Unincorporated Redwood County, Minnesota requires a county permit for new structures, additions, moved structures and rebuilding in place.1 The Environmental Office administers county zoning and approves septic systems.23 A different jurisdiction may control inside a municipality, the Lower Sioux Community, Paxton Township or the area within two miles of Redwood Falls.1
At a glance
- Building permit
- Required for listed construction in unincorporated areas1
- Zoning
- Administered by the County Environmental Office2
- Septic
- County approval is required before installation34
- Minimum lot
- At least 2.5 acres for buildable lots using on-lot utilities, with exceptions5
- RV living
- Not confirmed; ask the Environmental Office for the parcel's district rule64
- Tiny home
- No specific occupancy rule confirmed; ask the Environmental Office64
- Owner-builder
- State contractor-license exemption may apply, but permits still apply71
- Floodplain work
- County permit required for covered development8
Who to call
Zoning
Redwood County Environmental Office
County zoning permits, zoning administration, septic design approval and septic inspections
Redwood County Government Center 403 South Mill Street, P.O. Box 130 Redwood Falls, MN 56283
Roads & driveways
Redwood County Highway Department
Online applications for Redwood County highway permits
Redwood County Highway Department 1820 East Bridge Street Redwood Falls, MN 56283
Contact details are copied from each office’s official page and were checked against it on September 27, 2026.
Do you need a building permit in Redwood County, Minnesota?
Yes, for the construction work identified by Redwood County on land under county jurisdiction. A permit is required for a new structure, an addition, moving a structure or rebuilding a structure in the same location.1 All buildings and structures with a footprint larger than 100 square feet require a permit, and a county permit remains valid for one year after issuance.1
Internal remodeling, replacement windows and doors, roofing, siding, and refacing an existing advertising or business sign do not require this county permit.1 The county uses construction permits to check setbacks from roads, water bodies, county ditches and tile, property lines, septic systems and wells, and to confirm that the use fits the zoning district.9
Redwood County's permit is a zoning or construction permit; we could not confirm that the county conducts ordinary building-code inspections or requires a certificate of occupancy. Ask the Environmental Office what review applies to the exact project before construction begins.4
Who handles building permits in Redwood County?
The Redwood County Environmental Office is the first stop for a county zoning permit, which its forms page labels as a building permit.4 The office is at the Redwood County Government Center, 403 South Mill Street, P.O. Box 130, Redwood Falls, MN 56283, and its phone number is 507-637-4023.4
Applications go to the Zoning Administrator on county forms and may need duplicate, scale drawings showing the lot and structures.10 The Zoning Administrator must approve the application before issuing the permit, and some requests also go to the Board of Adjustment, Planning Commission or County Board.10 Work that needs a permit cannot begin before the permit is granted.10
The published base zoning-permit fee is $40, while a new-home permit is $100; the fee schedule adds project-cost provisions and other qualifications.11 Properties inside incorporated municipalities, the Lower Sioux Community, Paxton Township or within two miles of Redwood Falls may need approval from another jurisdiction, so identify the parcel's authority first.1
Does Redwood County have zoning?
Yes. The Redwood County Environmental Office administers and enforces the county zoning ordinance, principally in unincorporated Redwood County.2 The ordinance has district-specific uses and standards, including an Agricultural District intended to retain agricultural land and control scattered nonfarm development.6
For a buildable lot served by on-lot utilities, the general county standard is at least 2.5 acres, at least 150 feet wide at the building setback line and at least 200 feet deep.5 A legal nonconforming lot of record is excepted from the minimum-area rule, and shoreland classifications may impose different or larger standards.5 Setbacks vary with the zoning district, use and special overlays such as shoreland or floodplain.9
Do not treat a rural parcel as unrestricted. We could not confirm a countywide minimum dwelling size, accessory-dwelling rule, lot-coverage limit or numeric building-height limit; ask the Environmental Office to check the parcel's zoning district and any special area.4
How do septic permits work in Redwood County?
The Redwood County Environmental Office administers the local septic program, and a septic system cannot be installed until the county approves it.34 The office reviews system designs and conducts on-site inspections, including a soil inspection before design and inspections when the tank and distribution pipes are placed.4 The published county septic-system permit fee is $200.11
Plan for site-specific design rather than assuming a conventional drain field will work: only about 2.5% of county soils are rated without severe limits for a conventional septic drain field.12 Redwood County's ordinance adds standards beyond Minnesota's statewide septic rules and may also apply within municipalities that have not adopted their own septic ordinance.3
Minnesota generally leaves design review and construction permits for most septic systems to counties, cities and townships, while systems designed above 10,000 gallons per day require an MPCA permit.13 Before closing on land, have the Environmental Office confirm the authority, soil evaluation and design path for that parcel.4
Can you live in an RV or tiny home in Redwood County?
We could not confirm a general Redwood County rule allowing or prohibiting long-term RV residence, temporary camping or tiny-home occupancy on private land. Ask the Environmental Office for a written answer tied to the parcel's zoning district, proposed duration, utilities and sanitation plan.4 The county ordinance has district-specific uses and standards, so a small structure or movable unit should not be assumed exempt from land-use review.6
Minnesota's campground licensing rule does not answer whether one household may live in an RV on one private parcel. It applies to an area accommodating five or more tents or recreational camping vehicles and requires a state license, subject to listed exceptions.14
A tiny home also does not bypass the county's construction-permit rule merely because it is small: county permits apply to buildings and structures with footprints larger than 100 square feet, while we could not confirm a minimum dwelling size.1 Any wastewater proposal still needs an approved path through the county septic program.3
Building a home in Redwood County: what are the steps?
- Confirm jurisdiction. Determine whether the parcel is in unincorporated Redwood County or under a municipality, the Lower Sioux Community, Paxton Township or the special area near Redwood Falls.1
- Check the parcel and concept with the Environmental Office. Confirm the zoning district, allowed residential use, lot dimensions, setbacks and any shoreland or floodplain controls.659
- Prepare the county application. Submit county forms and any required scale plans; do not start permit-required work before approval.10
- Resolve wastewater. Obtain county approval for the septic design and schedule the required on-site inspections.4
- Resolve access. A driveway connecting to a public highway is subject to regulation and a permit from the responsible road authority; the County Highway Department accepts its permit applications online.1516
- Confirm remaining inspections. Ask which building-code inspections, trade permits or occupancy approvals apply because ordinary county building inspection and certificate-of-occupancy requirements were not confirmed.
An owner who personally builds or improves residential real estate may qualify for Minnesota's contractor-license exemption when the statutory occupancy or rental conditions are met, but that exemption does not waive permits or inspections.7
What should you check before buying land in Redwood County?
Start with buildability, wastewater, flood risk and legal access. A buildable lot using on-lot utilities generally needs at least 2.5 acres plus the county's width and depth standards, although recorded-lot and shoreland qualifications can change the answer.5 Conventional septic suitability is a major screening issue because only about 2.5% of county soils are rated without severe drain-field limits.12
Ask the Environmental Office to identify the zoning district, setbacks, septic path, mapped shoreland or floodplain status, and whether a split or plat needs review.4 County subdivision plats require Planning Commission and County Board review before recording.17 Floodplain construction, repairs, fill, excavation and material storage can require a permit and professional elevation or floodproofing documentation.8
Confirm which road authority controls the proposed entrance before relying on visible field access. Minnesota makes additional access to a public highway subject to reasonable regulation and a permit from that road authority.15 For context on carrying cost, the county's median property-tax bill is about $1,444 per year.18
Watch-outs
- A Redwood County permit does not settle every jurisdictional question near municipalities, the Lower Sioux Community, Paxton Township or the area within two miles of Redwood Falls.1
- Only about 2.5% of county soils are rated without severe limitations for a conventional septic drain field, so investigate wastewater feasibility before treating a parcel as buildable.12
- Floodplain work can need a separate permit for construction, repairs, fill, excavation or storage.8
- Long-term RV residence, tiny-home occupancy, private-well permitting and ordinary building-code inspections remain unconfirmed; ask the Environmental Office which authorities apply to the parcel.4
Sources
- 2023 Building Permit Reminders - Redwood County, MN, quoted and re-checked
- Environmental Office - Redwood County, MN, quoted and re-checked
- Environmental Office - Redwood County, MN, quoted and re-checked
- Redwood County Environmental Office (redwoodcounty-mn.gov)
- Redwood County Zoning Ordinance, quoted and re-checked
- Environmental Office - Redwood County, MN, quoted and re-checked
- Sec. 326B.805 MN Statutes (Minnesota statewide rule), quoted and re-checked
- Redwood County Zoning Ordinance, quoted and re-checked
- 2023 Building Permit Reminders - Redwood County, MN, quoted and re-checked
- Redwood County Zoning Ordinance, quoted and re-checked
- Environmental Office - Redwood County, MN, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- SSTS design (Minnesota statewide rule), quoted and re-checked
- 2025 Minnesota Statutes, Chapter 327 (Minnesota statewide rule), quoted and re-checked
- Minnesota Statutes, section 160.18: Access to roads; approaches (Minnesota statewide rule), quoted and re-checked
- Redwood County Highway Department (redwoodcounty-mn.gov)
- Environmental Office - Redwood County, MN, quoted and re-checked
- Median property tax bill: Bolthole Index county data
Written September 27, 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.