Building permits, zoning and land rules in Martin County, Indiana

At a glance

Building permit

Requirements depend on the local jurisdiction; confirm the parcel with Martin County government before work begins⁶⁷²

Building code

The Indiana Residential Code applies to one- and two-family homes³

Zoning

A county plan commission exists, but current operative zoning rules and a zoning map could not be confirmed⁸

Septic

Martin County Health Department issues septic permits; the owner applies in writing before construction, with a published $100 application fee⁴⁹⁵

RV or tiny home

Private-land occupancy rules could not be confirmed; ask county government before relying on either use⁸²

Owner-builder

No applicable owner-builder exemption could be confirmed¹⁰

Private well

Ask the Health Department whether the parcel needs a local well permit; Indiana licenses water-well drillers¹¹⁵

Who to call

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Do you need a building permit in Martin County, Indiana?

Martin County's available information does not establish one clear countywide answer for a residential building permit, so do not treat rural land as permit-free.⁶ Indiana leaves local jurisdictions authority to require building permits or plan review, establish departments, schedule inspections and impose fines.⁷ Work that is exempt from state filing may still require local permits, and all work must comply with applicable codes.¹

The Indiana Residential Code applies to one- and two-family dwellings even where the local permit path is unclear.³ Residential structures fall under a local government entity when one exists; the county may inspect where no local entity exists, while the state describes an issue with no local entity as a private civil matter.¹² Start with Martin County government and give the office the parcel number, site address, proposed use and whether the property is inside a city or town.² Incorporated municipalities may have their own administrative process, so a county answer should not be assumed to cover land inside municipal limits.⁷

Who handles building permits in Martin County?

Martin County does not identify a dedicated county building or inspection department in the available county information, and a countywide residential issuing authority could not be confirmed.⁶ Martin County government is the practical first contact because the Board of Commissioners establishes ordinances and appoints members to boards and commissions.² Ask which office has authority over the exact parcel and whether the project needs planning approval, a local building permit, inspections or a floodplain review.⁷

For a one- or two-family dwelling, Indiana assigns responsibility to a local government entity when one exists; Martin County may provide inspections where there is no local entity.¹² State Code Enforcement instead inspects Class I structures in places without an approved building department and performs inspections when a state Construction Design Release applies.¹³ An agricultural-only building that is on the farm and not used for retail trade is outside the state Class I classification, but that does not settle local zoning or inspection requirements.¹⁴

Does Martin County, Indiana have zoning?

Martin County established an Advisory Plan Commission and adopted a comprehensive plan, but those facts alone do not confirm the operative zoning districts, map or dimensional rules for a particular parcel.⁸ We could not confirm current county rules for minimum lot size, setbacks, building height, lot coverage or minimum dwelling size, so ask Martin County government for the governing ordinance and map before designing a house or dividing land.²

A parcel inside a city or town may follow that municipality's rules rather than the process for unincorporated Martin County.⁷ If land will be split outside municipal boundaries, Indiana requires a correct plat to be recorded before lots are sold, with county approval involved unless an applicable subdivision-control ordinance places plat approval with the plan commission.¹⁵ Treat road access and sanitation as separate approvals: county-road culverts go through the Highway Department's review process, while septic goes through the Health Department.¹⁶¹⁷

How do septic permits work in Martin County?

Martin County Health Department administers on-site sewage permitting through its environmental-health function.¹⁷ Before construction, alteration or repair of a system, the owner must apply to the Health Department in writing. The application includes an application form, the fee, a soil analysis report by an IRSS-recognized soil scientist, a system drawing and a list of system components.⁴ The county publishes a $100 septic permit application fee, but the 2025 ordinance lets a later fee schedule change it, and the figure does not cover soil work, design or installation.⁹ Call the Health Department before committing to a house site.⁵

Site conditions deserve early attention because only about 1.4% of county soils are rated without severe limitations for a conventional septic drain field.¹⁸ That rating is a screening signal, not a parcel-specific denial, so leave room in the purchase timeline for the soil analysis.⁴ If sanitary sewer is available within a reasonable distance, Indiana prohibits a new onsite disposal system and requires connection to the sewer.¹⁹ Off-grid plans still need compliant sanitation; drywells and cesspools are not allowed as onsite sewage treatment.²⁰

Can you live in an RV or tiny home in Martin County?

We could not confirm a Martin County rule that authorizes long-term RV living on a private parcel or specifically regulates tiny-home occupancy.⁸ Ask Martin County government about the parcel's land-use status, setbacks and dwelling standards before buying land for either use.² A tiny home intended as a dwelling remains subject to Indiana's residential code when it falls within one- or two-family residential construction.³

Indiana's campground rules do not answer whether someone may live in an RV on an individually deeded lot; the statewide rule addresses regulated campgrounds and expressly has a different scope.²¹ Likewise, the temporary-campground rule governs campground operations rather than establishing private-land residential permission.²² Sanitation remains a separate constraint: a dwelling beyond sewer service needs a compliant onsite sewage system, while a site within reasonable reach of sanitary sewer must connect.²³ The Health Department is the right office for septic feasibility, not for a promise that RV or tiny-home occupancy is allowed.⁵

What steps should you take before building in Martin County?

1. Confirm whether the parcel is in unincorporated Martin County or inside a municipality, then ask Martin County government which planning, zoning, floodplain and building authorities apply.²⁷

1. Take a sketch of the proposed home, accessory structures, driveway and septic area to the responsible local office before final design.⁶

1. Contact the Health Department early for the septic application and parcel-specific site requirements; conventional drain-field suitability is severely limited across most mapped county soils.⁵¹⁸

1. For access from a county road, call the Highway Department about a driveway culvert; the department reviews the site, recommends pipe size and installs owner-purchased pipe under its stated process.¹⁶ For access from an Indiana state highway, permission from the road authority is required and applications go through INDOT's electronic system.²⁴

1. Check flood status before placing improvements because Indiana DNR has jurisdiction over most floodway development, while local rules can still apply elsewhere in the floodplain.²⁵²⁶

1. Obtain every required approval before construction and keep the approved plans, receipts and inspection records together.²⁷⁷

What should you check before buying land in Martin County?

Start with buildability, not the listing description. Ask Martin County government for the controlling jurisdiction, current land-use rules, floodplain contact and any recorded plat constraints.² Ask the Health Department about septic feasibility and whether a private well needs a local permit, because Indiana's statewide guidance says some local health departments require well permits but does not identify Martin County's rule.⁵¹¹

Terrain and ownership patterns can narrow the usable envelope: about 54% of land has a slope of 15% or less, about 69.9% is wooded and about 32% is federal land.²⁸²⁹³⁰ Those countywide figures do not replace a survey, title review or site evaluation.¹⁵ For budgeting context, the county's effective property-tax rate is about 0.5% and the median annual property-tax bill is about $798.³¹³² Finally, confirm legal road access and culvert needs with the Highway Department before assuming a visible track can serve a homesite.¹⁶

Watch-outs

• The presence of a plan commission and comprehensive plan does not by itself identify the operative zoning map or parcel rules; ask Martin County government for the current ordinance covering the site.⁸²
• A published septic application fee does not include every site, design or installation cost, and the county ordinance allows the fee schedule to change.⁹
• A driveway onto an Indiana state highway requires permission from INDOT, while county-road culvert questions go to the Martin County Highway Department.²⁴¹⁶
• Do not assume an agricultural building is exempt from local rules merely because qualifying farm-use buildings are outside Indiana's state Class I classification.¹⁴

Sources

1. Rules of the Indiana Fire Prevention and Building Safety Commission, quoted and re-checked
2. Martin County government (in.gov)
3. DHS: Rules of the Indiana Fire Prevention and Building Safety Commission, quoted and re-checked
4. Martin County Ordinance No. 2025-08: On-Site Sewage Disposal System and Installation, quoted and re-checked
5. Martin County Health Department (in.gov)
6. Martin County Ordinances and Resolutions (2026 county census)
7. in.gov (Indiana statewide rule), quoted and re-checked
8. Martin County Ordinances and Resolutions (2026 county census)
9. Martin County: Health Department, quoted and re-checked
10. (2026 county census)
11. Recommended Standards For Private Water Wells (Indiana statewide rule), quoted and re-checked
12. DHS: Code Enforcement, quoted and re-checked
13. DHS: Code Enforcement (Indiana statewide rule), quoted and re-checked
14. Plan Review FAQs (Indiana statewide rule), quoted and re-checked
15. 2023 County Recorders Resource Library (Indiana statewide rule), quoted and re-checked
16. Martin County Highway Department (in.gov)
17. Martin County: Health Department, quoted and re-checked
18. 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
19. Environmental Public Health: Onsite Sewage Systems Program, quoted and re-checked
20. 410 IAC 6-8.3 Residential On-Site Sewage Systems (Indiana statewide rule), quoted and re-checked
21. Environmental Public Health: 410 IAC 6-71 Campgrounds (Indiana statewide rule), quoted and re-checked
22. Environmental Public Health: 410 IAC 6-71 Campgrounds (Indiana statewide rule), quoted and re-checked
23. Environmental Public Health: Onsite Sewage Systems Program, quoted and re-checked
24. INDOT Driveway Permit Guide 2024 (Indiana statewide rule), quoted and re-checked
25. Water: Community Assistance & Information (Indiana statewide rule), quoted and re-checked
26. Water: Community Assistance & Information (Indiana statewide rule), quoted and re-checked
27. Martin County: Health Department, quoted and re-checked
28. Share of land at 15% slope or less: Bolthole Index county data
29. Wooded share of land: Bolthole Index county data
30. Federal land share: Bolthole Index county data
31. Effective property tax rate: Bolthole Index county data
32. Median property tax bill: Bolthole Index county data

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.