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Garage Conversion in Lone Tree
Licensed garage conversion services for Lone Tree and Douglas County. Turn your garage into livable space.
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- Construction & Tenant Finish
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Local Service
Garage Conversion Services in Lone Tree, Colorado
Autotelic provides professional garage conversion services throughout Lone Tree and the surrounding Douglas County area. Garage to living space conversions across the Denver metro — studios, offices, guest suites, and ADUs with full HVAC, insulation, and code-compliant egress. Whether you're in Lone Tree (Park Meadows and RidgeGate) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.
Permit Thresholds
Lone Tree permit thresholds
- Code reference
- This aligns with the adopted 2021 International Residential Code (IRC) and amendments (along with other 2021 I-Codes and the 2023 National Electrical Code), as set forth in the City’s municipal code Chapter 18 (Building Regulations).
- Building
- Fences under 7 feet tall; retaining walls under 4 feet; concrete walks, patios, and driveways; painting; swings/playground equipment; same-size window replacements (like-for-like size; changing opening size requires a permit).
- Code reference
- Re-roofing generally requires a permit when replacing more than 1 square (100 sq ft).
- Code reference
- Emergency repairs allow a 24-hour grace period to apply.
- Code reference
- No use tax, building permit valuation-based tax, or similar rate (with or without a basis such as “applied to X% of valuation”) is specified in Lone Tree’s publicly available building department materials.
Codes are amended regularly — verify current requirements with **The City of Lone Tree Building Division (part of the City of Lone Tree Community Development Department) issues residential building permits.
Zoning & ADU
Lone Tree zoning & ADU quick facts
- Code reference
- The most common single-family residential districts in Lone Tree, Colorado, are the SR-E (Estate), SR-L (Low-Density), and SR-M (Moderate-Density) subzoning districts within the SR Suburban Residential District (Lone Tree Municipal Code Sec. 16-2-10).Sec. 16-2-10
- Code reference
- Specific numeric development standards (e.g., maximum lot coverage %, maximum building height, ADU maximum size, or detailed setbacks for additions/ADUs/garages) for these districts are not available in publicly searchable sources, including Municode Chapter 16 excerpts, city PDFs, or related docume
- Code reference
- Standards for accessory buildings/uses, including setbacks, are addressed in sections such as Sec. 16-7-310 (setbacks for accessory uses in SR-E, SR-L, and SR-M), but exact figures are not extractable from available materials.Sec. 16-7-310
- Code reference
- ADU regulations are referenced in third-party summaries (e.g., only one ADU per lot; height limited to the primary residence or 25 feet, whichever is less; size limits of ~50% of primary for attached/internal and ~40% for detached), but these lack direct citations to Lone Tree code sections and cann
- Code reference
- ADUs are generally treated as accessory uses in residential districts where single-family dwellings are permitted, consistent with broader Colorado guidance, but local permitting, size, and placement details require direct consultation with the City of Lone Tree planning/zoning staff or the full Mun
- Code reference
- For precise, current standards applicable to a specific property (including any PUD overlays, which are common in Lone Tree), refer to the official Lone Tree Municipal Code Chapter 16 (Zoning) via Municode or contact the City directly, as standards may be site-specific or updated via ordinance.
Codes are amended regularly — verify current requirements with **The City of Lone Tree Building Division (part of the City of Lone Tree Community Development Department) issues residential building permits.
Energy Code
Lone Tree energy code quick facts
- Code reference
- 2021 International Energy Conservation Code (IECC) with local amendments (per City of Lone Tree Municipal Code Chapter 18, adopted via Ordinance No. 22-07, Series of 2022).Ordinance No. 22-07
- Code reference
- Lone Tree (Douglas County, climate zone 5B) adopts the 2021 IECC by reference with amendments as part of its building regulations.
- Code reference
- State law (HB 22-1362 and related provisions) requires jurisdictions updating building codes to adopt at least the 2021 IECC plus the Colorado Model Electric Ready and Solar Ready Code (with amendments that cannot reduce stringency).
- Code reference
- Key prescriptive requirements relevant to remodels/additions (drawn from the base 2021 IECC for CZ 5B, as specific local numeric energy amendments are not detailed in available municipal sources beyond the general adoption; confirm with the Building Division for exact local tweaks):
- Wall insulation
- R-20 or 13+5 ci (continuous insulation) for wood-frame walls (2021 IECC Table R402.1.2 or equivalent prescriptive path).
- Ceiling/attic insulation
- R-49 (2021 IECC Table R402.1.2).
- Air leakage/air-sealing
- ≤ 3 ACH50 (air changes per hour at 50 Pascals) with blower-door testing required for verification (2021 IECC R402.4; state baseline aligns with this).
- Fenestration U-factor
- Maximum 0.30 for windows (or as per prescriptive table; SHGC requirements also apply in CZ 5).
Codes are amended regularly — verify current requirements with **The City of Lone Tree Building Division (part of the City of Lone Tree Community Development Department) issues residential building permits.
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What garage conversion covers
Garage conversions in the Denver metro turn an attached or detached garage into conditioned living space or, where zoning allows, an accessory dwelling unit. Work typically includes insulation, new openings, electrical, HVAC, and often a bath or kitchen. Parking on the lot still has to satisfy zoning. A municipally licensed Denver general contractor coordinates the project and licensed specialty trades. Cost is project-specific and depends on attached versus detached, ADU versus extra rooms, and how much of the envelope changes.
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Occupancy, energy code, and ADUs
Turning an unconditioned garage into a bedroom is a change of space conditioning. Denver Energy Code Chapter 5 [RE] treats that as a change of occupancy or use and applies addition/new-construction energy rules to the newly conditioned space. Creating a separate ADU is a different zoning path: the district must allow an accessory dwelling unit, and plans must clearly label the ADU and the primary structure. Transportation review is listed for ADUs, garages, and increases in dwelling units.
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Permits and who coordinates the work
City and County of Denver Community Planning and Development requires architectural and structural review for occupancy or use changes, plus zoning, building, and typically SUDP. Exterior changes on landmarks or in historic districts need Landmark review. Cities and counties license general contractors. Colorado has no statewide general contractor license. Autotelic acts as a municipally licensed Denver general contractor and coordinates licensed specialty trades plus the design professionals required for the project.
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What buyers should prepare
Attached versus detached, living space versus ADU, whether a bath or kitchen is included, and how parking will be handled.
FAQ
Common questions
Does converting a garage need a Denver permit?
Yes. It is a change of occupancy or use. CPD requires building and zoning review, and typically SUDP.
Who handles garage conversion permits and licensing?
A municipally licensed Denver general contractor coordinates the project, design professionals, and specialty trades. Colorado has no statewide general contractor license.
Is extra living space the same as an ADU?
No. Extra rooms for the main house stay one dwelling. An ADU is a separate dwelling and is only allowed in districts that permit it.
Does energy code apply to a cold garage?
Yes once it becomes conditioned. Denver Energy Code uses turning an unconditioned garage into a bedroom as an example of a change of space conditioning.
What information helps define scope?
Attached vs detached, ADU vs extra rooms, parking plan, and city or county.
Service Area
Serving Lone Tree and Douglas County
We serve Lone Tree, CO and all surrounding Denver metro communities. Our team is based in Denver and operates throughout the Front Range, from Castle Rock to Longmont and everywhere in between. Contact us for a free estimate on your Lone Tree project.
How It Runs
01
Survey
02
Design
03
Build
04
Verify
DESIGN SERVICES
Discovery & Site Analysis
Needs + preference programming, site survey, as-built documentation, feasibility.
We walk, measure, and photograph your property — existing conditions, utilities, structure, and constraints. You get the as-built documentation and feasibility read that every later decision rests on.
Learn more →Concept Design & Space Planning
Schematic design, floor plan studies, layout options.
Your scope becomes schematic floor plans you can compare side by side — circulation, daylight, adjacencies, and what each option does to the budget. Layout decisions happen on paper, where changes are cheap.
Learn more →Architectural Design & 3D Renderings
Design development, materials + finishes, photorealistic visualization.
The chosen concept resolves into materials, finishes, fixtures, and lighting — with the automation layer drawn in. Photorealistic renderings let you walk the space and adjust before anything is priced.
Learn more →Construction Documents & Permitting
Full CD sets, structural + MEP engineering coordination, permit-ready drawings.
Approved designs become coordinated architectural, structural, and MEP sheets — the set your jurisdiction permits from and trades build from. We submit, track, and answer review comments.
Learn more →CONSTRUCTION
New Construction & Custom Homes
Ground-up homes and light commercial, dirt to keys.
Ground-up residential and light commercial builds — foundations through finishes, including modular and steel construction. One accountable builder from dirt to keys.
Learn more →Remodels & Additions
Kitchens, baths, basements, pop-tops, whole-home.
Kitchens, baths, basements, pop-tops, and whole-home renovations that respect the house you already have. We handle structure, permits, and the dust.
Learn more →Commercial Tenant Finish & Build-Outs
Shells to working spaces — retail, office, restaurant, school.
Raw shells become working spaces — showrooms, offices, restaurants, schools. Dealer-spec finishes, code compliance, and opening dates held.
Learn more →ADUs & Modular Construction
Backyard cottages, garage conversions, factory-built homes.
Backyard cottages, garage conversions, and factory-built homes — zoning, design, permits, and set. Denver’s ADU rules are a specialty, not a surprise.
Learn more →Outdoor Living & Patio Structures
Decks, pergolas, and dining patios built for Colorado weather.
Decks, pergolas, and dining patios engineered for Colorado sun, snow, and hail — structure, shade, and drainage done right the first time.
Learn more →TECHNOLOGY
Smart Home Automation
Lighting, shades, climate, audio, security — one interface.
Whole-home control of lighting, shades, climate, audio, and security from a single interface — Crestron, Lutron, Savant, and Control4 designed in, not bolted on.
Learn more →A/V Systems
Theaters, distributed audio, video walls, commercial sound.
Theaters, distributed audio, video walls, and commercial sound — designed, installed, and tuned by the same team for over 20 years.
Learn more →Control Systems
Custom programming — scenes and schedules that fit the space.
Every subsystem brought into one elegant interface — custom programming for homes and venues, with scenes and schedules that match how the space is actually used.
Learn more →Networking & Edge Compute
Enterprise Wi-Fi, structured cabling, racks, on-prem compute.
Enterprise-grade Wi-Fi, structured cabling, racks, and on-premise compute — the backbone that makes everything else reliable, including our own Barbot platform.
Learn more →Solar & Energy Storage
Solar arrays, Tesla Powerwall, EV charging — certified install.
Solar arrays, Tesla Powerwall, and EV charging designed and installed by a Tesla Energy Certified team — roof, electrical, and app in one scope.
Learn more →TRUSTED TO BUILD FOR
- Punch Bowl SocialFirst four locations
- Spectrum RetirementSenior living communities
- Denver HighlandsFirst modular custom home
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