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KEN CARYL SERVICES

Ken Caryl ADU / backyard cottage — local feasibility & estimate

ADU Feasibility Consultation, $350

Compare both studies

Exploring a backyard ADU in Ken Caryl? Autotelic helps assess feasibility against lot, setbacks, HOA, and local rules—then provides a clear estimate and build path with one team. No fake zoning envelopes. No invented prices or license claims.

What Ken Caryl requires

Primary Structure: 35 feet (Jefferson County Zoning Resolution, Section 30, Lot and Building Standards Table) §30

See full local requirements ↓
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ADU / Backyard Cottage

Build an income-producing unit in your backyard

Book an ADU feasibility study

Two fixed-price studies, booked online before you pay for design: a site visit with a go/no-go read on your lot, or a written report you can take to a lender.

Pay when you book. We confirm within 24 hours or refund you in full.

  • ADU Feasibility Consultation

    An on-site review of your lot against local ADU zoning, setbacks, and utility access.

    Pay when you book · morning (8–12) or afternoon (12–4)

    What's included

    An on-site review of your lot against local ADU zoning, setbacks, and utility access. You get a verbal go/no-go read plus a one-page summary of constraints and next steps.

  • ADU Feasibility Package

    Site visit plus a written feasibility report: local ADU zoning check, buildable envelope sketch, utility routing notes, and a preliminary budget.

    $475 deposit to book, the rest when the work is done · morning (8–12) or afternoon (12–4)

    What's included

    Site visit plus a written feasibility report: local ADU zoning check, buildable envelope sketch, utility routing notes, and a preliminary budget. A documented go/no-go you can take to a lender.

Studies for additions, custom homes and commercial space

FREE PLANNING TOOLS

Both tools are free and take a couple of minutes — start in either one.

Local Service

ADU / Backyard Cottage Services in Ken Caryl, Colorado

Autotelic provides professional ADU / backyard cottage services throughout Ken Caryl and the surrounding Jefferson County area. Accessory dwelling unit construction across the Denver metro — detached new builds, garage conversions, and basement conversions compliant with Colorado HB 24-1152. One veteran-owned design-build team runs the full Denver sequence under a single contract: zoning verification and concept design, municipal zoning and building permit reviews, then construction and inspections through certificate of occupancy. Whether you're in Ken Caryl (southwest Jefferson County) or nearby communities, our team delivers quality workmanship, licensed and insured.

Permit Thresholds

Ken Caryl permit thresholds

Code reference
Jefferson County adopted the 2024 International Codes and Supplements, which became effective on July 1, 2026.
Code reference
A building permit is typically required for residential remodel work in Jefferson County under the adopted building codes, which include the 2024 International Residential Code (IRC) and its supplements.
Code reference
Additions over 400 square feet may trigger additional reviews for access, water, wastewater, and fire district service.
Code reference
Decks that are over 12 inches off the ground require a permit.
Garages and Barns
Permits are required for garages, home additions, and barns over 200 square feet.
Sheds and Mini-Structures
Sheds, shipping containers, and mini-structures 120 square feet or less require a Miscellaneous Permit.
Code reference
However, if a structure (regardless of size) is within 10 feet of an occupied structure, it requires a Building Permit.
Code reference
A Building Permit is also required for all structures over 120 square feet or over 14 feet tall.

Codes are amended regularly — verify current requirements with **Jefferson County (specifically its Building Division/Planning & Zoning functions) issues residential building permits for Ken Caryl, CO (an unincorporated community/CDP in Jefferson County).

Zoning & ADU

Ken Caryl zoning & ADU quick facts

Code reference
The most common single-family residential districts include Residential-One (R-1), Restricted Residential (RR), Mountain Residential (MR), and Suburban Residential (SR) districts.
Code reference
Specific maximum lot coverage percentages for the R-1, RR, MR, and SR districts are not explicitly detailed in the provided summaries of the Jefferson County Zoning Resolution.
Code reference
An older version of the Jefferson County Zoning Ordinance (1969) indicated a maximum lot coverage of 25% for the "Residential One District" for the main building and all accessory buildings.
Code reference
However, the Zoning Resolution has undergone significant revisions, including major updates in 2013 and 2026.
Primary Structure
35 feet (Jefferson County Zoning Resolution, Section 30, Lot and Building Standards Table)§30
Accessory Structure
Not to exceed the lesser of the height of the primary structure or 25 feet.
Code reference
(Jefferson County Zoning Resolution, Section 30, Lot and Building Standards Table, Footnote 1)§30
Primary Structure
45 feet (Jefferson County Zoning Resolution, Section 31, Lot and Building Standards Table)§31
§30

Codes are amended regularly — verify current requirements with **Jefferson County (specifically its Building Division/Planning & Zoning functions) issues residential building permits for Ken Caryl, CO (an unincorporated community/CDP in Jefferson County).

A recent build

Backyard ADU in Denver

Denver · 2026

Status
Under construction — 2026
Managed on
Buildbot — Autotelic’s own PM platform
  • Architecture, site plans, and full MEP design completed in-house
  • Permits pulled — electric and plumbing rough-ins permitted and underway
  • Spray-foam insulation and exterior work in progress
  • First project managed end-to-end on Buildbot, Autotelic’s construction-PM platform

A ground-up backyard ADU in Denver — designed, permitted, and now under construction by Autotelic, and the first project managed end-to-end on Buildbot, Autotelic’s own construction-management platform.

Energy Code

Ken Caryl energy code quick facts

Code reference
Jefferson County has adopted the 2024 International Energy Conservation Code (IECC), along with the 2024 State Model Electric Ready and Solar Ready Code, effective July 1, 2024.
Code reference
Previously, the 2018 IECC was in effect until June 30, 2024.
Code reference
Unincorporated Jefferson County is designated as Climate Zone 5 for energy code purposes.
Code reference
For residential remodels and additions, compliance can be achieved through a prescriptive path, simulated building performance, or the Energy Rating Index (ERI) option, as outlined in the 2024 IECC.
Code reference
The prescriptive path for the building envelope requires information to be taken from various tables using Zone 5 requirements from the 2024 IECC.
Code reference
While Jefferson County's documentation refers generally to these requirements, specific numerical values for the 2024 IECC would typically be found directly within the code document's Chapter 4 (Residential Energy Efficiency) or Chapter 5 (Existing Buildings).
Code reference
Based on the general prescriptive requirements for Climate Zone 5 in the 2024 IECC (which Jefferson County has adopted):
Ceiling Insulation (Attic)
R-49 insulation for ceilings with attics.

Codes are amended regularly — verify current requirements with **Jefferson County (specifically its Building Division/Planning & Zoning functions) issues residential building permits for Ken Caryl, CO (an unincorporated community/CDP in Jefferson County).

Service Area

Serving Ken Caryl and Jefferson County

We serve Ken Caryl, 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 Ken Caryl project.

FAQ

ADU feasibility FAQ

How much does ADU Feasibility Consultation cost in Ken Caryl?

$350.

How do I book?

Press Book next to the job, pick a date and a morning (8–12) or afternoon (12–4) window, and pay in full. We confirm within 24 hours or refund you in full.

Can I build an ADU on my lot?

It depends on lot size, setbacks, HOA rules, and Ken Caryl’s code. Autotelic helps assess feasibility—we do not invent zoning envelopes or guarantee permit outcomes.

Is the online sizing tool a permit determination?

No. Lot-aware sizing on /adu/ is illustrative only and is not a permit determination. A clear estimate and local review come next.

What happens after I start an estimate?

You move from feasibility into a clear estimate with the same design-build team, then permit coordination and build with a licensed Denver-metro crew when you proceed.

What will an ADU cost?

The lot lookup is free. Our ADU cost page shows planning ranges for a detached backyard cottage; your lot, utility connections and finishes affect the price. Start an estimate for your project, or call (720) 287-7958 to talk it through. A fixed-price build proposal comes after feasibility.

How long does an ADU project take?

First we check your lot and agree on the scope. Then come design and drawings, city permit review, and construction with inspections. Your lot, utility connections, design changes and the city’s review schedule affect the timing. Your proposal includes a project-specific schedule before you commit to the build. A consultation booking is the first planning conversation, not a construction start date.

Who builds the ADU?

Autotelic’s local design-build team takes your project from the first concept through an estimate, permits and construction. You have one team to talk to along the way.

Do you handle ADU permits and inspections?

Yes — ADU permitting is municipal, and we manage zoning review, permit application, and every inspection through certificate of occupancy.

Detached, attached, or garage conversion — which is right?

Each has different zoning, cost, and site implications. We design all three and recommend based on your lot, budget, and how you plan to use the unit.

How small a lot can support an ADU?

Smaller than most people assume — many Front Range single-unit lots that owners write off can carry a detached unit, and each city sets its own minimum lot size, setbacks, and building coverage. Whether your district’s standards leave room for a backyard cottage — or point you toward a garage or basement conversion instead — is exactly what the feasibility check answers for your address.

What is the ADU permit process?

Two municipal reviews run in order: a zoning review confirming the unit fits your district’s standards, then a building permit review of the construction documents, with inspections during the build and a certificate of occupancy at the end. Colorado HB 24-1152 now requires most Front Range municipalities to allow ADUs on single-unit lots, and we confirm how your city implements it as the first step of feasibility.

How It Runs

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Survey

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Design

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Build

04

Verify

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