Floor Plan Drafting · Brentwood, CA
Professional Floor Plan Drafting
for Brentwood, CA Homes
As-built drawings, permit-ready floor plans, and renovation layouts for Brentwood homeowners, investors, and contractors. Accurate CAD drawings with a 14-day money-back guarantee.
14-day money-back guarantee · permit-ready delivery
Common Uses in Brentwood
Local Intelligence
What Brentwood Homeowners Need to Know Before Submitting
Size & Zoning Rules
Accurate floor plans are the foundation of any ADU, garage conversion, or addition permit in Brentwood — Community Development Department will not accept a permit application without them. Brentwood's current ADU size cap is 1,000 sq ft — within the typical range for most floor plan configurations.
Brentwood 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 Brentwood who document and legitimize their square footage correctly are positioning a home in a rental market where 1-bedroom units average approximately $2,192/month.
Permit Process & Fees
Community Development Department permit fees for this project type typically range from $4,000 to $15,000 depending on project valuation and scope. Plan check runs approximately 12 weeks — though each correction cycle adds 3–6 weeks, which is why code-compliant drawings matter so much.
Floor plans submitted to Community Development Department 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 Community Development Department ↗Construction Cost Context
Brentwood's adu / renovation construction costs run $180–$440 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 Brentwood
If your property is within a Brentwood HOA, expect additional friction during the design phase, as many HOAs enforce architectural consistency rules that go beyond city requirements, potentially delaying approval by weeks or months. Additionally, ADUs over 750 sqft trigger school district impact fees that can add $3.50–$4.14 per square foot, which often surprises homeowners budgeting for smaller units. On older properties, utility upgrades—especially sewer line replacements—are common due to Brentwood's aging infrastructure, often adding $10,000–$15,000 to the project cost.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience filing ADU plans in Brentwood, that 12-week timeline and the per-square-foot cost figure are both state-level averages, not verified local numbers — I'd get quotes from at least two Brentwood-experienced contractors and call the Community Development Department directly before penciling out a budget or schedule. And don't overlook that HOA hitting 50% of properties here; even with no coastal overlay to worry about, an HOA architectural review can quietly add weeks that never show up in these timeline estimates. — Charlotte Pemberton, Senior ADU Design Consultant"
Market Context
Brentwood has a median home value of $760,000. Comparable renovation projects in this market typically add 25% to resale value.
Neighborhoods in Brentwood with the strongest renovation and resale value potential include Prewett Ranch, Garin Ranch, Shadow Lakes, Apple Hill, Sand Creek. Large-lot contemporary single-family homes ideal for detached ADUs with strong family-renter demand near Downtown Brentwood jobs.
Permit Process
Permit applications are reviewed by the Community Development Department, with a plan check timeline of approximately 12 weeks. Permit fees in Brentwood range from $4,000 to $15,000 depending on project scope.
Brentwood falls within Seismic Design Category D, which affects structural requirements for any new addition tying into the existing structure.
Local Financing Resources
Local Floor Plan Lenders in Brentwood
These lenders offer HELOC and renovation financing that often requires accurate as-built drawings in Contra Costa County. Compare terms before committing.
Has a Brentwood branch at 5601 Lone Tree Way and offers a specifically-named ADU Line of Credit (short-term HELOC): $10,000–$400,000, variable starting at 8.25% APR, 2-year interest-only draw / 20-year repayment, allows up to 125% CLTV and considers projected ADU rental income.
Visit Lender ↗Operates a Brentwood branch at 121 Sand Creek Rd and offers fixed-rate home equity loans and variable HELOCs nationwide for ADU/rehab financing, with fixed rates in a published range of approximately 8.24%–10.74% APR.
Visit Lender ↗Bay Area credit union serving the 925 area code (which includes Brentwood/Contra Costa County); offers California's-only HELOC limits with lines up to $200,000, up to 70% CLTV, 25-year term, no application or annual fees — usable for ADU construction or renovation on a primary residence.
Visit Lender ↗Northern California credit union offering construction loans of $50,000–$2,000,000 with future-value (as-completed) qualification — explicitly supports ADU builds by allowing qualification on the home's post-completion value rather than current value.
Visit Lender ↗National specialty ADU/renovation fintech that arranges loans through its credit-union partner network (including California credit unions); the RenoFi Loan is built around as-completed value, letting borrowers tap roughly 11x more equity than a traditional HELOC — accessible statewide including Contra Costa County (loans are arranged through partner CUs, not directly by RenoFi).
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 Brentwood
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.
Free — No Obligation
Tell Us What You Need Drawn
As-built documentation, permit plans, or a renovation layout — send us the property and what it’s for, and we’ll confirm scope and turnaround free before any commitment.
- ✓Confirmation of exactly which drawings your permit needs
- ✓Verified dimensions and square footage
- ✓Door, window, and fixture schedules
- ✓Turnaround confirmed up front — 10 business days standard
- ✓A straight answer within 48 hours
Get My Project Reviewed — 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.
What We Deliver
What's Included in Your Brentwood Floor Plan Package
What You Get
Brentwood Floor Plan Packages
One-time fee, no retainer, no hourly billing — your exact scope and price confirmed on a free call.
- ✓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 Brentwood'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
Brentwood Floor Plan Drafting FAQs
When do I need professionally drafted floor plans in Brentwood? +
You need accurate floor plans for: permit applications (required by Brentwood'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 Brentwood? +
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. Brentwood'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 Brentwood? +
Our floor plan drafting packages for Brentwood cover 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 comparable work. Contact us for current pricing and to discuss your project. 14-day money-back guarantee.
How do you create floor plans remotely for my Brentwood 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 Brentwood 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 Brentwood 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 Brentwood? +
Yes — we draft floor plans for single-family homes, duplexes, triplexes, ADUs, condos, and small commercial properties in Brentwood. 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 Brentwood? +
In Brentwood, where median home values are around $760,000, 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 Brentwood? +
Yes — Brentwood'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 Brentwood? +
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 Brentwood homes built before the 1990s.
Also Available in Brentwood
Planning to build an ADU? See our ADU design service.
Next Steps
Ready to Move Forward With Your Brentwood 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 Community Development Department.
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 Community Development Department. The right choice depends on your timeline, budget, and how much customization your project requires.