft lots, almost entirely single-family homes, and walking distance to Mira Costa High School drive strong year-round rental demand for both staff and student families.
Permit Process
Permit applications are reviewed by the Building and Safety, with a plan check timeline of approximately 12 weeks.
Manhattan Beach falls within Seismic Design Category D0, which affects structural requirements for any new addition tying into the existing structure.
Properties within Manhattan Beach's Coastal Overlay Zone require a Coastal Development Permit in addition to standard building permits.
Local Financing Resources
Local Home Addition Lenders in Manhattan Beach
These lenders offer HELOC, construction, and renovation loans for home addition projects in Los Angeles County. Compare terms before committing.
Operates two Manhattan Beach branches (1120 N. Sepulveda Blvd. and 1440 Rosecrans Ave); offers HELOCs and home equity loans up to $500,000 at fixed or variable rates — local credit union with ADU-applicable equity financing.
Visit Lender ↗Headquartered in Redondo Beach (next-door South Bay neighbor to Manhattan Beach); HELOC indexed to WSJ Prime 8.50% + 0.50% margin, 4.00% floor / 12.00% cap, fixed-rate option to 15 years — well-suited for ADU funding.
Visit Lender ↗California-based bank offering a One-Time Close construction-to-permanent loan with low fixed construction-period rate, 20% down to avoid PMI — available statewide including Manhattan Beach.
Visit Lender ↗Publishes a dedicated 'ADU HELOC' product for California properties; credit lines $10,000–$500,000 (currently 7.250% APR), explicitly designed to fund ADU construction or home renovation.
Visit Lender ↗California-licensed specialty ADU/renovation lender (Renovation Technologies Holdings Inc., NMLS #2412747); factors in the home's after-renovation value so borrowers can finance ADU projects without refinancing their first mortgage.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted Home Addition Contractors in Manhattan Beach
We draw the plans. These contractors build the addition. Independent — no referral fees paid or received.
Build With A Plan provides drawings only. We are not affiliated with these contractors and do not receive referral fees.
Free — No Obligation
What Will Manhattan Beach Let You Add?
Setbacks, lot coverage, and height limits decide your addition before a single line is drawn. Send us the address and we’ll tell you what’s actually approvable — free, before you commit to a design.
- ✓Maximum footprint your lot and setbacks allow
- ✓Lot-coverage and height limits in Manhattan Beach
- ✓Whether your addition triggers structural or energy upgrades
- ✓Realistic plan-check timeline for your project
- ✓A straight answer within 48 hours
Review My Project — Free
Takes 60 seconds. We'll deliver your personalized report within 48 hours.
Request Received
Your feasibility report is being prepared. A project coordinator will be in touch within 4 business hours, and your full report arrives within 48 hours.
Drawing Package Details
What's Included in Your Manhattan Beach Home Addition Package
What You Get
What's in Your Manhattan Beach Home Addition Package
One-time fee, no retainer, no hourly billing — your exact scope and price confirmed on a free call.
- ✓Site plan
- ✓Floor plans (existing + proposed)
- ✓All 4 elevations
- ✓Electrical plan
- ✓Title 24 energy compliance
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Stamped structural drawings
- ✓Foundation plan
- ✓Roof framing plan
- ✓Window & door schedules
- ✓1 round of revisions
- ✓Everything in Standard
- ✓3D rendering
- ✓Cross-section details
- ✓Material specifications
- ✓HOA submission package
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
After You Order
Your Addition Drawings in 3 Steps
Submit Your Project Details
Share your property address, existing floor plan (if available), and the addition scope. We assign your project coordinator within 4 business hours.
We Draft Your Drawings
Our team designs your complete addition drawing set — engineered for Manhattan Beach's building department requirements and CA CBC code. Delivered in 10 business days.
Submit to Your Building Dept
Download your complete package and submit to Building and Safety. We support plan check corrections at no extra charge.
Common Questions
Manhattan Beach Home Addition FAQs
Do I need a permit for a home addition in Manhattan Beach? +
Yes — any structural addition to your home in Manhattan Beach requires a building permit. This applies to room additions, second-story additions, sunrooms, and attached garages. You'll need permit-ready drawings before the building department will accept your application. Our packages are formatted specifically for Manhattan Beach's submittal requirements.
How much does a home addition cost in Manhattan Beach? +
Home additions in Manhattan Beach typically cost between $150–$500 per square foot depending on the scope, finishes, and structural complexity. A 600 sq ft addition ranges from $90,000 to $300,000. Second-story additions cost more than ground-floor extensions due to structural requirements. Contact us to discuss drawing package options for your project.
What drawings are required to permit a home addition in Manhattan Beach? +
Manhattan Beach's building department requires: a site plan showing the addition's footprint and setbacks, floor plans for all affected levels, all four exterior elevations, an electrical plan, and energy compliance (Title 24 in California). Structural plans stamped by a licensed engineer are required for any load-bearing elements — included in our Premium package.
How long does the permit process take for a home addition in Manhattan Beach? +
Plan check in Manhattan Beach typically takes 12 weeks for home additions. Additions with structural components may require additional review. Complete, code-compliant drawings significantly reduce correction cycles — each cycle adds 3–6 weeks. Our drawings are engineered to pass on the first submittal.
What setbacks apply to home additions in Manhattan Beach? +
Manhattan Beach enforces minimum setbacks from property lines for all additions: typically 4–5 ft side setbacks and 5 ft rear setbacks, though these vary by zoning district and lot size. Your addition must stay within the buildable envelope. Our site plan documents existing and proposed setbacks and flags any zoning variances required.
Do I need structural drawings for a home addition in Manhattan Beach? +
Yes, for most additions. Any load-bearing walls, new foundations, second-story construction, or roof structure changes require stamped structural drawings from a licensed engineer. California's CBC (California Building Code) and seismic requirements make structural plans mandatory for most addition types. Our Standard and Premium packages include stamped structural drawings.
How much do home addition drawings cost in Manhattan Beach? +
Our permit-ready home addition drawing packages for Manhattan Beach include everything your building department requires — floor plans, elevations, structural, and energy compliance. Every package is engineered for CA code compliance and formatted for Manhattan Beach's building department. 14-day money-back guarantee.
Will a home addition increase my home's value in Manhattan Beach? +
In Manhattan Beach, where median home values are approximately $2,400,000, a permitted home addition adds square footage that appraisers value as part of the home's gross living area. Return on investment varies by addition type — master suite additions, family room expansions, and additional bedrooms typically recoup 50–75% of project cost in appraised value in CA markets.
Can I add a second story to my home in Manhattan Beach? +
Second-story additions are permitted in most Manhattan Beach residential zones, subject to height limits and design review requirements. California generally requires ministerial permit approval, but some cities impose design compatibility or neighborhood compatibility review for second stories. Our drawings cover all levels including foundation upgrades, shear walls, and roof framing required for vertical additions.
Nearby Cities
Also Available in Manhattan Beach
Adding an ADU instead? See our ADU design service.
Next Steps
Ready to Move Forward With Your Manhattan Beach ADU?
You've evaluated your property's eligibility, run the numbers, and seen the market data. The next step is getting permit-ready architectural drawings to submit to Building and Safety.
Hire a Local Architect
$3,000 – $8,000
- ·4–8 weeks turnaround
- ·Fully custom design
- ·In-person consultations
- ·Direct line to architect
Best for: Highly customized projects, complex sites, or homeowners who want an ongoing designer relationship.
Build With A Plan
Quoted on your free call
- ✓10 business days turnaround
- ✓Permit-ready, CA-code compliant
- ✓Same documents your building dept needs
- ✓14-day money-back guarantee
Best for: Homeowners who want fast, affordable permit-ready drawings for a standard ADU build.
Both options produce permit-ready architectural drawings accepted by Building and Safety. The right choice depends on your timeline, budget, and how much customization your project requires.