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LITTLETON SERVICES
Pop-Top Addition in Littleton
Home Addition Feasibility Consultation, $300
See all 2 jobsLicensed pop-top addition services for Littleton and Arapahoe County. Go up, not out — add a full second story.
What Littleton requires
Code reference: Standard IRC Section R105.2 exemptions typically apply (e.g., certain minor non-structural repairs, painting, or very small accessory structures), but Littleton provides no separate local valuation threshold below which permits are automatically waived for remodel/alteration work. §R105.2
See full local requirements ↓- Full Design Lifecycle
- Construction & Tenant Finish
- Smart Home · A/V · Edge Compute
Go up, not out — add a full second story
Jobs you can book online
Pick your job and choose a time.
Pay when you book. We confirm within 24 hours or refund you in full.
Home Addition Feasibility Consultation
We evaluate structure, lot coverage, and zoning for a proposed addition and discuss realistic options.
Pay when you book · morning (8–12) or afternoon (12–4)
What's included
We evaluate structure, lot coverage, and zoning for a proposed addition and discuss realistic options. Includes a one-page feasibility summary with a preliminary budget range.
Addition Feasibility Package
Structural walkthrough, lot coverage and zoning check, and a massing sketch for your proposed addition.
$425 deposit to book, the rest when the work is done · morning (8–12) or afternoon (12–4)
What's included
Structural walkthrough, lot coverage and zoning check, and a massing sketch for your proposed addition. Delivered as a written feasibility report with a preliminary construction budget.
FREE PLANNING TOOLS
Both tools are free and take a couple of minutes — start in either one.
EVERY PROJECT STARTS WITH DESIGN
Local Service
Pop-Top Addition Services in Littleton, Colorado
Autotelic provides professional pop-top addition services throughout Littleton and the surrounding Arapahoe County area. Pop-top second-story additions across the Denver metro — add bedrooms, bathrooms, and living space without expanding your footprint. Structural engineering included. Whether you're in Littleton (historic downtown Littleton) or nearby communities, our team delivers quality workmanship, licensed and insured.
Permits & Licensing
Permits in Littleton
Littleton building permits are issued by the Community Development Department's Building Division and Permit Center, and a license or registration certificate is required to obtain permits for work within city limits. Applications, plan submittals, and inspection scheduling run through the eTRAKiT online system. Authority: City of Littleton — Community Development Department (Building Division / Permit Center).
Permit Thresholds
Littleton permit thresholds
- Code reference
- Littleton has adopted the 2024 International Residential Code (IRC) and other International Codes (with local amendments) under Littleton City Code Title 4, Building Regulations, Chapter 1.
- Code reference
- Standard IRC Section R105.2 exemptions typically apply (e.g., certain minor non-structural repairs, painting, or very small accessory structures), but Littleton provides no separate local valuation threshold below which permits are automatically waived for remodel/alteration work.§R105.2
- Code reference
- Exempt work lists and structural triggers are governed by the adopted 2024 IRC (with amendments) and Littleton’s submittal policies.
- Code reference
- Minor cosmetic or non-structural work (e.g., painting, flooring replacement without affecting structure) is typically exempt under IRC R105.2.
- Building permit fees follow a tiered schedule based on total valuation (e.g., $1
- $25.85; higher tiers add incremental amounts per $100 or $1,000).
- Code reference
- Plan review fee is 65% of the permit fee(s) when blueprints/construction documents are reviewed.
- Code reference
- Use tax deposit = 0.01969 × total job valuation, calculated as ((total job valuation × 52.5%) × 3.75%).
- Code reference
- Arapahoe County Open Space Tax = 0.00125 × total valuation, calculated as ((total job valuation × 50%) × 0.25%).
Codes are amended regularly — verify current requirements with City of Littleton — Community Development Department (Building Division / Permit Center).
Zoning & ADU
Littleton zoning & ADU quick facts
- ACR — Minimum Lot Area
- 2.75 acACR
- ACR — Minimum Lot Width
- 175'ACR
- ACR — Front Setback (min)
- 25'ACR
- ACR — Side Interior Setback (min)
- 20'ACR
- ACR — Side Setback Abutting Street (min)
- 50'ACR
- ACR — Rear Setback (min)
- 50'ACR
- ACR — Lot Coverage (max)
- 17%ACR
- ACR — Building Height (max)
- 30'ACR
Codes are amended regularly — verify current requirements with City of Littleton — Community Development Department (Building Division / Permit Center).
The build sequence for a Pop-Top Addition project
This service is a component of How a Home remodel project works in Littleton.
Energy Code
Littleton energy code quick facts
- Code reference
- 2024 IECC (residential and commercial provisions), as adopted by reference with amendments in Littleton City Code Title 4, Chapter 1 (Ordinance 11, Series 2025). The city also adopts the Colorado Model Electric Ready and Solar Ready Code (June 1, 2023 version).Ord. 11
- Code reference
- Prescriptive R-values/U-factors are unchanged from the 2024 I-codes (no local reductions or increases).
- Code reference
- Littleton is in Climate Zone 5B.
- Code reference
- Alterations/additions to the building thermal envelope (new assemblies, modifications, or change-in-use) must generally meet the new-construction prescriptive requirements below; existing assemblies that are exposed but not modified may be insulated to the greatest extent possible without exceeding
- Code reference
- Some exceptions apply (e.g., storm windows, roof recovers) provided energy use is not increased (amended C503.2 / R503.1.1).
- Ceiling/attic insulation
- R-49 (or R-38 over 100% of the area if uncompressed R-38 extends over the wall top plate at eaves; limited reduction to R-30 allowed for certain roof/ceiling designs up to 500 sf or 20% of ceiling area).
- Adopting reference/ordinance
- 2024 IECC Table R402.1.2 / IRC Table N1102.1.2 (as consolidated in city table, note b/c).
- Wood-framed above-grade walls
- R-20ci only, or R-13cav + R-10ci, or R-20cav + R-5ci, or R-30cav only.
Codes are amended regularly — verify current requirements with City of Littleton — Community Development Department (Building Division / Permit Center).
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What a pop-top covers
A pop-top in the Denver metro raises or replaces the roof on the existing footprint to add a story or habitable attic. Walls usually stay; massing and bulk plane control the envelope. The existing foundation still has to take the new loads. A municipally licensed Denver general contractor coordinates the project, design professionals, and licensed specialty trades. Cost is project-specific and depends on roof structure, stairs, and how much of the first floor is opened.
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Bulk plane, height, and landmarks
Zoning height is measured in feet and stories from the front and rear base planes (DZC Sec. 13.1.2). Plans must show allowed versus proposed bulk plane, including roof overhangs. If the existing house already breaks height or bulk rules, elevations should distinguish retained structure from new work. Landmark Preservation lists pop-top/rooftop additions as a review type; designated properties need Landmark approval before zoning or building permits.
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What buyers should prepare
Target rooms, roof and attic photos, known foundation issues, and landmark or historic-district status.
FAQ
Common questions
How much does Home Addition Feasibility Consultation cost in Littleton?
$300.
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.
Is a pop-top different from a second-story addition?
A pop-top usually stays on the existing footprint and is controlled by bulk plane. A second-story addition may also expand walls. Both need structural review in Denver.
Who handles pop-top permits and licensing?
A municipally licensed Denver general contractor coordinates the project, design professionals, and specialty trades. Colorado has no statewide general contractor license.
Do historic houses need extra review?
Yes. Landmark lists pop-top/rooftop additions. Approval comes before zoning and building permits on designated properties.
What information helps define scope?
Desired rooms, roof photos, landmark status, and city or county.
Service Area
Serving Littleton and Arapahoe County
We serve Littleton, 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 Littleton 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 →Explore
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