# Planned developments in Jefferson County, WI

Boardwalk found 1,300+ planned projects in Jefferson County, WI in public filings from the last 12 months. The latest is on the Town of Rome Plan Commission agenda for Oct 6, 2026.

Data as of Oct 11, 2026. Updated monthly. Page: https://boardwalkai.com/development/wisconsin/jefferson/

## Jefferson County at a glance

| Measure | Value |
|---|---|
| Projects, last 12 months | 1,300+ |
| New in the last 30 days | 110+ |
| Most common type | Residential |
| Latest filing | Oct 6, 2026, Town of Rome Plan Commission |
| Sources we check | 4 |

Last 12 months, duplicates merged. Includes private, public, and small jobs. How we count: https://boardwalkai.com/coverage/#how-we-count

## What's planned in Jefferson County

By type, last 12 months.

| Type | Projects | Share |
|---|---|---|
| Residential | 490+ | 35% |
| Development decisions | 380+ | 28% |
| Infrastructure | 220+ | 16% |
| Commercial | 120+ | 9% |
| Public and institutional | 73 | 5% |
| Industrial | 44 | 3% |
| Agricultural | 42 | 3% |
| Mixed use | 7 | 1% |

## Recent projects in Jefferson County

| Project | Location | Developer | Type | Size | Stage | Latest meeting |
|---|---|---|---|---|---|---|
| 40-Acre Rezoning from Forest to Rural Residence | Rome, WI | SA Properties | Residential | 40 acres | Seeking approval | Oct 6, 2026 |
| 10.22-Acre Contractor Storage Yard Rezoning | Watertown, WI | Jacob Wegner Properties LLC | Industrial | 10.2 acres | Seeking approval | Sep 28, 2026 |
| 5-Megawatt Solar Energy Facility on 59 Acres | Watertown, WI | OneEnergy Development LLC | Power plants | 59.5 acres | Seeking approval | Sep 28, 2026 |
| Mercy Health Healthcare Facility Site Plan | Jefferson County, WI | Mercy Health | Hospitals and clinics | Not stated in filing | Seeking approval | Sep 22, 2026 |
| New Department of Public Works Facility | Ixonia, WI | Not stated | Government offices | Not stated in filing | Early planning | Sep 17, 2026 |
| Multi-Tenant Commercial Building with Auto Service | Watertown, WI | FNB Properties, LLC | Auto repair | Not stated in filing | Approved | Sep 14, 2026 |
| 24-Unit Multifamily Development | Watertown, WI | 4th Dimension Real Estate | Multifamily | 24 units | Referred | Sep 14, 2026 |
| 73-Acre Solar Farm | Oakland, WI | OneEnergy Renewables | Power plants | 73.5 acres | Seeking approval | Aug 31, 2026 |
| 2.5 MW Solar Array on 10 Acres | Watertown, WI | SunVest Solar | Solar farms | 10 acres | Recommended | Jul 13, 2026 |
| 5.7-Acre Campground Development | Hebron, WI | Edgehill Ventures LLC | Campgrounds and RV parks | 5.7 acres | Recommended | Aug 12, 2025 |

Showing 10 of 1,300+ projects. A free trial opens the full records and documents.

Samples show projects filed by companies or public bodies.

## Cities in Jefferson County

- [Watertown, WI](https://boardwalkai.com/development/wisconsin/watertown/) · 710+ projects
- [Fort Atkinson, WI](https://boardwalkai.com/development/wisconsin/fort-atkinson/) · 110+ projects
- [Lake Mills, WI](https://boardwalkai.com/development/wisconsin/lake-mills/) · 82 projects
- [Johnson Creek, WI](https://boardwalkai.com/development/wisconsin/johnson-creek/) · 70 projects
- [Rome, WI](https://boardwalkai.com/development/wisconsin/rome/) · 55 projects
- [Ixonia, WI](https://boardwalkai.com/development/wisconsin/ixonia/) · 42 projects
- Sullivan, WI · 21 projects
- Palmyra, WI · 20 projects
- Cambridge, WI · 19 projects
- Waterloo, WI · 18 projects
- Jefferson, WI · 11 projects
- Lac La Belle, WI · 3 projects
- Lake Ripley, WI · 2 projects
- Lake Koshkonong, WI · Checked, no projects in 12 months

## Nearby places

- [Waukesha County, WI](https://boardwalkai.com/development/wisconsin/waukesha/) · 1,500+ projects
- [Dodge County, WI](https://boardwalkai.com/development/wisconsin/dodge/) · 280+ projects
- [Washington County, WI](https://boardwalkai.com/development/wisconsin/washington/) · 560+ projects
- [Walworth County, WI](https://boardwalkai.com/development/wisconsin/walworth/) · 780+ projects
- [Rock County, WI](https://boardwalkai.com/development/wisconsin/rock/) · 470+ projects
- [Columbia County, WI](https://boardwalkai.com/development/wisconsin/columbia/) · 210+ projects

All places in Wisconsin: [Wisconsin](https://boardwalkai.com/development/wisconsin/)

## Questions about Jefferson County

### What's planned in Jefferson County, WI?

Boardwalk found 1,300+ planned projects in Jefferson County, WI in the last 12 months. The latest is on the Town of Rome Plan Commission agenda for Oct 6, 2026.

### Where does this data come from?

Boardwalk's Jefferson County projects come from public meeting records, such as Town of Rome Plan Commission agendas and minutes. Each one links to the original filing.

### How current is it?

Boardwalk checks Jefferson County's public records at least once a week; the last check was Oct 12, 2026. These counts are as of Oct 11, 2026 and refresh monthly.

### Can I get an Alert for new Jefferson County projects?

Yes, a Boardwalk Alert emails you new Jefferson County projects daily, weekly, or monthly. Start with a 7-day free trial, no credit card needed.

## Get the full data

- **Count for free.** Connect Boardwalk to Claude or ChatGPT and ask how many projects match. Counting is free during your trial and on every plan. [Use it in Claude or ChatGPT](https://boardwalkai.com/mcp/)
- **Open the records.** Start a 7-day free trial, no credit card. It includes 50 project records. [Start free trial](https://boardwalkai.com/auth/signup/)
- **Use it in your tools.** CSV export, the API, and the MCP server come with every plan. [API docs](https://boardwalkai.com/docs/api/)
- **Download these numbers.** [jefferson.json](https://boardwalkai.com/data/places/wisconsin/jefferson.json) · [jefferson.md](https://boardwalkai.com/development/wisconsin/jefferson/index.md)

## How to cite

Source: Boardwalk, "Planned developments in Jefferson County, WI", boardwalkai.com/development/wisconsin/jefferson/, data as of Oct 11, 2026.

How we count: https://boardwalkai.com/coverage/#how-we-count