Home Addition Drawings · Broomfield, CO
Permit-Ready Home Addition
Drawings for Broomfield, CO
Expand your home with a permitted room addition, second story, or family room extension. We deliver complete, code-compliant drawing sets for Broomfield's building department — in 10 business days, starting at $1,497.
14-day money-back guarantee · 10 business day turnaround
Local Intelligence
What Broomfield Homeowners Need to Know Before Submitting
Size & Zoning Rules
Any new square footage added to your Broomfield home counts against the same zoning envelope that governs ADU size, meaning large additions may affect your ability to add a future ADU. Broomfield's current ADU size cap is 800 sq ft — within the typical range for most floor plan configurations.
Broomfield 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, Broomfield's ADU market supports approximately $2,166/month for a 2-bedroom unit.
Permit Process & Fees
Building Division permit fees for this project type typically range from $2,200 to $8,500 depending on project valuation and scope. Plan check runs approximately 6 weeks — though each correction cycle adds 3–6 weeks, which is why code-compliant drawings matter so much.
Addition permit packages submitted to Building Division 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 Division ↗Construction Cost Context
Broomfield's home addition construction costs run $157–$220 per square foot — a moderate 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 Broomfield
Because Broomfield operates as a combined city-county, your ADU application actually gets routed through both municipal planning review and Broomfield County records, and if your legal description or plat hasn't been updated since the city-county split, you'll hit a title discrepancy that stalls permit intake until it's corrected. The Building Division also requires a separate tap fee study for water and sewer if your lot was platted before 1990, since many older Broomfield subdivisions were built with utility lines sized only for the primary residence. Because short-term rentals aren't allowed here, some lenders financing the ADU will ask for a letter from the city confirming long-term rental intent before they'll release construction draws.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, that $225/sqft figure and the 6-week plan check timeline read like Colorado state-level averages rather than numbers pulled from Broomfield's actual permit desk, so I'd call the Building Division directly and get two or three local contractor quotes before penciling those into your budget. What the data doesn't show is that a 6-week estimate assumes a clean, complete drawing set on first submittal — with the 35% HOA prevalence here, I've seen plenty of projects add 3-4 weeks just from HOA review running parallel to the city's process."
Market Context
Broomfield has a median home value of $510,000. Comparable renovation projects in this market typically add 23% to resale value.
Neighborhoods in Broomfield with the strongest home addition and resale value potential include North Broomfield, Broadlands, Ridgeview Heights, Country Estates, Willow Run. Very large lots and proximity to St. Anthony North Hospital and I‑25 make it ideal for detached ADUs and rentals.
Permit Process
Permit applications are reviewed by the Building Division, with a plan check timeline of approximately 6 weeks. Permit fees in Broomfield range from $2,200 to $8,500 depending on project scope. Design review: Yes - in historic districts only.
Broomfield falls within Seismic Design Category Seismic Design Category B (ASCE 7), which affects structural requirements for any new addition tying into the existing structure.
Local Financing Resources
Local Home Addition Lenders in Broomfield
These lenders offer HELOC, construction, and renovation loans for home addition projects in Broomfield County. Compare terms before committing.
Offers fixed-rate home equity loans and HELOC products (rates advertised from ~7.99% on fixed products); serves Boulder/Northern Colorado region including Broomfield area.
Visit Lender ↗Home Equity ChoiceLine combines HELOC flexibility with fixed-rate options; available to Bellco members across metro Denver (typical line sizes depend on equity).
Visit Lender ↗Offers both standard and variable-rate HELOCs with longer terms; serves Colorado members (metro Front Range including Broomfield).
Visit Lender ↗Local Colorado credit union (Aurora) offering flexible HELOCs suitable for ADU financing; local underwriting and competitive local service.
Visit Lender ↗Specialty ADU lender/platform that partners with credit unions to offer ADU/renovation loans (typical RenoFi loan sizes range from tens of thousands up to $500k+ depending on partner).
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 Broomfield
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.
Drawing Package Details
What's Included in Your Broomfield Home Addition Package
Transparent Pricing
Broomfield Home Addition Drawing Packages
One-time fee. No retainer. No hourly billing.
- ✓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 Broomfield's building department requirements and CO CBC code. Delivered in 10 business days.
Submit to Your Building Dept
Download your complete package and submit to Building Division. We support plan check corrections at no extra charge.
Common Questions
Broomfield Home Addition FAQs
Do I need a permit for a home addition in Broomfield? +
Yes — any structural addition to your home in Broomfield 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 Broomfield's submittal requirements.
How much does a home addition cost in Broomfield? +
Home additions in Broomfield typically cost between $175.0–$300 per square foot depending on the scope, finishes, and structural complexity. A 600 sq ft addition ranges from $105,000 to $180,000. Second-story additions cost more than ground-floor extensions due to structural requirements. Our drawing packages start at $1,497 — a fraction of local architectural fees.
What drawings are required to permit a home addition in Broomfield? +
Broomfield'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 Broomfield? +
Plan check in Broomfield typically takes 6 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 Broomfield? +
Broomfield 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 Broomfield? +
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 Broomfield? +
Our permit-ready home addition drawing packages for Broomfield start at $1,497. Local architects and designers typically charge $3,000–$10,000+ for comparable drawing sets. Every package is engineered for CO code compliance and formatted for Broomfield's building department. Turnaround is 10 business days with a 14-day money-back guarantee.
Will a home addition increase my home's value in Broomfield? +
In Broomfield, where median home values are approximately $510,000, 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 CO markets.
Can I add a second story to my home in Broomfield? +
Second-story additions are permitted in most Broomfield 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 Broomfield
Adding an ADU instead? See our ADU design service.
Next Steps
Ready to Move Forward With Your Broomfield 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 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 Division. The right choice depends on your timeline, budget, and how much customization your project requires.