Richland County, Montana requires a construction (building) permit for new construction, issued by the county Building Department outside Sidney, while electrical, plumbing and mechanical permits come from the state123. Zoning varies by location, and land-use planning inside Sidney goes through the City Office4. Septic permits come from the Richland County Health Department's Environmental Health Office, with a $200 application fee5.
At a glance
- Building permit
- Required for new construction; some finish work and agricultural structures are excepted1
- Building inspections
- Required at specified stages for county-administered work6
- Zoning
- Varies by location; published county materials include the McGlynn Reservoir district47
- Septic
- County permit and installation inspection required58
- RV living
- Private-land residential occupancy was not confirmed; ask Planning and Environmental Health910
- Tiny homes
- No specific occupancy rule was confirmed; building, zoning and sanitation rules still need review11910
- Owner-builder
- State contractor-registration exemption may apply, but it does not waive permits or inspections12
Who to call
Building permits
Richland County Building Department
Plan review, building permits, certificates of occupancy and building inspections for Richland County
1105 3rd ST NW Sidney, MT 59270
Planning & zoning
Richland County Planning Department
Planning, zoning, subdivision review and special or rural district questions in Richland County; Sidney city-limit questions go to the city
2177 Lincoln Avenue S.E. Sidney, MMT 59270
Septic permits
Richland County Health Department, Environmental Health Office
On-site septic permitting, parcel review and installation inspections in Richland County
1201 West Holly, Suite 1, Sidney MT 59270
Roads & driveways
County roads and bridges; the county publishes encroachment and approach permit forms
2140 West Holly Street
Floodplain permits
Richland County Floodplain Management
County floodplain regulations, mapping resources and information used to determine whether a floodplain permit is needed
Contact details are copied from each office’s official page and were checked against it on October 9, 2026.
Off-grid gear
Going off-grid in Richland County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Richland County, Montana?
Richland County says a construction permit is required for all new construction, and a building permit may also be needed to repair or replace existing fixtures.1 Wallpapering, painting and similar finish work are exceptions, and certain agricultural structures may also qualify; ask the Building Inspector or Montana Building Division whether a specific farm project is exempt.13 Richland County administers building-code enforcement outside Sidney only in the areas covered by its partial state certification, with Montana administering the remaining code areas.314 Electrical, mechanical and plumbing permits are separate and are obtained from Montana, not from the county.2
Who issues building permits in Richland County, Montana?
The Richland County Building Department reviews plans, issues building permits and certificates of occupancy, and performs county building inspections.15 Plans, a plot plan and construction details may be required, and approved plans cannot be changed without Building Department approval.16 Richland County publishes building-permit and plan-review fees, but the available material does not provide usable dollar amounts; ask the department for the current total.17 For covered buildings, the county issues a certificate of occupancy after requested inspections and correction of deficiencies, while remodels and small additions may receive a certificate of final inspection.18
Does Richland County, Montana have zoning?
Zoning approval in Richland County varies by location rather than following one confirmed countywide rule.4 The county Planning Department supports the unincorporated communities of Crane, Lambert and Savage and the Town of Fairview, while land-use planning inside Sidney belongs with the City Office.4 Richland County publishes regulations and a map for the McGlynn Reservoir citizen-initiated zoning district, but those materials do not establish a rule for the entire county.7 Ask Planning to identify the parcel's district and applicable setbacks, minimum dwelling size, lot size, lot coverage and height limits because those details could not be confirmed from the available district materials.19
Who issues septic permits in Richland County, Montana?
The Richland County Health Department Environmental Health Office administers on-site wastewater permitting, parcel review and inspections.20 A septic permit is required before installation, and the application fee is $200.5 A county sanitarian or Montana-registered professional engineer must perform the site evaluation.21 Installation must be inspected before backfilling unless a county sanitarian authorizes otherwise.8 A sanitary restriction can prevent both water or sewer facilities and issuance of a septic permit until further review resolves it.22 Subdividing land into parcels smaller than 20 acres also triggers a Certificate of Subdivision Approval from the Montana Department of Environmental Quality, issued with the county health department, and many such approvals cover only one single-family living unit.23 Only 6.9% of county soils are rated without severe limitations for a conventional drain field, so test septic feasibility early.24
Can you live in an RV or tiny home in Richland County, Montana?
Richland County's rules for long-term RV occupancy on private land could not be confirmed, so ask the Planning Department and Environmental Health Office about the parcel, intended stay and wastewater plan.910 A specific tiny-home occupancy rule also could not be confirmed; a tiny home proposed as a dwelling still needs review for applicable construction permits, location-specific zoning and sanitation.11910 State rules for camping on public-use or state-trust land do not answer whether an RV may be occupied on private property.2526
What are the steps to build a home in Richland County, Montana?
- Ask Richland County Planning which land-use rules and special districts apply; projects inside Sidney go to the city.4
- Have Environmental Health review septic feasibility, including any sanitary restriction, before committing to a house site.5
- Submit the plans, plot plan and construction information requested by the Building Department and obtain approval before starting work.16
- Arrange footing and foundation, framing, drywall and final inspections; the owner remains responsible for calling even when a contractor does it.6
- Correct deficiencies and obtain the applicable certificate of occupancy or final inspection.18
- Ask Floodplain Management about mapped hazards and confirm road access with Public Works or Montana transportation officials.272829
What should you check before buying land in Richland County?
Confirm the parcel's zoning district, subdivision status and whether it lies inside Sidney before treating it as buildable; a parcel under 20 acres created by subdivision needs a Certificate of Subdivision Approval that may limit what can be built.423 Order septic feasibility early because only 6.9% of county soils are rated without severe limits for a conventional drain field, and sanitary restrictions can prohibit water or sewer facilities.2422 Ask Floodplain Management whether the site needs further review, and confirm legal access with Public Works for a county road or Montana transportation officials for a state highway.272829 The effective property-tax rate is about 0.7%, and the median annual property-tax bill is $1,935.3031
Watch-outs
- A construction permit is required for new construction even though Richland County's own building-code enforcement is partial outside Sidney.13
- Do not assume one zoning answer applies everywhere: Richland County publishes a special McGlynn Reservoir district, and Sidney handles land-use planning inside city limits.74
- A sanitary restriction can prevent water or sewer facilities and stop a septic permit until further review resolves it.22
Sources
- General Q&A - Richland County Montana, quoted and re-checked
- richland.org, quoted and re-checked
- Certified City, County and Town Programs, quoted and re-checked
- Zoning Commission - Richland County Montana, quoted and re-checked
- Septic Systems in Richland County, quoted and re-checked
- Inspection Information - Richland County Montana, quoted and re-checked
- Zoning Commission - Richland County Montana, quoted and re-checked
- Septic Systems in Richland County, quoted and re-checked
- Richland County Zoning Commission (2026 county census)
- Septic Systems in Richland County (2026 county census)
- General Q&A - Richland County Montana (2026 county census)
- Montana Code Annotated, Title 37, Chapter 45, Construction Contractors (Montana statewide rule), quoted and re-checked
- General Q&A - Richland County Montana, quoted and re-checked
- Montana Building Codes Program, quoted and re-checked
- Richland County Building Department (richland.org)
- General Q&A - Richland County Montana, quoted and re-checked
- Building, quoted and re-checked
- Occupancy Permits, quoted and re-checked
- Zoning Commission - Richland County Montana, quoted and re-checked
- Septic Systems in Richland County, quoted and re-checked
- Septic Systems in Richland County, quoted and re-checked
- Septic Systems in Richland County, quoted and re-checked
- Subdivision Review - Richland County Montana, quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- Public Use Rules and Regulations (Montana statewide rule), quoted and re-checked
- Camping (Montana statewide rule), quoted and re-checked
- Richland County Floodplain Management (richland.org)
- Richland County Public Works (richland.org)
- Approach Manual for Landowners and Developers (Montana statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.