Floor Plan Drafting · Longmont, CO
Professional Floor Plan Drafting
for Longmont, CO Homes
As-built drawings, permit-ready floor plans, and renovation layouts for Longmont 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 Longmont
Local Intelligence
What Longmont Homeowners Need to Know Before Submitting
Size & Zoning Rules
Accurate floor plans are the foundation of any ADU, garage conversion, or addition permit in Longmont — Building Services Department will not accept a permit application without them. Longmont's current ADU size cap is 800 sq ft — within the typical range for most floor plan configurations.
Longmont 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 Longmont who document and legitimize their square footage correctly are positioning a home in a rental market where 1-bedroom units average approximately $1,495/month.
Permit Process & Fees
Building Services Department permit fees for this project type typically range from $5,000 to $10,000 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.
Floor plans submitted to Building Services 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 Building Services Department ↗Construction Cost Context
Longmont's adu / renovation construction costs run $200–$280 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 Longmont
Longmont's Building Services Department requires a separate sewer tap fee study for most ADUs, since many older lots (especially in the original townsite grid) were platted with single-service lines that can't legally support a second unit without upsizing — this often means an unexpected $4,000-$9,000 tap fee plus a utility locate delay before your permit even gets scheduled for review. On top of that, Boulder County's shared floodplain mapping along the St. Vrain corridor catches more lots than homeowners expect, so if you're anywhere near Fairgrounds Park or the older north-side neighborhoods, plan on an extra elevation certificate step that generic ADU guides never mention. Since STRs are allowed citywide, expect your neighbors to get a mailed notice during permit review — and in practice, that notice period is when most design changes get demanded, not after construction starts.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, that $220/sqft and 6-week timeline are Longmont state-level estimates, not gospel — I'd get quotes from two or three local contractors and call the Building Services Department directly before penciling in a budget or start date. I've also seen plenty of "6-week" submittals stretch to 10+ weeks once a plan set comes back with corrections, so build in a cushion, especially if you're relying on that STR income to pencil out the project financially. — Charlotte Pemberton"
Market Context
Longmont has a median home value of $508,000. Comparable renovation projects in this market typically add 23% to resale value.
Neighborhoods in Longmont with the strongest renovation and resale value potential include Loomiller, Longmont Estates, Sunset, McIntosh, Central Business District (Downtown). Established single-family lots close to downtown make Loomiller ideal for detached ADUs.
Permit Process
Permit applications are reviewed by the Building Services Department, with a plan check timeline of approximately 6 weeks. Permit fees in Longmont range from $5,000 to $10,000 depending on project scope. Design review: Yes - in historic districts only.
Longmont falls within Seismic Design Category Seismic Design Category B, which affects structural requirements for any new addition tying into the existing structure.
Local Financing Resources
Local Floor Plan Lenders in Longmont
These lenders offer HELOC and renovation financing that often requires accurate as-built drawings in Boulder County. Compare terms before committing.
Offers HELOCs with variable APRs (rates shown starting at 6.99%) and has branches serving Longmont.
Visit Lender ↗Provides land & construction loans including construction-to-permanent options with locally underwritten terms in Colorado.
Visit Lender ↗Offers construction-to-permanent and renovation loans (Fix-It First) to finance building or renovating projects in Colorado, with branch in Longmont.
Visit Lender ↗HELOCs for home renovations with maximum loan amounts cited (example: up to $500,000 / up to 90% CLTV on some products).
Visit Lender ↗Fintech platform (not a direct lender) that partners with credit unions nationwide to offer renovation/ADU financing; check local credit unions for RenoFi-backed products.
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 Longmont
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 Longmont Floor Plan Package
Transparent Pricing
Longmont 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 Longmont's building department and CO 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
Longmont Floor Plan Drafting FAQs
When do I need professionally drafted floor plans in Longmont? +
You need accurate floor plans for: permit applications (required by Longmont'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 Longmont? +
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. Longmont'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 Longmont? +
Our floor plan drafting packages for Longmont 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 Longmont 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 Longmont 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 Longmont 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 Longmont? +
Yes — we draft floor plans for single-family homes, duplexes, triplexes, ADUs, condos, and small commercial properties in Longmont. 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 Longmont? +
In Longmont, where median home values are around $508,000, 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 Longmont? +
Yes — Longmont'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 Longmont? +
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 Longmont homes built before the 1990s.
Nearby Cities
Also Available in Longmont
Planning to build an ADU? See our ADU design service.
Next Steps
Ready to Move Forward With Your Longmont 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 Services 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
$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 Services Department. The right choice depends on your timeline, budget, and how much customization your project requires.