Delaware's 3 counties require residential building permits for unincorporated land; none has no county zoning1. Cities administer their own land-use rules2. Delaware DNREC issues septic permits throughout the state, while RV and tiny-home answers differ by county1,3.
Which Delaware counties don't require a building permit?
No Delaware county falls into the no-residential-building-permit category, and none requires a residential building permit only in limited cases.
No Delaware county falls into the no-residential-building-permit category, and none requires a residential building permit only in limited cases1. Sussex County, Kent County and New Castle County all require residential building permits for unincorporated land1. Delaware authorizes local building-code administration rather than providing a uniform statewide application and inspection procedure, and county code-enforcement fees are not a single statewide amount6.
For owner electrical work, Delaware's homeowner-permit program requires an owner-occupant, approved inspection-agency plan review and inspections; homes for sale or rent do not qualify4. Use the Delaware owner-builder county list alongside those electrical-program conditions4.
Which Delaware counties have no zoning?
None of Delaware's 3 counties is in the no-county-zoning category; all have county zoning.
None of Delaware's 3 counties is in the no-county-zoning category; all have county zoning1. No Delaware county combines no residential building permit with no county zoning1. Delaware delegates land-use planning and regulation to counties and municipalities, so a county comparison does not establish the zoning rules inside a city or town2.
Ask the applicable county or municipal planning office for the parcel's district and current zoning requirements before choosing a house design or temporary living arrangement: Delaware's statewide planning source does not supply a single statewide district map or complete district schedule2.
Who issues septic permits in Delaware?
Delaware DNREC issues septic permits in all 3 counties.
Delaware DNREC issues septic permits in all 3 counties1. Construction or repair of an onsite wastewater system requires a DNREC permit, apart from certain emergency-repair exceptions7. Start with a licensed Class D soil scientist's site evaluation to determine the disposal-system type the parcel can support, then hire a licensed designer to design the system and obtain its permit8. Licensed Class E contractors install Delaware septic systems8.
Required DNREC wastewater-discharge and groundwater-withdrawal permits must be obtained before a local government issues a building, placement or occupancy permit, making water and wastewater approval an early step rather than an afterthought9. Off-grid sanitation still requires DNREC-approved wastewater treatment and disposal7.
Can you live in an RV or tiny home on your land in Delaware?
Delaware has county-level RV answers for 2 counties: Sussex is classified as limited, while Kent prohibits permanent habitation or long-term occupancy and describes a temporary emergency-residence exception.
Delaware has county-level RV answers for 2 counties: Sussex is classified as limited, while Kent prohibits permanent habitation or long-term occupancy and describes a temporary emergency-residence exception1. New Castle's absence from those RV answers is not permission to live in an RV; ask New Castle's land-use office before buying an RV for residential use1.
All 3 Delaware counties have tiny-home answers: New Castle County allows qualifying tiny homes as accessory dwelling units on qualifying detached single-family residential lots, while Sussex and Kent are classified as limited3. Use the Delaware tiny-home county list to compare the available answers3. Delaware's housing-code floor-area standard is occupant-based, subject to the code's exemptions and health-and-safety applicability conditions; that standard alone does not establish local tiny-home siting permission2,10.
Where are the best Delaware counties for a bolthole?
Delaware's Bolthole Index ranking puts Sussex County at 58, Kent County at 51 and New Castle County at 46, on a scale of 100; each requires residential building permits, has zoning and uses state septic permitting.
Delaware's Bolthole Index ranking puts Sussex County at 58, Kent County at 51 and New Castle County at 46, on a scale of 100; each requires residential building permits, has zoning and uses state septic permitting1. The ranking therefore offers no Delaware county where both residential building permits and county zoning disappear1.
The median county farmland value is $9,642 per acre, with Kent at $8,679 per acre; these are USDA agricultural values, not asking prices for individual buildable lots1. The median county effective property-tax rate is 0.5%, and the median county property-tax bill is $1,331 per year1. Compare the local zoning district and DNREC wastewater requirements alongside those costs when choosing a parcel2,7.
What water-well and driveway approvals do you need in Delaware?
Delaware requires prior DNREC well approval before regulated well construction, and construction generally cannot start until DNREC issues the well permit and call-in authorization number.
Delaware requires prior DNREC well approval before regulated well construction, and construction generally cannot start until DNREC issues the well permit and call-in authorization number5. A licensed well driller or well driver must perform or directly supervise well construction, repair, modification or sealing5. Ask DNREC's Wells/Well Permits contact about the proposed domestic well11.
For a new or modified entrance under DelDOT jurisdiction, including access to state-maintained roads, obtain a DelDOT entrance permit before construction12. DelDOT's online entrance application directs applicants to choose the county where the entrance permit is needed12. Address well construction, wastewater approval and road access before relying on a parcel for a new home5,9,12.
Watch-outs
- Delaware county comparisons apply to unincorporated land; obtain the municipality's zoning rules for a parcel inside city limits2.
- Delaware local floodplain administrators review development in mapped Special Flood Hazard Areas in jurisdictions participating in the National Flood Insurance Program13.
- A Delaware building intended for human habitation or occupancy must have a separate sewer connection when its premises abut a street containing a public sewer14.
- We could not confirm a statewide Delaware RV-residence rule or a single statewide lot-size or setback schedule; ask the county or municipal planning office about the parcel's proposed use and zoning district2.
Sources
14 official pages, each quoted and re-checked · written October 10, 2026
- Bolthole Index county rulebook, 3 Delaware counties, as of November 12, 2026: Delaware counties that require a residential building permit in unincorporated areas
- Delaware: 2020 Delaware Strategies for State Policies and Spending
- Bolthole Index county rulebook, 3 Delaware counties, as of November 12, 2026: Delaware counties' answers on living in a tiny home on your own land
- Delaware: Homeowner Permit
- Delaware: 7301 Regulations Governing the Construction and Use of Wells
- Delaware: Title 16, Chapter 76: County or Municipal Building, Plumbing, Electrical and Other Codes
- Delaware: 7101 Regulations Governing the Design, Installation and Operation of On-Site Wastewater Treatment and Disposal Systems
- DNREC Division of Water — Residential Services Section (dnrec.delaware.gov)
- Delaware: Delaware Code Title 7, § 6003
- Delaware: Delaware State Housing Code, Title 31, Chapter 41, Subchapter II
- DNREC Division of Water — Wells/Well Permits (dnrec.delaware.gov)
- Delaware: Entrance Permit System - Frequently Asked Questions
- Delaware: Floodplain Management
- Delaware: delcode.delaware.gov
Written October 10, 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.