What are the zoning regulations and permitting requirements for building an ADU in Denver, Colorado?

Zoning regulations and permitting requirements for building an ADU in Denver, Colorado, typically include restrictions on size, setbacks, height, and parking. Permits are usually required from the city's planning department, and compliance with building codes is essential.

What are the typical costs associated with constructing an ADU in Denver, including permits, materials, and labor?

The costs associated with constructing an ADU in Denver vary depending on factors such as size, materials, labor rates, and site conditions. On average, homeowners can expect to spend between $100,000 and $300,000 for a detached ADU, including permits and construction.

Are there any specific design guidelines or architectural styles that need to be followed when building an ADU in Denver?

Denver may have specific design guidelines or architectural styles that homeowners need to follow when building an ADU. These guidelines often focus on ensuring compatibility with the existing neighborhood character, including factors such as building materials, roof pitch, and exterior finishes.

How does adding an ADU affect property taxes and home insurance rates in Denver?

Adding an ADU can impact property taxes and home insurance rates in Denver. The increase in property value due to the addition of an ADU may result in higher property taxes. Homeowners should also notify their insurance provider about the addition of an ADU to ensure adequate coverage.

What are the advantages and disadvantages of building a detached ADU versus an attached ADU in Denver?

The decision between building a detached ADU versus an attached ADU in Denver depends on factors such as lot size, privacy preferences, and budget. Detached ADUs offer more privacy and flexibility in design but may require more space and be subject to stricter zoning regulations. Attached ADUs may be more cost-effective and easier to integrate into existing structures but may have limitations on layout and design.

The Sublevel Suite Airbnb

ADURenovationBasement Finishes

Apr 25

Written By Rachel Nagy

A34 | Project Summary

Located in Denver’s sought-after City Park neighborhood, this basement renovation project showcases how smart design can turn even the most challenging spaces into high-performing short-term rentals. Originally a shallow and underutilized area, the sublevel was thoughtfully reimagined by NAGY Design into a stylish, code-compliant Airbnb suite—without expanding the home’s existing footprint.

By maximizing every inch of space, this lower-level ADU now includes all the essentials: a cozy sleeping area, full bathroom, kitchenette, laundry, and a comfortable living space. The transformation enhances the homeowner’s rental income potential while preserving the character and architectural integrity of the original home.

This creative basement conversion is a testament to how strategic space planning and intentional design can unlock hidden value in older Denver homes—especially in historic neighborhoods like City Park.

If you are interested in hiring us and our trusted team of experts to renovate your unfinished basement into a polished Airbnb… Let’s Talk!

995 sq. ft

City Park, Denver

PrenValley Builders

6 Months

ADU | RENOVATION

Signature Design Process

- Site analysis
- Existing conditions
- Budgeting
- Code review
- Contractor interviews negotiation
- Basic design concept generation
- 1-2 Iterations on a theme design evolution
- Plan approval to move forward to construction documents
- Detailed drawings
- 1 Major edit allowed
- Finish selection
- Permit comments
- Minimum of 3-5 site visits during construction
- Ensure the follow-through of the original design intent

Sublevel ADU and Airbnb floor plan designed by NAGY Design in City Park, Denver, featuring a full bath, kitchenette, laundry, and private guest suite layout

Architectural Services

Unfinished Basement Renovation

Two Bedroom Floor Plan

Small Kitchenette

Entertaining Space

Maintain Owner’s Laundry

Hotel-Style Double Vanity

ADU | RENOVATION

Common Questions

Zoning regulations and permitting requirements for building an ADU in Denver, Colorado, typically include restrictions on size, setbacks, height, and parking. Permits are usually required from the city's planning department, and compliance with building codes is essential.
The costs associated with constructing an ADU in Denver vary depending on factors such as size, materials, labor rates, and site conditions. On average, homeowners can expect to spend between $100,000 and $300,000 for a detached ADU, including permits and construction.
Denver may have specific design guidelines or architectural styles that homeowners need to follow when building an ADU. These guidelines often focus on ensuring compatibility with the existing neighborhood character, including factors such as building materials, roof pitch, and exterior finishes.
Adding an ADU can impact property taxes and home insurance rates in Denver. The increase in property value due to the addition of an ADU may result in higher property taxes. Homeowners should also notify their insurance provider about the addition of an ADU to ensure adequate coverage.
The decision between building a detached ADU versus an attached ADU in Denver depends on factors such as lot size, privacy preferences, and budget. Detached ADUs offer more privacy and flexibility in design but may require more space and be subject to stricter zoning regulations. Attached ADUs may be more cost-effective and easier to integrate into existing structures but may have limitations on layout and design.