Floor Plan Drafting · Simi Valley, CA
Professional Floor Plan Drafting
for Simi Valley, CA Homes
As-built drawings, permit-ready floor plans, and renovation layouts for Simi Valley homeowners, investors, and contractors. Accurate CAD drawings in 10 business days, starting at $997.
14-day money-back guarantee · 10 business day turnaround
Common Uses in Simi Valley
Local Intelligence
What Simi Valley Homeowners Need to Know Before Submitting
Size & Zoning Rules
Accurate floor plans are the foundation of any ADU, garage conversion, or addition permit in Simi Valley — Building & Safety Division will not accept a permit application without them. Simi Valley's current ADU size cap is 1,200 sq ft — generous enough to accommodate most project types.
Simi Valley does not impose an owner-occupancy requirement, so you can rent both the main home and any ADU or conversion as investment units.
Homeowners in Simi Valley who document and legitimize their square footage correctly are positioning a home in a rental market where 1-bedroom units average approximately $2,250/month.
Permit Process & Fees
Building & Safety Division permit fees for this project type typically range from $3,500 to $12,000 depending on project valuation and scope. Plan check runs approximately 7 weeks — though each correction cycle adds 3–6 weeks, which is why code-compliant drawings matter so much.
Floor plans submitted to Building & Safety Division as part of a permit application must include a site plan, floor plans, all four elevations, an electrical plan, and energy compliance documentation — plus if structural changes are involved, a licensed engineer must stamp the structural drawings.
Visit Building & Safety Division ↗Construction Cost Context
Simi Valley's adu / renovation construction costs run $245–$520 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 Simi Valley
Many Simi Valley neighborhoods sit near the Santa Susana fault lines, so the Building & Safety Division routinely kicks back plans that don't include a detailed soils report with specific seismic design values for Zone D/E — this isn't optional paperwork, it's a separate consultant hire that can stall your submittal by 3-4 weeks if you didn't budget for it upfront. Also, several older Simi Valley tracts near the hillside areas (like Wood Ranch) have deed-recorded CC&Rs that restrict detached structures over a certain height, so you'll need to pull the actual recorded HOA documents — not just call the HOA office — because staff often don't know the ADU exemption rules under state law and will wrongly tell you it's not allowed. On top of that, Ventura County's water purveyor for parts of Simi Valley requires a separate will-serve letter for any ADU over 750 sq ft, and getting that letter processed can take longer than the actual city permit review.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, that $350/sqft and 7-week timeline are Simi Valley state-level estimates, not gospel — I'd get at least two local contractor quotes and call the Building & Safety Division directly to check current plan check queues before penciling in a start date. With HOA coverage at 44% in this city, I've also seen architecturally compliant plans stall for months in design review even after the city itself signs off, so don't count that variable out just because it's not in the data."
Market Context
Simi Valley has a median home value of $770,000. Comparable renovation projects in this market typically add 28% to resale value.
Neighborhoods in Simi Valley with the strongest renovation and resale value potential include Central Simi Valley, Wood Ranch, West Simi Valley, Tapo Canyon / Alamo area, Sinaloa Estates / Highlands. High single-family density and many large lots make it top for detached ADUs.
Permit Process
Permit applications are reviewed by the Building & Safety Division, with a plan check timeline of approximately 7 weeks. Permit fees in Simi Valley range from $3,500 to $12,000 depending on project scope.
Simi Valley falls within Seismic Design Category D or E, which affects structural requirements for any new addition tying into the existing structure.
Local Financing Resources
Local Floor Plan Lenders in Simi Valley
These lenders offer HELOC and renovation financing that often requires accurate as-built drawings in Ventura County. Compare terms before committing.
Two Simi Valley branches; HELOC $25K–$500K, 15-yr term, no closing costs on lines ≤$250K if held 36+ months.
Visit Lender ↗Branch at 2680 Tapo Canyon Rd; HELOC up to 75% LTV, variable rate, full home equity suite.
Visit Lender ↗Simi Valley Town Center branch; intro rate 5.99% APR for 6 months, then 7.75%–12.00% APR; no upfront fees ≤$250K.
Visit Lender ↗HQ in Simi Valley; HELOC variable rate, floor 4%, cap 14%, min FICO 680; closing costs from $999 + appraisal.
Visit Lender ↗Simi Valley branch; standard HELOC and construction-to-permanent loans suitable for ADU financing.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted Local Contractors in Simi Valley
Need a contractor once your drawings are ready? These are vetted local options. 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.
What We Deliver
What's Included in Your Simi Valley Floor Plan Package
Transparent Pricing
Simi Valley Floor Plan Packages
One-time fee. No retainer. No hourly billing.
- ✓As-built floor plans (all levels)
- ✓Verified square footage
- ✓Door & window schedule
- ✓Room labels and dimensions
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Electrical layout documentation
- ✓Plumbing fixture locations
- ✓Site plan with setbacks
- ✓Code notations for permit submittal
- ✓1 round of revisions
- ✓Everything in Standard
- ✓Proposed renovation overlay
- ✓3D massing model
- ✓HOA submission package
- ✓Title 24 energy compliance
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
How It Works
Your Floor Plans in 3 Steps
Share Your Home Details
Provide your property address, room measurements, and photos. We'll confirm your order and assign a drafting coordinator within 4 business hours.
We Draft Your Plans
Our CAD team converts your measurements into precise, scaled floor plans — formatted for Simi Valley's building department and CA code standards. Delivered in 10 business days.
Download and Use
Receive your drawings in PDF and DWG format — ready for permit submittal, contractor bidding, listing agents, appraisers, or HOA submission.
Common Questions
Simi Valley Floor Plan Drafting FAQs
When do I need professionally drafted floor plans in Simi Valley? +
You need accurate floor plans for: permit applications (required by Simi Valley's building department for any structural work), refinancing or home equity loans, selling your home (accurate square footage documentation), renovation contractor bidding, HOA design review submissions, and insurance claims. Our as-built drawings capture your home's exact current dimensions.
What is an as-built floor plan and why do I need one in Simi Valley? +
An as-built floor plan documents your home as it currently exists — including all room dimensions, door and window locations, wall thicknesses, and square footage. These are required when the original permit drawings are unavailable or the home was modified without permits. Simi Valley's building department requires accurate as-builts when you apply for renovation or addition permits on older homes.
How much does floor plan drafting cost in Simi Valley? +
Our floor plan drafting packages for Simi Valley start at $997 for a standard residential home. This includes measured floor plans for all levels, room labels, door and window schedules, and verified square footage. Local drafting services typically charge $1,500–$4,000 for the same work. We deliver within 10 business days with a 14-day money-back guarantee.
How do you create floor plans remotely for my Simi Valley home? +
You provide basic measurements (room dimensions, door/window sizes) and photos of each room. Our drafting team converts these into accurate CAD drawings with precise dimensions, wall thicknesses, and notations. For permit-grade as-built drawings, we may request additional measurements or a site visit from a local partner. We serve all Simi Valley neighborhoods remotely.
What format are the floor plan drawings delivered in? +
We deliver drawings in PDF (for printing and permit submission) and DWG/DXF (AutoCAD-compatible format for contractors, engineers, and architects to work from). All drawings are formatted to Simi Valley building department standards and include title block, scale, and code notations required for permit submission.
Can you draft floor plans for a rental property or multi-unit building in Simi Valley? +
Yes — we draft floor plans for single-family homes, duplexes, triplexes, ADUs, condos, and small commercial properties in Simi Valley. Multi-unit buildings are priced based on the total number of units and floors. Contact us for a custom quote if your property has more than 4 units.
Will accurate floor plans increase my home's value in Simi Valley? +
In Simi Valley, where median home values are around $770,000, inaccurate or missing square footage records can suppress list price and appraisal value. Professional as-built drawings establish defensible square footage for appraisers and buyers. Unpermitted additions documented and legitimized through permit drawings can recover thousands in appraised value.
Do I need floor plans to get an ADU or addition permit in Simi Valley? +
Yes — Simi Valley's building department requires accurate floor plans as part of any ADU, garage conversion, or addition permit application. Our packages combine floor plan drafting with the full permit-ready drawing set (site plan, elevations, electrical, Title 24) needed for plan check submittal. If you only need the floor plans themselves, our Starter package covers that.
Can you draft floor plans from old blueprints or photos in Simi Valley? +
Yes — we can redraft from original blueprints, scans of old permit sets, hand-drawn sketches, or room photos combined with your measurements. We regularize old drawings to current CAD standards and update them to reflect any modifications made since original construction. This is a common service for Simi Valley homes built before the 1990s.
Nearby Cities
Also Available in Simi Valley
Planning to build an ADU? See our ADU design service.
Next Steps
Ready to Move Forward With Your Simi Valley 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 & Safety Division.
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
$997 – $2,997
- ✓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 & Safety Division. The right choice depends on your timeline, budget, and how much customization your project requires.