In 2026, Denver’s zoning laws for Accessory Dwelling Units (ADUs) require homeowners to adhere to specific dimensional and occupancy standards. The city generally allows ADUs in most residential zones (R-0 through R-4), provided the property meets the following criteria:
- Lot Size Requirements: Attached ADUs require a primary lot size of at least 5,000 square feet, while detached structures (such as garage conversions) require a minimum lot of 6,000 square feet.
- Height and Setbacks: Detached ADUs are capped at a maximum height of 24 feet. All setbacks must align with the requirements of the underlying zone for the primary residence.
- Parking: The city mandates one off-street parking space, though exemptions may apply if the property is located in a reduced-parking zone or near high-frequency transit.
- Owner Occupancy: Denver requires owner occupancy for at least one of the units on the property for the first three years after the conversion.
- Permitting Process: All projects must be submitted through the Denver ePermits portal. The application must include a site plan, floor plan, elevations, energy calculations, and a signed owner-attestation form.
Related FAQs
-
Do Black Windows Fade Faster than White Windows in High-sun Areas like Colorado?
Read More »: Do Black Windows Fade Faster than White Windows in High-sun Areas like Colorado?In Colorado’s high-altitude climate, black window frames do tend to absorb more solar heat and UV radiation compared to white frames, which naturally reflect sunlight. Because Colorado sits at an average elevation above 5,200 feet, the intense UV exposure can…
-
Are Marvin Infinity Fiberglass Windows Worth the Investment?
Read More »: Are Marvin Infinity Fiberglass Windows Worth the Investment?Yes, Marvin Infinity fiberglass windows are widely considered a premier investment for Colorado homeowners due to their exceptional durability and energy efficiency in high-altitude environments. Because fiberglass expands and contracts at nearly the same rate as glass, these windows maintain…
-
How do Marvin Infinity Windows Compare to Pella Fiberglass?
Read More »: How do Marvin Infinity Windows Compare to Pella Fiberglass?When evaluating Marvin Infinity alongside Pella Fiberglass options, the decision typically centers on long-term durability, design versatility, and specific material performance. Both brands offer high-quality fiberglass solutions that outperform vinyl in Colorado’s intense climate, but they differ in their proprietary…
-
How do I Install Smart Water Detection in a Remodeled Basement?
Read More »: How do I Install Smart Water Detection in a Remodeled Basement?Integrating smart water detection is a critical step in safeguarding your investment and protecting newly finished walls, flooring, and furnishings from costly damage. During a basement remodeling project, we focus on a risk-reduction approach that provides early warnings through your…
-
What Smart Technology is Essential for Finished Basements in 2026?
Read More »: What Smart Technology is Essential for Finished Basements in 2026?To create a future-ready finished basement in 2026, we recommend a connected ecosystem that prioritizes protection, comfort, and seamless connectivity. Essential technologies include: As a design-build firm, we provide single-point accountability to ensure these systems are integrated during the rough-in…
