Denver's adoption of accessory dwelling unit regulations has created a significant opportunity for homeowners. Whether you want to house an aging parent, generate rental income, or simply add flexible space to your property, an ADU can be a smart investment — if it is designed thoughtfully within the regulatory framework.
The basics: Denver allows ADUs on most residential lots, including detached structures (new construction), attached additions, and interior conversions of existing basements or garages. Maximum size depends on lot size and zoning district, but most lots allow units of 650 to 1,000 square feet. Height limits, setback requirements, and lot coverage calculations constrain the building envelope, and a design review process applies in some historic districts.
From a design perspective, the challenge is making a small building feel spacious, functional, and connected to its site. Every square foot matters. We use strategies like vaulted ceilings, large operable windows, built-in storage, and flexible furniture layouts to make ADUs feel significantly larger than their footprint suggests. Material choices that match or complement the primary residence help the ADU feel like a natural part of the property rather than an afterthought.
The financial case for ADUs is strong. Rental income from a well-designed unit in most Denver neighborhoods ranges from $1,200 to $2,200 per month, and the addition typically increases property value by more than its construction cost. Construction costs for a detached ADU in Denver currently range from $200 to $350 per square foot, depending on finishes and site conditions. We help clients evaluate the financial picture alongside the design to ensure the project makes sense on both fronts.