Ohio

Buying Land in Madison County, Ohio

Seat London, a rural, heavily agricultural county immediately west of Franklin County along the I-70 corridor. Madison County zones its unincorporated territory countywide under a zoning resolution it fully rewrote in 2026, even as a roughly $1.5 billion hyperscale data-center campus advances in Deer Creek Township -- a sign that Columbus-area growth pressure has reached the county's eastern edge.

County Zoning Was Just Fully Rewritten in 2026

Case-by-case / verify locally

Madison County adopted a completely rewritten zoning resolution in 2026 (draft dated July 21, 2026; adopted version dated July 28, 2026), which appears to have taken effect around late August 2026. This session could not directly read the new resolution's text, so specific changes to lot sizes, setbacks, or permitted uses are NOT confirmed here -- get the current resolution directly from the county before relying on any older summary.

A $1.5 Billion Data-Center Campus Is Advancing in Deer Creek Township

Case-by-case / verify locally

Sentinel Data Centers has a pre-annexation agreement with the Village of West Jefferson to annex 78.83 acres in Deer Creek Township for a three-building hyperscale campus. If you're evaluating land in or near Deer Creek Township, expect the same kind of annexation and rezoning pressure now reshaping parts of neighboring Franklin County. See our dedicated zoning page for Madison County for specifics.

Septic Runs Through Madison County Public Health

Generally favorable

Madison County Public Health handles septic (household sewage treatment system) permitting, site evaluation, and inspections countywide. This pass found no evidence of a separate city health department carved out of any Madison County municipality, but did not exhaustively check every village.

Zoning: a countywide resolution just rewritten from scratch

Madison County has adopted county rural zoning under ORC Chapter 303, with a County Zoning Commission that reviews proposed changes and makes recommendations to the Board of County Commissioners, and a Building & Zoning department that administers permits day to day. What makes Madison County's zoning situation unusual right now is timing: the county completed a full rewrite of its zoning resolution in 2026, moving from a draft dated July 21 to an adopted version dated July 28, with other county materials pointing to an effective date around August 26, 2026. That is a brand-new document, not a decades-old resolution with occasional amendments.

This research pass could not directly read the new resolution's text (the county's PDF was not reachable through this session's tools), so this page does not claim to know what specifically changed -- whether lot-size minimums, setback requirements, permitted agricultural or industrial uses, or something else was the focus of the rewrite. Anyone evaluating a specific Madison County parcel right now should treat the zoning resolution as freshly changed and get the current text, and current district map, directly from the county's Building & Zoning department rather than relying on an older summary, a real-estate listing, or a search result that may reflect the prior resolution.

Growth pressure has reached the county's eastern edge

Madison County sits immediately west of Franklin County and Columbus along I-70, and it is not insulated from the data-center and logistics growth reshaping Central Ohio. Sentinel Data Centers has advanced a pre-annexation agreement with the Village of West Jefferson to annex 78.83 acres in Deer Creek Township for a roughly $1.5 billion hyperscale campus -- three two-story buildings of 186,438 square feet each, with a full buildout that could take up to 15 years depending on market demand and electricity availability. That puts Madison County, and Deer Creek Township specifically, inside the same broader wave of Central Ohio hyperscale development that has already reshaped parts of Franklin and Licking Counties around New Albany.

For a buyer looking at unincorporated land in or near Deer Creek Township, or near any other Madison County village with room to annex, the practical lesson is the same one that applies anywhere near an active annexation target: a parcel's zoning and taxing jurisdiction can change if an adjoining village annexes nearby land, and that possibility is worth asking about directly rather than assuming today's zoning designation is permanent. See our dedicated zoning page for Madison County for more on the Sentinel project and what it could mean for land nearby.

Septic, water, and other departments to know

Madison County Public Health handles septic (household sewage treatment system) permitting, site evaluation, design review, installation inspections, and operational inspections countywide, along with soil surveys and subdivision/lot-split review. The Madison County Soil & Water Conservation District has separately administered Ohio EPA funding (reported at more than $150,000 available as of this research pass) to help homeowners repair or replace failing septic systems -- worth asking about if a parcel's existing system needs work.

The Madison County Auditor (1 N. Main St., London; (740) 852-9717) and Recorder ((740) 852-1854) hold property records, deeds, and plats, both based at the county courthouse in London. The Madison County Engineer's office (825 US-42, London) handles road, drainage, and subdivision infrastructure questions for unincorporated land. As with zoning, confirm current fees and procedures directly, since this pass relied on search-indexed content rather than a direct site read.

What we could and couldn't confirm

Madison County's adoption of county rural zoning under ORC Chapter 303 and the 2026 zoning-resolution rewrite dates (draft July 21, adopted July 28, referenced effective date around August 26) are drawn from the county's own posted PDFs and zoning page, but this session's direct WebFetch attempts to madison.oh.gov, co.madison.oh.us, and the zoning-resolution PDFs themselves were all blocked by the network egress proxy -- so the new resolution's substantive content (lot sizes, setbacks, use tables) was NOT read and is not described here. The Sentinel Data Centers project's acreage, township, cost estimate, and buildout timeline are drawn from New Project Media's origination reporting and a data-center risk-tracking site (stopohiodatacenters.org, an advocacy-oriented aggregator whose figures should be treated as directionally reliable rather than official); this pass did not find the project's Ohio Power Siting Board case number, if one exists, and did not confirm it independently. Madison County Public Health's septic role and lack of a separate city health department are based on the absence of contrary evidence in search results, not an exhaustive check of every incorporated village in the county.

Verify directly with: Madison County Building & Zoning for the current 2026 zoning-resolution text and district map for a specific parcel, and Madison County Public Health for septic and well permitting

Who to Call Before Buying Land in Madison County

Direct WebFetch to madison.oh.gov and co.madison.oh.us was attempted and blocked by this session's network egress proxy, so several details (especially the specific content of the 2026 zoning rewrite) reflect search-indexed summaries rather than a full verbatim read -- confirm current staff, fees, and the current zoning resolution directly before relying on this page for a specific parcel.

Planning & Zoning