County or equivalent · 34023
Middlesex County, New Jersey
Annual housing permits and reporting coverage
- Published estimate · 2025
- 1,476
- Reported only · 2025
- 1,119
- Added by estimation · 2025
- 357
Reported and estimated units by year
| Year and source | Published estimate | Reported only | Added by estimation |
|---|---|---|---|
| 2023 Census file | 2,335 | 2,006 | 329 |
| 2024 Census file | 1,792 | 1,482 | 310 |
| 2025 Census file | 1,476 | 1,119 | 357 |
2024 to 2025 · published estimate -316 units · reported only -363 · added by estimation +47. This split describes the difference between the published columns.
What types of housing were authorized?
| Units in building | Published estimate | Reported only | Added by estimation |
|---|---|---|---|
| One unit | 710 | 640 | 70 |
| Two units | 20 | 8 | 12 |
| Three or four units | 3 | 3 | 0 |
| Five or more units | 743 | 468 | 275 |
Local housing and rent context
| Measure | Estimate and margin |
|---|---|
| Housing units · Census table B25001 | 317,979 ± 208 |
| Median gross monthly rent · Census table B25064 | $1,871 ± $20 |
| Gross rent at least 30% of income · Census table B25070 | 48.1% ± 1.6 percentage points |
| Gross rent at least 50% of income | 23% ± 1.2 percentage points |
| Estimated households with a computed rent-to-income ratio | 106,942 |
The 2025 permit estimate amounts to 4.6 authorized units per 1,000 housing units in the ACS estimate. The numerator and denominator cover different periods.
The Vintage 2025 Census housing stock estimate changed from 319,980 in 2024 to 320,245 in 2025 (+265 units). This is a separate model-based inventory estimate.
Permit offices listed under this county code
Use the office pages for their own histories and source coverage notes.
- Carteret boroughPermit office 34079000 · Middlesex County · 72 authorized units
- Cranbury townshipPermit office 34101000 · Middlesex County · 67 authorized units
- Dunellen boroughPermit office 34118000 · Middlesex County · 1 authorized units
- East Brunswick townshipPermit office 34121000 · Middlesex County · 165 authorized units
- Edison townshipPermit office 34132000 · Middlesex County · 108 authorized units
- Helmetta boroughPermit office 34218000 · Middlesex County · 34 authorized units
- Highland Park boroughPermit office 34221000 · Middlesex County · 2 authorized units
- Jamesburg boroughPermit office 34244000 · Middlesex County · 3 authorized units
- Metuchen boroughPermit office 34313000 · Middlesex County · 6 authorized units
- Middlesex boroughPermit office 34316000 · Middlesex County · 2 authorized units
- Milltown boroughPermit office 34323000 · Middlesex County · 2 authorized units
- Monroe townshipPermit office 34329000 · Middlesex County · 100 authorized units
- New BrunswickPermit office 34353000 · Middlesex County · 46 authorized units
- North Brunswick townshipPermit office 34362000 · Middlesex County · 27 authorized units
- Old Bridge townshipPermit office 34381000 · Middlesex County · 14 authorized units
- Perth AmboyPermit office 34406000 · Middlesex County · 3 authorized units
- Piscataway townshipPermit office 34412000 · Middlesex County · 66 authorized units
- Plainsboro townshipPermit office 34416000 · Middlesex County · 26 authorized units
- Sayreville boroughPermit office 34462000 · Middlesex County · 8 authorized units
- South AmboyPermit office 34479000 · Middlesex County · 2 authorized units
- South Brunswick townshipPermit office 34482000 · Middlesex County · 292 authorized units
- South Plainfield boroughPermit office 34486000 · Middlesex County · 75 authorized units
- South River boroughPermit office 34487000 · Middlesex County · 29 authorized units
- Spotswood boroughPermit office 34491000 · Middlesex County · 4 authorized units
- Woodbridge townshipPermit office 34579000 · Middlesex County · 322 authorized units
Sources and definitions
How to read these figures
- The Census Building Permits Survey counts new privately owned housing units authorized by permits. One permit can cover multiple units. The counts describe authorizations, a stage before starts and completions.
- The published estimate includes reported units and Census estimates that fill gaps. The difference is calculated from those two columns. Reported-only units can include records from approved alternative sources. A missing report can leave an office without a usable count.
- County and state totals come from their own Census files. Permit offices can cover places across county lines or areas served by another jurisdiction. The office’s county field is used for navigation.
- ACS housing inventory and rents are survey estimates for 2020–2024. Gross rent includes rent and separately paid utilities or fuels. Rent burden is the share paying at least 30% of income among cash-rent households with a computed ratio. Margins are at 90% confidence. The margin for rent burden is approximate.
- Vintage 2025 county housing stock is a separate Census series. Its model uses building-permit data alongside other inputs. Read stock change and permits as separate measures.
Public sources retrieved November 10, 2026. Building Permits Survey annual data · Survey methodology · American Community Survey data · Download the comparison