Garage Conversion Drawings · Lone Tree, CO
Permit-Ready Garage Conversion
Drawings for Lone Tree, CO
Convert your garage into permitted living space or a rental unit. We deliver complete,
code-compliant drawing sets ready for Lone Tree's building department — 14-day money-back guarantee.
14-day money-back guarantee · 10 business day turnaround
Local Intelligence
What Lone Tree Homeowners Need to Know Before Submitting
Size & Zoning Rules
Converting your garage to a legal rental unit means the finished space must comply with Lone Tree's ADU size limits. Lone Tree's current ADU size cap is 800 sq ft — within the typical range for most floor plan configurations.
Lone Tree does not impose an owner-occupancy requirement, so you can rent both the main home and any ADU or conversion as investment units.
A fully permitted, code-compliant garage conversion in Lone Tree can command approximately $1,772/month as a 1-bedroom rental — far more than leaving the space as storage.
Permit Process & Fees
Building Division of the City of Lone Tree permit fees for this project type typically range from $2,009 to $3,488 depending on project valuation and scope.
Garage conversion drawings submitted to Building Division of the City of Lone Tree must include a site plan, floor plans, all four elevations, an electrical plan, and energy compliance documentation — plus stamped structural plans are typically required for converted garages that are detached or require seismic upgrades.
Visit Building Division of the City of Lone Tree ↗⚠ Common Pitfall in Lone Tree
Almost every lot in Lone Tree sits inside a Douglas County-approved planned unit development (PUD) with its own HOA design review board, and those boards often have stricter setback and roofline-matching rules than the city's own zoning code — meaning your ADU can meet every city requirement and still get rejected until you resubmit revised elevations to the HOA. Because short-term rentals aren't allowed here, the city will also ask you to sign an affidavit confirming the unit is for long-term family or tenant use, which some lenders want to see before they'll finance the build. On top of that, Lone Tree runs water and sewer through the Willow Creek or Acres Green metro districts depending on your neighborhood, so you'll need a separate tap and service confirmation letter from that specific district before the Building Division will stamp your plans.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, both that timeline and cost-per-square-foot figure are missing here entirely, which tells me they're likely relying on state-level estimates rather than actual Lone Tree data — I'd call the Building Division directly and get two or three local contractor quotes before penciling in a budget or schedule. With HOA coverage this high at 80%, what the data doesn't show is that your HOA's design review can add weeks to your timeline independent of whatever the city quotes you."
Market Context
Lone Tree has a median home value of $780,000. Comparable renovation projects in this market typically add 28% to resale value.
Neighborhoods in Lone Tree with the strongest garage conversion and rental-unit potential include Heritage Hills, Carriage Club, Montecito at RidgeGate, RidgeGate, McArthur Ranch. Gated luxury SFH enclave within walking distance of the Lone Tree light-rail station and Park Meadows, driving strong executive-rental demand.
Permit Process
Permit applications are reviewed by the Building Division of the City of Lone Tree. Permit fees in Lone Tree range from $2,009 to $3,488 depending on project scope.
Lone Tree falls within Seismic Design Category B, which affects structural requirements for converted garage walls and foundations.
Local Financing Resources
Local Garage Conversion Lenders in Lone Tree
These lenders offer HELOC, construction, and renovation loans for garage conversion projects in Douglas County. Compare terms before committing.
Colorado-based credit union financing primary residences, second homes, investment properties, and remodels — usable for ADU construction; also offers a separate Investment Property HELOC up to $250,000 and 75% LTV.
Visit Lender ↗Denver-metro Colorado credit union offering a One-Time Close Construction-to-Permanent loan that streamlines financing for new home construction or renovation projects (ADU-suitable).
Visit Lender ↗Colorado credit union HELOC starting as low as 6.25% variable with a 10-year draw period and 15-year repayment, plus an Interest-Only HELOC option — usable to fund ADU builds.
Visit Lender ↗Colorado community bank offering construction financing up to 80% of project costs (up to 90% with mortgage insurance on construction-to-permanent) with flexible terms and lot equity counted toward down payment.
Visit Lender ↗Colorado-based bank offering a Single-Close Construction Loan with 5/1, 7/1, and 10/1 ARM or fixed-rate (5/7/10-year) options, designed to streamline financing through construction.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted Garage Conversion Contractors in Lone Tree
We draw the plans. These contractors build the conversion. 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
Can Your Lone Tree Garage Legally Become Living Space?
Not every garage qualifies. Send us the address and we’ll check ceiling height, setbacks, parking-replacement rules, and what Lone Tree will actually permit — before you spend anything.
- ✓Whether your garage meets Lone Tree conversion rules
- ✓Parking-replacement requirements that catch most owners out
- ✓Ceiling height, egress, and fire-separation checks
- ✓What the finished space could rent for
- ✓A straight answer within 48 hours
Check My Garage — 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 Lone Tree Garage Conversion Package
What You Get
What's in Your Lone Tree Garage Conversion Package
One-time fee, no retainer, no hourly billing — your exact scope and price confirmed on a free call.
- ✓Site plan
- ✓Floor plans
- ✓All 4 elevations
- ✓Electrical plan
- ✓CO energy code form
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Structural plans (stamped)
- ✓Cross-section details
- ✓Window & door schedules
- ✓Material specifications
- ✓1 round of revisions
- ✓Everything in Standard
- ✓3D rendering
- ✓HOA submission package
- ✓ADU conversion alt plan
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
After You Order
Your Conversion Drawings in 3 Steps
Submit Your Garage Details
Share your property address, garage dimensions, and intended use (ADU, rental, home office). We confirm your order and assign your project coordinator within 4 business hours.
We Draft Your Drawings
Our team designs your complete conversion drawing set — engineered for Lone Tree's building department requirements and CO code. Delivered in 10 business days.
Submit to Your Building Dept
Download your complete package and submit to Building Division of the City of Lone Tree. We support plan check corrections at no extra charge.
Common Questions
Lone Tree Garage Conversion FAQs
Is a garage conversion allowed in Lone Tree? +
Yes — garage conversions are permitted in Lone Tree. Colorado state law allow homeowners to convert an attached or detached garage into habitable living space or an ADU. A building permit and permit-ready drawings are required before work begins.
How much does a garage conversion cost in Lone Tree? +
Garage conversions in Lone Tree typically range from $100,000 to $220,000 depending on the existing structure, finish level, and scope of work. This is significantly less than building a new detached ADU. Contact us to discuss drawing package options for your project.
What drawings are required to permit a garage conversion in Lone Tree? +
Lone Tree's building department requires: a site plan showing the converted garage's location on the lot, floor plans with dimensions and room labels, all four exterior elevations, an electrical plan, and energy compliance documentation (the 2021 IECC (Colorado's statewide-mandated minimum)). Our Starter package covers all of these. If the garage is detached or the structure requires seismic upgrades, stamped structural drawings are also required — included in our Premium package.
How long does the permit process take for a garage conversion in Lone Tree? +
Plan check in Lone Tree typically takes approximately 6 weeks. Having complete, code-compliant drawings dramatically reduces correction cycles — which each add 3–6 weeks. Our drawings are designed to pass on the first submittal.
Can I convert my garage into a rental unit in Lone Tree? +
Yes — a permitted garage conversion can function as a standalone rental unit (an ADU, or a similar accessory-unit category depending on Colorado's and Lone Tree's local rules). It can be rented long-term. Short-term rental rules vary by city — confirm with Lone Tree's planning department.
Do I need to replace the garage door opening when converting? +
Yes. The garage door must be replaced with an insulated wall with a standard entry door and at least one egress window (minimum 5.7 sq ft clear opening). This is captured in our elevation drawings and flagged in the electrical plan. The new wall must also meet CO energy code requirements, which we handle in the CO energy code compliance documentation.
How much does it cost to get garage conversion drawings in Lone Tree? +
Our permit-ready garage conversion drawing packages for Lone Tree include floor plans, elevations, electrical, and energy compliance — everything your building department needs. Every package is engineered for CO code compliance and formatted for Lone Tree's building department. 14-day money-back guarantee.
Will converting my garage increase my home's value in Lone Tree? +
A permitted garage conversion in Lone Tree adds rentable square footage to a home currently valued around $780,000. Converted spaces typically appraise as habitable square footage, increasing the home's value. As an ADU or JADU, the rental income stream is also capitalized into the appraised value — typically at a 5–6% cap rate.
Nearby Cities
Also Available in Lone Tree
Need full ADU design drawings instead?
Next Steps
Ready to Move Forward With Your Lone Tree 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 of the City of Lone Tree.
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 Division of the City of Lone Tree. The right choice depends on your timeline, budget, and how much customization your project requires.