Building permits for a new home in Mahoning and Trumbull counties

The approvals in the usual order

1. Zoning approval. Your township, city or village issues it, and it needs a site plan. Brookfield, Mecca, Mespotamia, Vernon and Yankee Lake townships in Trumbull County have no zoning, so the other steps come first there.
2. Sewer or septic. A lot on public sewer needs a tap permit. A lot without it needs a septic permit from the board of health.
3. Plan review and building permit. The county building department reviews your plans against the Residential Code of Ohio and issues the permit.
4. Trade permits and inspections. Electrical, plumbing and heating work are permitted and inspected separately, and the trade contractors must be licensed or registered.

Lots near a stream or in a flood area can need flood plain approval as well. Ask early.

Mahoning County

For homes in Mahoning County's townships, the Mahoning County Building Inspection Department issues the residential building permit. Zoning approval and a site plan come from the township, city or village first. The county's published process also lists a sewer tap permit (from the county sanitary engineer or, within the city, Youngstown's) or a septic permit from the Mahoning County Board of Health, a separate downspout permit from the board of health, and flood plain approval from the Mahoning County Planning Commission for county projects.

Plans are submitted as drawn-to-scale sets showing the building and utility locations, footers and foundation, floor, wall and roof construction, insulation and energy code compliance. The county says plan review usually takes one to two working days. Its published permit fee was $2.50 per $1,000 of construction cost plus a $10 flat fee and a 1% state assessment, with a separate fee for heating. Starting work without a permit doubles the fee. These figures come from the county's own document and can change, so check the current schedule.

Heating, electrical and plumbing contractors must be licensed with the county, or with the City of Youngstown for work inside city limits.

Source: Mahoning County residential permitting process. More on building in Mahoning County.

Trumbull County

In Trumbull County, the Trumbull County Building Inspection Department enforces the building code for new construction and publishes the residential plan approval form, fee schedule and inspection request forms, along with electrical and heating applications. Zoning is handled locally: the county lists a zoning inspector for each township, city and village that has zoning, so the first call is to the office for the lot's jurisdiction.

Because the county's own pages don't lay out the full sequence for a new house, we confirm the order and fees with each office before design is final.

Sources: Trumbull County Building Inspection and its zoning inspector list. More on building in Trumbull County.

County building department contacts

As of November 2026, from each county's website. Hours and numbers change, so call ahead before visiting.

Trumbull County lists a 1% state assessment and a $10.00 processing fee on all residential permits. Inside city limits, such as Youngstown or Warren, the city building department may handle permits instead, so check your lot's jurisdiction first.

Sources: Trumbull County Building Inspection contact page and Mahoning County Building Inspection directory.

What slows permits down

The usual delays are zoning questions that come up late, a septic or sewer decision that changes the design, and plans that don't match the code or the site plan. Settling the lot's jurisdiction, utilities and flood status before you finish design avoids most of them. That's why we check them before buying, as covered in our guide to buying a lot.