Warren County · Hackettstown Town · #24-437
Storage building, 999 Willow Grove St
999 Willow Grove St, Hackettstown Town, NJ · 50,050 sq ft non-residential, warehouse & storage
About this project
A new moderate-hazard storage building of about 50,050 sq ft is proposed at 999 Willow Grove St in Hackettstown Town.
Official description: Storage building, moderate hazard; reported construction cost $2,157,000
- Plan type
- Building permit (new construction)
- Land use
- Storage building, moderate hazard
- Status
- Certificate
Filing history
- 2024-10-02 · #24-437 · Building permit (new construction) · 50,050 sq ft
The full picture AI research · Nov 1, 2026
County records describe a new storage building of about 50,050 square feet at 999 Willow Grove St in Hackettstown. It was classed as a moderate-hazard storage use, meaning the goods kept inside carry some fire risk.
Trade press reports describe what appears to be the same project. A developer bought a roughly 9.5-acre site there and built a one-story industrial building of about 50,000 square feet. It has tall ceilings, four loading doors and about an acre of outdoor storage. A smaller, older industrial building had previously stood at the address.
In January 2026 the finished building was reported sold for $13 million to a Brooklyn-based mobile accessories maker. No news of opposition was found. No local hearing records were found either.
What it could mean nearby
- The site is under two miles from Route 46 and under five miles from Interstate 80, so truck traffic likely uses main roads, according to trade reports.
- Four loading doors suggest regular truck deliveries.
- An owner-occupant could bring jobs, but no hiring figures were found.
Where it stands
Press reports say the building has been built and sold, so approvals appear to be finished. The latest county filing is dated 2024-10-02. Remaining steps are usually final inspections and occupancy by the new owner.
- Jan 2026 Sale of the finished building for $13 million reported
- Oct 2, 2024 Latest county planning filing
Want to weigh in? Hackettstown's planning board handled land-use applications, but the project appears to be built. Residents with questions can contact the town clerk or planning board.
Who's behind it
Saddleback Real Estate Developers · A New Jersey developer of industrial buildings that built and sold this Hackettstown warehouse.
Around the web
- Saddleback Real Estate Developers completes $13M sale of Hackettstown industrial buildingROI-NJ · Jan 7, 2026Reports the developer's completed sale of the new Hackettstown industrial building.
- Saddleback sells new 50,000 sq. ft. industrial building in Hackettstown for $13 millionReal Estate NJDescribes the building at 999 Willow Grove St and its sale.
- New Hackettstown industrial building sells for $13MNJBIZGives the building's features and the buyer.
- Saddleback Sells Industrial Building in Hackettstown, New Jersey for $13MREBusiness OnlineConfirms the sale and the site's highway access.
Planning terms explained
- Moderate-hazard storage
- A building code category for storing goods that burn at a moderate rate, which sets fire-safety requirements.
- Clear height
- The usable vertical space inside a warehouse, from floor to the lowest overhead obstruction.
- Site plan
- A drawing and review showing how a property's buildings, parking, drainage and landscaping will be laid out.
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: $6.5M
- ~500 roofing squares (assumes 1 story)
- ~125 tons of cooling (rule of thumb 400 sq ft/ton)
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