Your property
Checking what the rules allow in your town. This takes a few seconds.
An accessory dwelling unit (ADU), a granny flat, in-law suite, or backyard home, can add rental income or family space. Whether Middlesex allows one, and how big, comes down to the town’s zoning and your specific lot. Here’s what we know, and how to check yours.
We've mapped Middlesex's residential zoning. An ADU on your lot follows the town's accessory-structure standards: check your specific address for the exact size, height, and setback it allows.
Source: middlesex-nj Schedule of Zone Requirements, zone R-100: maximum height 35 feet / 2 stories. Read from the ordinance…
From 1,325 real Middlesex permits in the New Jersey DCA record. The largest group, international residential code, takes a median of 24 days from filing to issue (n=1,061). This is elapsed time, not review hours: it includes the waiting and the corrections.
| Project type | Permits | Fastest 25% | Median | Slowest 25% |
|---|---|---|---|---|
| International Residential Code | 1,061 | 13d | 24d | 50d |
| Accessory buildings and miscellaneous structures | 108 | 19d | 42d | 202d |
| Business Uses | 90 | 14d | 40d | 210d |
| Multiple family dwellings, dormitories, etc. | 34 | 61d | 225d | 329d |
| Storage building, moderate hazard | 18 | 164d | 219d | 502d |
New Jersey has no single statewide ADU law. Each of the state's 564 municipalities, Middlesex (Middlesex County, NJ) included, sets its own zoning for accessory dwelling units (granny flats, in-law suites, backyard homes). Whether you can build one in Middlesex, how big, and how tall depends on the town's ordinance and your specific lot. We've mapped Middlesex's residential zoning: buildings are capped around 35 ft / 2 stories. Your ADU follows the town's accessory-structure standards on top of that.
Our proven designs, each fitted to your lot, then made yours (trim, color, layout). Photorealistic renderings of the real thing, not stock photos.
Explore all modelsMiddlesex sets its own ADU rules, and we've mapped its residential zoning. Whether your specific lot qualifies, and how big an ADU it allows, comes down to your parcel's size, setbacks, and the accessory-structure standards. Check your Middlesex address to see for sure, free.
A detached ADU in Middlesex typically runs $150,000 to $300,000+ all-in depending on size, site, and finishes. Because the build is financed, you can add rental income to your Middlesex property without paying the build cost up front, and the rent helps carry the loan.
Some NJ towns require owner-occupancy; others (like Jersey City) don't. We check Middlesex's specific ordinance for you when you run your address.
Enter your address and we read Middlesex’s zoning against your parcel and tell you if an ADU fits, how big, and what it could earn. Free.
Check if your Middlesex lot qualifies, free| Educational | 14 | 127d | 232d | 272d |
Source: NJ DCA UCC construction permit record. Days from application to issue. Cohorts under 10 permits and intervals beyond 1,095 days are excluded, the latter being a record-keeping artefact rather than a slow town.
