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KEN CARYL SERVICES
Second-Story Addition in Ken Caryl
Licensed second-story addition services for Ken Caryl and Jefferson County. Double your living space without moving.
What Ken Caryl requires
Primary Structure: 35 feet (Jefferson County Zoning Resolution, Section 30, Lot and Building Standards Table) §30
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Local Service
Second-Story Addition Services in Ken Caryl, Colorado
Autotelic provides professional second-story addition services throughout Ken Caryl and the surrounding Jefferson County area. Full second-story additions across the Denver metro with structural engineering, framing, roofing, and complete interior build-out. Commercially licensed and insured. Whether you're in Ken Caryl (southwest Jefferson County) or nearby communities, our team delivers quality workmanship backed by Colorado licensing and full insurance coverage.
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
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).
The build sequence for a Second-Story Addition project
This service is a component of How a Home remodel project works in Ken Caryl.
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).
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What a second-story addition covers
A second-story addition in the Denver metro adds habitable floor over an existing house: new floor structure, stairs, roof, windows, and usually electrical, mechanical, and plumbing. The existing foundation and walls have to carry the extra load. A municipally licensed Denver general contractor coordinates the project, design professionals, and licensed specialty trades. Cost is project-specific and depends on structure, roof, and how much of the first floor is opened.
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Structure and zoning height
City and County of Denver Community Planning and Development treats second-story additions as structural review items that exceed IRC prescriptive limits. The residential permitting guide asks for a letter of structural integrity sealed by a design professional who personally inspected the existing foundation and building (DBCA 133.3). Zoning height is measured in feet and stories from the front and rear base planes (Denver Zoning Code Sec. 13.1.2). Plans should show allowed versus proposed height.
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Permits and who coordinates the work
Additions typically need zoning, building, and Sewer Use and Drainage (SUDP) reviews, plus electrical, mechanical, and plumbing when those systems change. Denver Energy Code Chapter 5 [RE] applies to additions. 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
Target rooms, existing drawings if any, roof and attic photos, and known foundation concerns.
FAQ
Common questions
Do second-story additions need a Denver permit?
Yes. CPD requires building, zoning, and typically SUDP, with structural review because the work exceeds IRC prescriptive limits.
Who handles second-story permits and licensing?
A municipally licensed Denver general contractor coordinates the project, design professionals, and specialty trades. Colorado has no statewide general contractor license.
Can the existing foundation take a second story?
Only after a design professional inspects it. CPD asks for a sealed structural-integrity letter for second-story additions.
How is height measured?
In feet and stories from the zoning front and rear base planes, not just from the sidewalk.
What information helps define scope?
Desired rooms, existing drawings, foundation notes, landmark status, and city or 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.
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 →Let's design your perfect Second-Story Addition together
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