New Castle County · Middletown · #2025-04-08
St. John Properties Middletown Site
1023 Bunker Hill Road, Middletown, DE 19709, Middletown, DE · 445 homes, 215,520 sq ft non-residential, mixed use · 75.0 acres
About this project
A subdivision of about 445 townhomes and 215,520 square feet of flex space on roughly 75 acres at Bunker Hill Road in Middletown.
Official description: Proposed 445+/- townhomes with 215,520 S.F. of flex space
- Owner
- Maple Grove Associates, LP
- Engineer / designer
- Dana Dunphy
- Plan type
- Subdivision
- Land use
- Residential/Flex Space
- Zoning
- R3/C3 → R3/C3
- Water
- Artesian Water
- Sewer
- Municipal
- Status
- Complete
The full picture AI research · Nov 1, 2026
St. John Properties, a commercial developer based in Maryland, is planning a mixed-use project called Middletown Exchange on about 75 acres off Bunker Hill Road in Middletown. County records describe roughly 445 townhomes and about 215,520 square feet of flex space. Flex space means single-story buildings that combine offices with warehouse or light-industrial areas.
The developer's announcements give slightly different figures: about 450 homes and 225,000 square feet of flex, research and retail space. The first phase is two flex buildings totaling 96,000 square feet, with construction expected to start in spring 2026 and finish in early 2027. More buildings depend on tenant demand.
The developer describes the homes as already approved. It says it wants a partner to buy the residential land and build them. This is the company's first Delaware project. The site is next to US Route 301. No opposition was found.
What it could mean nearby
- The developer expects the commercial buildings to support more than 600 jobs once complete.
- Up to about 450 new homes would add residents, traffic, and demand for schools and utilities. The sources give no details on these effects.
- The site is next to US Route 301, which could affect how traffic reaches the area. No traffic study was found.
Where it stands
The developer's January 2026 announcement describes the homes as approved and the first commercial phase as headed for construction. The county's latest filing is dated April 2025. The usual next steps are building permits and construction. Home construction waits for a builder to buy the residential land.
- Jan 2026 The developer announced the Middletown Exchange project and its first Delaware site, with phase one construction expected in spring 2026
- Apr 1, 2025 Latest county planning filing for the site
- Dec 2024 A state planning review agenda listed 1023 Bunker Hill Road in Middletown
Want to weigh in? The Town of Middletown is the likely approving body for building permits and site details, and residents can contact it or attend its public meetings. A specific hearing was not found.
Who's behind it
St. John Properties · A Maryland-based commercial real estate developer that builds flex, office, and research buildings, and is entering Delaware with this project.
Around the web
- St. John Properties Enters Delaware with Acquisition of 75-Acre Site in MiddletownSt. John Properties · Jan 21, 2026The developer describes the 75-acre mixed-use plan, the first phase, the 450 homes it calls approved, and its search for a residential partner.
- St. John Properties Crosses Into DelawareCommercialSearch · Jan 23, 2026Trade coverage confirms the 75-acre project, the phase one sizes, and the spring 2026 construction start.
- State planning review agenda, December 2024Delaware Office of State Planning Coordination · Dec 18, 2024The agenda lists a review of 1023 Bunker Hill Road in Middletown, though the entry names no developer.
Planning terms explained
- Flex space
- Single-story buildings that mix office space with warehouse or light-industrial space.
- Subdivision
- The division of a larger parcel of land into smaller lots for homes or buildings.
- Mixed use
- A development that combines homes with businesses or other non-residential buildings.
- Speculative building
- A building constructed before a tenant has signed a lease.
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: $305.2M
- ~14,240 roofing squares
- ~445 HVAC systems
- ~445 kitchens / 890+ bathrooms
- ~1,246,000 sq ft of finished living space
- ~718 roofing squares (assumes 3 stories)
- ~538 tons of cooling (rule of thumb 400 sq ft/ton)
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