Building permits, zoning and land rules in Deer Lodge County, Montana

Yes. Anaconda-Deer Lodge County requires building permits throughout the county, and new residential construction cannot begin until the paperwork is final and the physical permit has been obtained¹. The county's certified building-code program is residential-only⁸. Electrical, plumbing and mechanical permits and inspections belong to the Montana Department of Labor and Industry rather than the county Building Inspector⁹. Montana exempts an owner working on the owner's property from the construction-contractor licensing chapter in qualifying circumstances, but that exemption does not waive building, trade or inspection requirements⁷. The permit holder must notify the inspector when work is ready and provide access, but the complete county inspection sequence and any general certificate-of-occupancy requirement could not be confirmed; ask the Building Inspector before scheduling work^10,11.

The Anaconda-Deer Lodge County Building Inspector is the local building-permit contact at 406-563-4011, in the A-DLC Courthouse, First Floor, 800 Main Street, Anaconda, MT 59711¹¹. Planning, reached at 406-563-4010 in the same courthouse, posts the building, development and demolition applications⁶. A new-home application needs an Administrative Development Permit and a full plan set from a registered design professional or engineer; the departments require at least two weeks to review a complete application and plans¹². Residential building fees are published, including a plan-review charge equal to 25% of the building-permit fee¹. Because the local certified program is residential-only, ask the Building Inspector where to file a nonresidential project⁸.

Yes. Anaconda-Deer Lodge County's Development Permit System acts as zoning throughout the county through development districts, rather than one uniform set of dimensional standards^13,14. Use the ADLC Planning Map to identify the parcel's district, then read that district's regulations in the Development Permit System². In the Opportunity Development District, new or expanded principal and accessory structures have a 35-foot front setback and 10-foot side and rear setbacks, subject to any superseding stream-bank or environmental standard¹⁵. The same district has a 2.5-acre minimum lot size and requires 50 feet of lot width at the building setback line¹⁵. In the East Valley Development District, new or expanded structures have a 35-foot front setback and 10-foot side and rear setbacks¹⁵. The Opportunity Development District also lists single-family dwellings, including Class A and Class B manufactured homes, at one unit per lot of record, subject to an Administrative Development Permit¹⁶. Montana law requires county zoning to allow at least one accessory dwelling unit by right on a lot with a single-family dwelling¹⁷. Those district figures do not apply countywide, and a countywide minimum dwelling size, lot coverage or building height could not be confirmed; ask Planning for the mapped district's standards⁶.

Tri-County Environmental Health requires a permit to construct, alter or repair an individual onsite wastewater system in Deer Lodge County⁴. Applications must document the property, site plan, nearby wells and drainfields, surface water, slopes, soils and groundwater; the fee is paid to the treasurer in the county where the property lies⁴. Septic application fees are $100 with a certified installer and $150 with an uncertified installer, with separate charges for some evaluations, repeat inspections and other services⁴. Systems installed by non-certified installers must be inspected; certified installers may self-inspect but are asked to give 24 hours' notice before burial, and an as-built drawing is due within 30 days after installation⁴. Septic permits stay with Tri-County Environmental Health, separate from the county building permit and from the Montana Department of Labor and Industry trade permits^4,9. Only about 9% of county soils are rated without severe limits for a conventional drain field, so establish feasibility before fixing the house site¹⁸. If an approved public sewer is readily available within 200 feet of the property line and the system operator approves, wastewater must connect to it unless connection is unavailable or economically impractical⁵.

We could not confirm a countywide rule for long-term RV occupancy, temporary camping on private land or tiny-home occupancy in Deer Lodge County; ask Planning how the parcel's development district treats the proposed unit before buying land or moving it onsite⁶. Montana's camping limit for Fish, Wildlife & Parks sites does not answer private-land occupancy¹⁹. Property with human occupancy that is not served by municipal sewer needs wastewater facilities approved by Tri-County Environmental Health⁴. A tiny home may also trigger the countywide building-permit process, so take its plans and specifications to both Planning and the Building Inspector^6,9. We also could not confirm a countywide minimum dwelling size; Planning should confirm it and the manufactured-home rule for the mapped district⁶.

1. Identify the development district on the Planning Map and confirm its rules with Planning².

1. Prepare the Administrative Development Permit and a full plan set from a registered design professional or engineer¹².

1. Resolve septic, well and subdivision-sanitation review with Tri-County Environmental Health; a county well permit is required for well drilling^1,3,5.

1. Ask whether the construction site needs a driveway approach permit; when applicable, it is a prerequisite to building-application approval¹.

1. Submit the complete building application and fees, allowing at least two weeks for review^1,12.

1. Obtain the physical permit before construction, then give the required notice for inspections¹.

Start with buildability, not the asking price. Only about 9% of Deer Lodge County soils are rated without severe limitations for a conventional septic drain field, while about 39.4% of the land has slopes of 15% or less¹⁸. Ask Tri-County Environmental Health whether the parcel has a sanitation approval or restriction: parcels created before subdivision regulations and parcels over 20 acres receive local review, and additional testing or engineering may be needed⁵. Confirm the development district and allowed use with Planning, then verify legal access and ask whether the construction site requires a driveway approach permit^1,2. We could not confirm the county's current floodplain-development process, so ask Planning before placing a home, fill or access road in a mapped hazard area⁶. A new well that uses more than 35 gallons per minute or 10 acre-feet per year needs a state water permit, while smaller wells may qualify for an exception that is not automatic²⁰. The effective property-tax rate is about 0.8%, and the median annual bill is about $1,706¹⁸.