Updated Sep 4, 2026
Michael O'Sullivan Of Burlington Acquires Office Building In Philadelphia For $240 Million
3151 Market Street
$240,000,000
$544/SF
Building Size
441,000 SF
Asset Type
Office
Closing
Sep 3, 2026
About this deal
AI
An office asset located at 3151 Market Street in Philadelphia, PA, was sold for a total of $240,000,000. The property encompasses 441,000 square feet, resulting in a price per square foot of $544. The transaction was part of a strategic move by the buyer to establish their corporate headquarters in this location.
Summary of transaction details:
- Property Type: Office
- Transaction Amount: $240,000,000
- Buyer: Michael O'Sullivan - Burlington
- Seller: Jerry Sweeney - Brandywine Realty Trust
- Square Footage: 441,000
- Price per Square Foot: $544
The acquisition indicates Burlington's intention to relocate its corporate headquarters from New Jersey, which is projected to bring approximately 2,000 employees into the neighborhood along with a planned investment of $370,000,000 over a five-year period. This move is supported by a $7,000,000 forgivable city loan and job creation tax credits.
Market Office Market Snapshot
Boundary boundary · Office · Sale transactions
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Purchase Price
Annual NOI
Loan Amount
Interest Rate (%)
Loan Term (yrs)
Down Payment (%)
Cap Rate
0.07%
Cash-on-Cash
-0.02%
Monthly Payment
$14,164
Annual Debt Svc
$169,964
Annual Cash Flow
$-11,334
DSCR
0.93