Accessory Structures in Loveland, CO: What Residents Actually Need to Know

If you live in Loveland or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Loveland has 5 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

Garage Conversions

Converting a Loveland garage to habitable living space requires a building permit and electrical permit from Loveland Building Division under the 2021 International Residential Code (change of occupancy from U to R-3). If the conversion creates a kitchen and a separate entrance, the result is an Accessory Dwelling Unit under Loveland UDC Title 18, which is permitted as-of-right (one ADU per single-family lot) under Colorado HB 24-1152 with size caps of 75% of the primary dwelling or 900-1,200 sq ft depending on lot size.

Key details: Building Permit: Required (change of occupancy). Electrical / Mechanical / Plumbing: Separate permits for each. Building Code: 2021 IRC (Loveland Title 15). Ceiling Height: 7 ft minimum (IRC R305). Egress Windows: 5.7 sq ft, 24 in H, 20 in W (IRC R310).

Building without permits triggers Loveland Building Division stop-work orders, double permit fees, and possible removal orders. Creating an unpermitted second dwelling unit (kitchen + separate entrance) without ADU approval is a zoning violation enforced by Loveland Current Planning under UDC Title 18, Part 4 with notice of violation, daily civil penalties, and stop-use orders.

ADU Rules

Loveland updated its Accessory Dwelling Unit regulations to comply with Colorado HB 24-1152 (effective June 30, 2025), which mandates that subject Front-Range jurisdictions allow at least one ADU as an accessory use to every single-unit detached dwelling through an administrative approval process. Loveland permits one ADU per single-family lot, capped at 75% of the primary dwelling's floor area or 900-1,200 sq ft (depending on lot size). Capital expansion fees are waived. Owner-occupancy cannot be required and parking is generally not required.

Key details: Code Reference: Loveland UDC Title 18 (ADU provisions) + CO HB 24-1152 / CRS 29-32-101. State Mandate: Colorado HB 24-1152 effective June 30, 2025. Maximum Per Lot: 1 ADU per single-family detached lot. Size Cap (lots <=15,000 sf): 75% of primary OR 900 sq ft, whichever is smaller. Size Cap (lots 15K-100K sf): 75% of primary OR 1,000 sq ft, whichever is smaller.

Building or occupying an ADU without permits triggers Loveland Building Division stop-work orders, double permit fees, and possible removal orders enforced under Title 15 building code. Creating an unpermitted second dwelling unit (kitchen + separate entrance) without ADU approval is a zoning violation enforced by Loveland Current Planning under UDC Title 18, Part 4 with notice of violation, daily civil penalties, and stop-use orders. Note: any Loveland regulation requiring owner-occupancy, subjective design review, or off-street parking solely because of the ADU is unenforceable under Colorado HB 24-1152.

Loveland is more permissive than most cities when it comes to adu rules. That said, there are still limits.

Tiny Homes

Loveland regulates tiny homes through dwelling type. Tiny homes on a permanent foundation (Tiny House on a Foundation / THoF) are governed by the 2021 International Residential Code (IRC) Appendix Q as adopted in Loveland Municipal Code Title 15 - dwellings of 400 sq ft or less qualify for relaxed ceiling-height, loft, and stair standards. Tiny Houses on Wheels (THoW) are treated as recreational vehicles and generally cannot be used as permanent residences in Loveland residential zones. After Colorado HB 24-1152 (effective June 30, 2025), a permanently foundation-mounted tiny home may qualify as an ADU on a single-family lot subject to the 900-1,200 sq ft ADU size caps.

Key details: Tiny House on Foundation (THoF): Governed by 2021 IRC Appendix Q (verify local adoption). Tiny Home Size Threshold: <=400 sq ft (Appendix Q applies). Loft Headroom (Appendix Q): 3 ft 6 in clear vertical space. Tiny House on Wheels (THoW): Classified as RV - cannot be permanent residence in residential zone. ADU Pathway (post-HB 24-1152): Permanent-foundation tiny home may qualify as ADU.

Installing a tiny home without a building permit triggers Loveland Building Division stop-work orders and double permit fees under Title 15. Using a Tiny House on Wheels (RV) as a permanent residence in a residential zone is a zoning violation enforced by Loveland Current Planning under UDC Title 18, Part 4 with notice of violation, daily civil penalties, and stop-use orders. Using a tiny home as an unpermitted second dwelling unit (without ADU approval) is a separate zoning violation.

Shed Rules

Loveland UDC Title 18 treats sheds and similar detached accessory structures as accessory uses subject to residential-zone setback standards - typically 5 ft from side and rear property lines, with the structure required to sit behind the principal dwelling. The 2021 International Residential Code (IRC) as adopted by Loveland in Title 15 exempts one-story detached residential accessory structures up to 200 sq ft (with no plumbing, electrical, or mechanical systems) from a building permit. Larger sheds, or any shed with electrical service, require a building permit through Loveland Building Division.

Key details: Code Reference: Loveland UDC Title 18 (zoning) + Title 15 (building code, 2021 IRC). Side / Rear Setback: 5 ft minimum (typical residential zones). Corner Lot Street-Side: 10 ft minimum. Behind Principal Building: Required (front-yard sheds prohibited). Height Cap: Not to exceed principal dwelling.

Building without a required permit triggers Loveland Building Division stop-work orders, double permit fees, and possible removal orders under Title 15. Setback and dimensional violations are enforced by Loveland Current Planning under UDC Title 18, Part 4 with notice of violation, daily civil penalties, and removal orders. Floodplain violations are enforced under the Loveland floodplain ordinance and FEMA NFIP rules.

If you are coming from a city with tighter rules, you will find Loveland gives residents more flexibility on shed rules.

Carport Rules

Loveland UDC Title 18 treats detached carports as accessory structures subject to residential-zone setbacks - typically 5 ft from side and rear property lines, with the carport required to sit behind the front building line of the principal dwelling. Attached carports follow the principal-building setbacks of the underlying zoning district. A building permit is required through Loveland Building Division under the 2021 International Residential Code with engineered wind-uplift anchorage for the Larimer County 115 mph basic wind speed.

Key details: Code Reference: Loveland UDC Title 18 + Title 15 (2021 IRC). Detached Carport Side/Rear Setback: 5 ft minimum (typical residential). Attached Carport Setbacks: Principal-building setbacks for the zone. Front-Yard Carport: Generally prohibited (must be behind front building line). Corner Lot Street-Side: 10 ft minimum.

Building without a required permit triggers Loveland Building Division stop-work orders, double permit fees, and possible removal orders under Title 15. Setback and dimensional violations are enforced by Loveland Current Planning under UDC Title 18, Part 4 with notice of violation, daily civil penalties, and removal orders. An improperly anchored carport that fails in a wind event creates liability and may trigger insurance denial.

Loveland is more permissive than most cities when it comes to carport rules. That said, there are still limits.

The Bottom Line

Compared to many U.S. cities, Loveland gives residents more room on accessory structures. 3 of the 5 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

All of the above reflects Loveland's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.