Warren County · Washington Borough · #WB-26-00111
290 E Washington Ave
290 E Washington Ave, Washington Borough, NJ · 21,828 sq ft non-residential, office
About this project
A new business-use building of about 21,828 sq ft is proposed at 290 E Washington Ave in Washington Borough, Warren County.
Official description: Business Uses; reported construction cost $13,793,546
- Plan type
- Building permit (new construction)
- Land use
- Business Uses
- Status
- Permit
Filing history
- 2026-05-28 · #WB-26-00111 · Building permit (new construction) · 21,828 sq ft
- 2025-12-09 · #WB-25-00310 · Building permit (new construction) · 69,000 sq ft
The full picture AI research
A new business-use building of about 21,828 square feet is proposed at 290 E Washington Ave in Washington Borough, Warren County. County records classify it as office space. That is roughly the size of a mid-sized professional or medical office building.
The county records do not say what currently stands on the site, who would occupy the new building, or how many floors it would have. No news coverage, borough meeting items, or developer project page specific to this address was found online, so nothing is known about approvals or opposition.
What it could mean nearby
- Office use usually means more weekday car trips and a need for parking, but no traffic study was found for this site.
- The building could bring jobs to the E Washington Ave corridor, though the number and type of jobs are unknown.
Where it stands
The latest county filing is dated 2026-05-28. No local approval has been found online. Projects like this usually go to the borough's land use board for site plan review, and then to construction permits if approved.
- May 28, 2026 Latest filing in the county planning records
Want to weigh in? The Washington Borough Land Use Board normally reviews site plans for projects like this. Residents can usually comment at its public meetings, which are listed on the borough's website.
Planning terms explained
- Site plan
- A detailed drawing showing where a building, parking, driveways and landscaping would go on a property.
- Land use board
- The local board that reviews development applications and decides whether they meet zoning rules or need exceptions.
- Non-residential square footage
- The total floor area of a building used for business rather than housing.
We searched the web for this project but found nothing beyond the county record, so this explanation is based on the filing alone. Researched by AI from public sources on Nov 1, 2026. It can make mistakes, so check the linked sources and the municipality before relying on it.
Scope estimate for contractors
Estimated construction value: $4.4M
- ~218 roofing squares (assumes 1 story)
- ~54 tons of cooling (rule of thumb 400 sq ft/ton)