Covered porch on a completed home addition on the Front Range
Lone Tree, Colorado · Design-Build

Lone Tree additions, remodels and bathroom renovations.

Design-build across Lone Tree — additions, whole-home remodels, bathrooms, kitchens and structural work, designed to the Planned Development your address actually sits in.

Lone Tree, Colorado

In Lone Tree, your setbacks are not in the municipal code. They are in your PD plan.

Lone Tree is largely Planned Development, and the code explicitly lets a PD modify almost any standard in the zoning chapter. The city publishes seventeen separate Planned Development documents — RidgeGate, Heritage Hills, Park Meadows, Carriage Club, Meridian, Lone Tree Town Center, Westbrook, Willow Creek and others. For most Lone Tree addresses the setbacks and height that govern your project come out of that document, not out of Chapter 16.

Planned Development zoning17 PD documents — yours is one of themSection 16-2-170 allows a Planned Development to include regulations for, and modifications from, the zoning chapter — dedication requirements, variance standards and procedures, site and master plans, parking standards, sign standards and more. The city publishes 17 separate PD documents. Identifying which one governs your address is genuinely the first step on a Lone Tree project.
Accessory-structure height10 feet by right, 20 with Director approvalThis one catches people. Under Section 16-7-110(a)(2) an accessory building is limited to 10 feet by right, and 20 feet only with Community Development Director approval. That is unusually tight and it directly governs detached garages, studios and any detached accessory building. Principal buildings in the SR districts are capped at 35 feet.
Codes and design criteria2021 IRC, 2023 NEC, in-house reviewLone Tree is on the 2021 IRC and amendments with the 2023 NEC, and the Building Division runs plan review and inspections in-house — not Douglas County, not a contracted third party. Submittal is electronic through Accela as one unlocked editable PDF. Design criteria: roof snow load 30 psf, wind 115 ULT Exposure C, Seismic Design Category B, 36-inch frost depth, winter design temperature −3°F.
Two things worth knowingNo published review times, and a code rewrite comingLone Tree does not publish building permit review times — the five-working-day figure you may find applies to Public Works permits only, and it would be a false promise to apply it to a building permit. Separately, a Unified Development Code rewrite is underway, drafting December 2026 to August 2027 with adoption late 2027. Chapter 16 from January 2022 remains operative until then.

Verified against official City of Lone Tree and Colorado Department of Local Affairs sources as of August 2026. Code editions and ADU rules change, and several Front Range jurisdictions are mid-revision right now. Treat this as the starting point for your project, not as legal advice, and confirm the current standard with the Lone Tree Building Division on 720-390-5211 before you commit to a design. We do that on every job as a matter of course.

Built Here

A Lone Tree bathroom remodel.

Completed exterior of a home renovated by our design-build team on the Front Range

Lone Tree Bathroom Remodel

A full bathroom renovation in Lone Tree — layout, structure and services resolved together rather than finishes applied over an old plan.

Straight Answers

Lone Tree questions we get asked.

What are the setbacks on my Lone Tree lot?

That depends which Planned Development you are in, and for most Lone Tree addresses the answer is not in the municipal code. Section 16-2-170 lets a PD modify almost any standard in the zoning chapter, and the city publishes 17 separate PD documents including RidgeGate, Heritage Hills, Park Meadows, Carriage Club, Meridian, Lone Tree Town Center, Westbrook and Willow Creek. Identifying and reading the governing PD is the first step on any Lone Tree project. RidgeGate stacks further still – the 7th Amendment PD District plus the East Villages and City Center sub-area plans on top of the comprehensive plan.

How tall can a detached garage or studio be in Lone Tree?

Ten feet by right, and 20 feet only with Community Development Director approval, under Section 16-7-110(a)(2). That is unusually tight and it is the rule that most often reshapes a detached accessory building here. Principal buildings in the SR districts are capped at 35 feet. Note that your PD may modify these, which is why we read it first.

How long does a Lone Tree building permit take?

Lone Tree does not publish building permit review times, and we will not invent one. You may find a five-working-day figure on the city site – that applies to Public Works permits only, and applying it to a building permit would be a false promise. What is published is the fee structure: plan review at 65 per cent of the permit fee with a $100 minimum, and additional review caused by changes at $100 per hour with a two-hour minimum. Submittal is electronic through Accela.

Completed covered porch on a home addition on the Front Range
Start Yours

Bring us the house you already love.

We will find the Planned Development that governs your lot, read what it actually allows, and tell you honestly what it takes. It starts with a short phone consult, not a sales visit.

Prefer to talk now? Call (720) 637-2060

Get your free project estimate

A few quick questions on our secure estimate page — about 2 minutes. We call you back the same business day to talk it through.

Start My Free Estimate