Unincorporated Delaware County, Iowa requires a zoning permit before a new structure is built, but the county does not perform building-code inspections12. County zoning governs land outside incorporated municipalities, and the Water and Sanitation Department permits and inspects private septic systems34.
At a glance
- Building permit
- A zoning permit is required for new structures; no county building-code inspection12
- Zoning
- County zoning applies in unincorporated Delaware County53
- Septic
- County Water and Sanitation permits and inspects private systems46
- RV living
- Long-term occupancy and temporary camping rules are unconfirmed; ask County Zoning5
- Tiny homes
- No tiny-home occupancy or minimum dwelling-size rule confirmed; zoning still applies5
- Owner-builder
- Work on your own property is exempt from contractor registration, not from permits or code compliance7
- Private wells
- County Water and Sanitation handles well permits and water testing8
Who to call
Zoning
Delaware County Zoning Department
Zoning permits, land use, setbacks and zoning questions for unincorporated Delaware County
Delaware County Courthouse, 301 E Main Street, Manchester, IA 52057
Septic permits
Delaware County Water and Sanitation Department
Private septic permits and inspections, private-well permits, water testing and well-plugging assistance
Delaware County Courthouse 301 E Main StreetManchester, Iowa 52057
Roads & driveways
Delaware County Engineer / Secondary Roads
County-road entrance review and approval, right-of-way permits and floodplain questions
County Engineer 2139 Highway 38 Manchester, IA 52057
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 Delaware County, Iowa?
Delaware County requires a zoning permit before a building or structure is erected, reconstructed, enlarged or changed to a new use, but the county does not conduct building-code inspections12. The zoning permit addresses land use and setbacks rather than construction-code inspection2. Routine replacement of roofs, windows, siding and doors does not require a zoning permit when the work does not enlarge the structure or change its use1. Iowa's state building code separately applies in limited circumstances, including state projects, certain state-funded buildings, factory-built structures and jurisdictions that adopt it9. Whether another building code, residential inspection or certificate of occupancy applies to a particular private project remains unconfirmed; ask County Zoning before ordering plans or starting work10.
Who handles permits in Delaware County?
Delaware County does not identify a separate county building department that performs building-code inspections; the Delaware County Zoning Department is the first stop for a rural construction project210. Call (563) 927-5925, email [email protected] or submit the application to the Delaware County Courthouse, 301 E Main Street, Manchester, IA 5205710. The county provides a zoning-permit application, and work may not begin before the zoning permit is issued10. Application fees are established by the Board of Supervisors and posted by the Zoning Administrator11. Water and Sanitation handles septic and well permits at the same courthouse contact8. Secondary Roads reviews county-road entrances and right-of-way work; call (563) 927-3505 for access or floodplain questions1213.
Does Delaware County have zoning?
Yes. Delaware County zoning applies throughout the county outside incorporated municipalities, so a parcel inside a city follows that city's rules instead3. District standards matter: residential lots in the A-1, R-1 and R-2 districts generally need at least 1 acre and 125 feet of width when public or community sewer is unavailable, with district-specific exceptions14. A-1 dwellings generally have 40-foot front, 35-foot rear and 25-foot side setbacks; R-1 dwellings generally have 35-foot front, 30-foot rear and 10-foot side setbacks, with a 30-foot street-side setback on a corner lot15. Qualifying agricultural property receives different treatment: the county considers A-1 property over 5 acres exempt, while smaller properties may be considered exempt after a site plan is submitted16. Contact County Zoning for the parcel's district and a written determination before treating a farm structure as exempt1610.
How do septic permits work in Delaware County?
The Delaware County Water and Sanitation Department permits and inspects private septic systems and enforces Iowa's private sewage standards6. Contact the department before finalizing a house location because only 2.4% of county soils avoid severe limitations for a conventional septic drain field178. That countywide soil rating does not decide an individual parcel, but it makes site evaluation and system design important before purchase17. Iowa generally requires an inspection before ownership transfers involving a building served by private sewage, subject to statutory exceptions18. A qualifying transfer inspection remains valid for 2 years, and only a state-certified inspector may perform it18. Off-grid sanitation alternatives were not confirmed; ask Water and Sanitation what system can be approved for the proposed use8.
Can you live in an RV or tiny home in Delaware County?
Delaware County has not confirmed a specific rule for living long-term in an RV, temporary camping on private land or occupying a tiny home5. Ask County Zoning about the proposed use, zoning district, setbacks and whether a zoning permit or special approval is required before buying the parcel10. The county also has not confirmed a general minimum dwelling floor area5. Iowa does protect manufactured homes from exclusion solely because they are manufactured, but a manufactured home must meet the same permanent-foundation, setback and minimum-square-footage standards applied to a site-built single-family home on the same lot19. That protection does not itself authorize an RV or a tiny home as a residence19. Any occupied dwelling using private wastewater disposal must also go through the county septic process4.
How do you build a home in Delaware County?
- Confirm that the parcel is outside an incorporated municipality and obtain its county zoning district from County Zoning310.
- Verify the allowed use, minimum lot area and setbacks before fixing the house location1415.
- Ask Water and Sanitation to evaluate septic and well permitting needs before relying on a site plan8.
- Ask Secondary Roads about a county-road entrance and floodplain constraints where relevant1213.
- Submit the zoning application, fee and site plan, then wait for the issued zoning permit before starting work10.
- Confirm whether any non-county building code, inspection or occupancy approval applies, because Delaware County itself does not perform building-code inspections2.
What should you check before buying land in Delaware County?
Confirm jurisdiction, zoning district, permitted use, lot size and setbacks with County Zoning before closing31415. Order parcel-specific septic feasibility work because only 2.4% of county soils avoid severe limitations for a conventional drain field17. Verify well permitting with Water and Sanitation, floodplain status with Secondary Roads, and legal county-road access before choosing the build site812. Review the abstract for easements and restrictive covenants as the county application directs10. Delaware County's effective property-tax rate is about 1.3%, and the median annual property-tax bill is about $2,2662021. The county has about 17,600 residents at 30.5 people per square mile, and the nearest city of 100,000 or more is about 38 miles from the county center222324.
Watch-outs
- A Delaware County zoning permit is still required for new structures even though the county does not perform building-code inspections12.
- Only 2.4% of Delaware County soils avoid severe limitations for a conventional septic drain field, so verify septic feasibility before fixing a house site17.
- RV occupancy, temporary camping, tiny-home occupancy and a general minimum dwelling size remain unconfirmed; ask County Zoning about the exact parcel and proposed use10.
Sources
- Delaware County Zoning FAQ (2026 county census)
- Frequently Asked Questions, quoted and re-checked
- Delaware County Zoning Department, quoted and re-checked
- Delaware County, Iowa - Water and Sanitation (2026 county census)
- Delaware County Zoning Department (2026 county census)
- Delaware County, Iowa - Water and Sanitation, quoted and re-checked
- Iowa Code 2026, Chapter 91C — Construction Contractors (Iowa statewide rule), quoted and re-checked
- Delaware County Water and Sanitation Department (delawarecounty.iowa.gov)
- Building Code Plan Review (Iowa statewide rule), quoted and re-checked
- Delaware County Zoning Department (delawarecountyzoning.iowa.gov)
- Delaware County Zoning Ordinance, quoted and re-checked
- Delaware County Engineer / Secondary Roads (delawarecounty.iowa.gov)
- Delaware County Zoning Ordinance, quoted and re-checked
- Delaware County Zoning Ordinance, quoted and re-checked
- Delaware County Zoning Ordinance, quoted and re-checked
- Frequently Asked Questions, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Iowa Code §455B.172, Jurisdiction of department and local boards (Iowa statewide rule), quoted and re-checked
- Iowa Code §335.30, Manufactured and modular homes (Iowa statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- County population: Bolthole Index county data
- Population density: Bolthole Index county data
- Distance to the nearest metro area: 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.