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3151 Market Street

Updated Sep 4, 2026

SOLDOffice

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.

Players

Michael O'Sullivan

Burlington Distribution

Buyer

$497M

vol

5 deals

Buyer

Market Office Market Snapshot

Boundary boundary · Office · Sale transactions

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Deal FAQ

About $544 per square foot on a published $240M for 441,000 square feet (2026).

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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

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