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ADU Construction · La Plata County, Colorado
Permit required
In Colorado, a ADU Construction requires a building permit.
An accessory dwelling unit (ADU) always requires a building permit because it adds a habitable dwelling, including electrical, plumbing, mechanical permits and egress/zoning review. Plans are reviewed under the Local (home rule) code (IRC 2021); apply through La Plata County Building Inspctn before work begins.
Source: Local (home rule), IRC 2021 · Verified 2026 by StateDataIndex
Building an Accessory Dwelling Unit requires complex zoning, structural, and utility permits.
With a population of around 56,331 residents, La Plata County generally runs a more streamlined permitting process than major urban hubs.
Code Compliance & Inspections
Because of severe winter weather in Colorado, any exterior structures or footings must be set below the local frost line to prevent shifting, as mandated by the Colorado Building Code.
Local Zoning & Setbacks in La Plata County
Regardless of the state permit rule above, La Plata County still enforces property-line setbacks and local zoning for your ADU Construction. A permanent foundation or any electrical/plumbing hookup can also change what is required, so confirm with La Plata County Building Inspctn before building.
Zoning & Cost Factors
Colorado is a "home rule" state, meaning local municipalities have almost complete autonomy over zoning and building codes, leading to massive variations between counties. Fortunately, Colorado maintains relatively builder-friendly regulations, keeping base permit fees competitive.
Permit fees in La Plata County
Permit fees vary by jurisdiction and by your project's valuation, so there is no single fixed figure for La Plata County. We only publish fees confirmed by real homeowners — none have been reported here yet.
Confirm the current fee directly with La Plata County Building Inspctn ((970) 382-6250). If you have paid for a permit here, you can add it here to help others.
La Plata County Building Department
Office: La Plata County Building Inspctn
Address: 211 Rock Point Dr, Durango, CO 81301, USA
Phone: (970) 382-6250
Source: official La Plata County government records. Hours and procedures can change — call ahead to confirm.
How to Apply in La Plata County
In La Plata County, you can begin your application online through the county's permit portal, or submit blueprints and a property survey in person. Including your contractor's Local County/City Licensing Office license number helps avoid rejections.
ADU Construction Requirements in La Plata County
Typical Submittal Package
When applying for a ADU Construction permit, you or your contractor will generally need to submit the following documentation for the city's review:
- Comprehensive architectural and structural plans
- Foundation engineering reports
- Sewer, water, and utility connection plans
- Site plan showing property lines and setbacks
Standard Ordinances & Processing Time
Key code points for a ADU Construction in La Plata County: ADUs typically have maximum square footage limits (often 800-1200 sq ft), height restrictions, and usually require dedicated off-street parking depending on local zoning.
Typical processing time for a jurisdiction of this size: 10 to 14 business days.
Frequently Asked Questions
What happens if I build a ADU Construction without a permit in La Plata County?
Building without authorization is considered a code violation. The local government can issue a Stop Work Order, forcing you to halt construction immediately. You may be subject to retroactive permit fees (often double the original cost), daily fines, or even a mandate to tear down the unpermitted work at your own expense.
Can a homeowner pull their own ADU Construction permit in Colorado?
Yes. Colorado generally allows property owners to act as their own general contractor under an Owner-Builder exemption. If you take this route, you assume full legal and financial liability and must ensure all work complies with the Colorado Building Code.
How much does a ADU Construction permit cost in La Plata County?
Permit fees vary by jurisdiction and by your project's valuation, so La Plata County does not publish a single fixed figure. Confirm the exact fee with the local building department before applying.
How long does it take to get a ADU Construction permit in La Plata County?
Based on the size of La Plata County, the typical processing time is 10 to 14 business days. Times vary with the season and the building department application volume.
Where do I apply for a ADU Construction permit in La Plata County?
You can apply through the La Plata County Building Inspctn or online via the county permit portal. For questions, call (970) 382-6250.
Help the La Plata County Community
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Read GuideBuilding It Yourself? Here's What You'll Need
Planning an ADU? Tools homeowners use in the design and layout phase:
📘
Backyard ADU Design Guide (Book)
View on Amazon →
📐
Laser Level
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🔍
Franklin ProSensor Stud Finder
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📏
25ft Tape Measure
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Other Permit Types in La Plata County
Planning another home improvement project? Check the requirements and fees for:
Nearby Jurisdictions in Colorado
Building near the county line? Check requirements for neighboring areas: