As of December 31, 2022 and 2021, the gross carrying value of the operating properties was as follows (in thousands):


	December 31, 2022		December 31, 2021
Land	$	403,998	$	410,144
Building and improvements	2,760,357		2,653,492
Tenant improvements	452,885		408,966


Total	$	3,617,240	$	3,472,602

Internal direct construction costs totaling $9.3 million in 2022, $7.9 million in 2021, and $8.4 million in 2020 and interest totaling $4.7 million in 2022, $7.0 million in 2021, and $4.6 million in 2020 were capitalized related to the development, redevelopment and construction of tenant improvements of certain properties and land holdings.

During the years ended December 31, 2022, 2021 and 2020, the Company’s internal direct construction costs are comprised of capitalized salaries. The following table shows the amount of compensation costs (including bonuses and benefits) capitalized for the years presented (in thousands):

Property/Portfolio Name

Acquisition Date

Location

Property Type

Rentable Square Feet/Acres

Purchase Price

631 Park Avenue

January 21, 2022

King of Prussia, PA

Land

3.3 acres

3,650

3151 Market Street (a)

April 29, 2022

Philadelphia, PA

Leasehold Interest

0.8 acres

27,349

(a)On April 29, 2022, the Company acquired, through a 99-year ground lease, the leasehold interest in a 0.8-acre land parcel, located at 3151 Market Street, in Philadelphia, Pennsylvania. The Company prepaid $19.5 million of the ground lease, representing 500,000 square feet of buildable floor to area ratio (“FAR”) to be used for the development of 3151 Market Street, and paid $7.8 million for 200,000 square feet of FAR density usable pursuant to the Schuylkill Yards Project master development agreement. The additional density is included in prepaid leasehold interests in land held for development in the consolidated balance sheets. See below regarding disposition of 500,000 square feet of FAR.

Property/Portfolio Name

Acquisition Date

Location

Property Type

Rentable Square Feet/Acres

Purchase Price (a)

155 King of Prussia Road

February 27, 2020

Radnor, PA

Land

7.75 acres

11,250

1505-11 Race Street

November 5, 2020

Philadelphia, PA

Office

119,763

9,700

250 King of Prussia Road (b)

November 30, 2020

Radnor, PA

Office

169,843

20,250

The Company accounted for the acquisition of 1501-11 Race Street as an asset acquisition and therefore capitalized $0.3 million of acquisition related costs. The Company utilized a number of sources in making estimates of fair value (including comparative sales transactions and market leasing assumptions) for purposes of allocating the purchase price to tangible and intangible assets acquired The acquisition values have been allocated as follows (in thousands):


	1505-11 Race Street
Building, land and improvements	$	9,723
Intangible assets acquired	2,422
Below market lease liabilities assumed	(2,193)
Total unencumbered acquisition value	9,952
Amortization period of intangible assets	1.5 years
Amortization period of below market liabilities assumed	1.5 years


Property/Portfolio Name	Disposition Date	Location	Property Type	Rentable Square Feet/Acres	Sales Price		Gain/(Loss) on Sale (a)
200 Barr Harbor Drive	November 22, 2022	West Conshohocken, PA	Office	86,000	$	30,500	$	8,740
11501 Burnett Road (h)	July 29, 2022	Austin, TX	Land	4.7 acres	$	32,513	$	8,340
3151 Market Street (g)	July 14, 2022	Philadelphia, PA	Leasehold Interest	0.8 acres	$	30,394	$	2,583
Gibbsboro Portfolio (f)	June 28, 2022	Gibbsboro, NJ	Office/Land	42,809/4.0 acres	$	4,100	$	831
25 M Street (e)	April 14, 2022	Washington, D.C.	Land	0.8 acres	$	29,675	$	3,836
Gateway G & H	January 20, 2022	Richmond, VA	Land	10.0 acres	$	1,600	$	897
1100 Lenox Drive	September 8, 2021	Lawrenceville, NJ	Land	5.0 acres	$	2,575	$	68
2100-2200 Lenox Drive	July 6, 2021	Lawrenceville, NJ	Land	35.2 acres	$	8,900	$	842
3025 JFK Boulevard	February 2, 2021	Philadelphia, PA	Leasehold Interest	1.0 acre	$	34,800	$	2,000
Mid-Atlantic Office Portfolio (b) (d)	December 21, 2020	Various	Office	1,128,645	$	192,943	$	15,164
One and Two Commerce Square (c)	July 21, 2020	Philadelphia, PA	Office	1,896,142	$	115,000	$	271,905
Keith Valley	June 15, 2020	Horsham, PA	Land	14.0 Acres	$	4,000	$	201
52 East Swedesford Road	March 19, 2020	Malvern, PA	Office	131,077	$	18,000	$	2,336

(b)The Company sold a 60% equity interest in a portfolio of twelve suburban office properties containing an aggregate of 1.1 million square feet (“Mid-Atlantic Office Portfolio”), nine of which are located in the Pennsylvania suburbs and three of which are located in Maryland, to an unrelated third party for a gross sales price of $192.9 million. The transaction resulted in deconsolidation of the properties and formation of PA/MD NNN Office JV, LLC (“Mid-Atlantic Office JV”). The Company recorded its investment at fair value and recognized a gain of $15.2 million in “Net gain on disposition of real estate” on the consolidated statements of operations. See Note 4 “Investment in Unconsolidated Real Estate Ventures,” for further information.

(c)The Company sold a 30% preferred equity interest in two office buildings located in Philadelphia, Pennsylvania, to an unrelated third party for $115.0 million (the “Commerce Square Venture Transaction”), which resulted in deconsolidation of the properties and formation of Brandywine Commerce I LP and Brandywine Commerce II LP (collectively, the “Commerce Square Venture”). The transaction valued the properties at $600.0 million. The Company recorded its investment at fair value and recognized a gain of $271.9 million in “Net gain on disposition of real estate” on the consolidated statements of operations. See Note 4 “Investment in Unconsolidated Real Estate Ventures,” for further information.

(d)The sales price includes $4.1 million of variable consideration held in escrow that will be released to the Company over a six to nine month holdback period if certain tenants remain in compliance with certain payment terms of their lease agreements. The Company estimated the amount of the variable consideration that it deemed probable of collection and included such amount in the transaction price. The amount estimated as probable of collection was received during 2021. The Company will continue to evaluate the probability of collection on the remaining holdback and recognize any changes to the amount deemed probable as incremental gain on sale.

(g)On July 14, 2022, the Company contributed 500,000 square feet of FAR relating to its 99-year prepaid leasehold interest at 3151 Market Street in Philadelphia, Pennsylvania, acquired on April 29, 2022, to a newly formed joint venture with an unaffiliated third party. The Company's initial deemed contribution in the project was $30.4 million and the transaction resulted in deconsolidation of the property and conversion of Brandywine 3151 Market, LP, (formerly a wholly-owned subsidiary of the Operating Partnership) to a real estate venture (“3151 Market Street Venture”). The Company recorded its investment at fair value and recognized a gain, net of transaction costs, of $2.6 million, in “Net gain on sale of undepreciated real estate” on the consolidated statements of operations. See Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information.

(h)On July 29, 2022, the Company contributed a 4.7 acre parcel of land held for development at 11501 Burnet Road in Austin, Texas to a newly formed joint venture with an unaffiliated third party. The project is part of the Uptown ATX master development. The Company's combined contributed initial land investment in the project was $32.5 million and the transaction resulted in the deconsolidation of the property and formation of Brandywine Uptown Office LLC and Brandywine One Uptown Multifamily LLC, (together, “One Uptown Ventures)”). The Company recorded its investment at fair value and recognized a gain of $8.3 million in “Net gain on disposition of real estate” on the consolidated statements of operations. Gain on sale of $8.3 million is calculated as the difference between the estimated relative sales value of the contributed land and the estimated total cost allocations per block. See Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information.

In addition, on February 2, 2021, the Company contributed its investment in a 99-year prepaid leasehold interest in a one-acre land parcel held for development at 3025 JFK Boulevard in Philadelphia, Pennsylvania to a newly formed joint venture with an unaffiliated third party. The project is part of the Schuylkill Yards master development. The Company's investment in the project was valued at $34.8 million and the transaction resulted in deconsolidation of the property and conversion of Brandywine Opportunity Fund, L.P. (formerly a wholly-owned subsidiary of the Operating Partnership) to a real estate venture (“3025 JFK Venture”). The Company recorded its investment at fair value and recognized a gain of $2.0 million in “Net gain on sale of undepreciated real estate” on the consolidated statements of operations. See Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information.

On July 14, 2022, the Company contributed 500,000 square feet of FAR relating to its 99-year prepaid leasehold interest at 3151 Market Street in Philadelphia, Pennsylvania, acquired on April 29, 2022, to a newly formed joint venture with an unaffiliated third party. The Company's initial deemed contribution in the project was $30.4 million and the transaction resulted in deconsolidation of the property and conversion of Brandywine 3151 Market, LP, (formerly a wholly-owned subsidiary of the Operating Partnership) to a real estate venture (“3151 Market Street Venture”). The Company recorded its investment at fair value and recognized a gain, net of transaction costs, of $2.6 million, in “Net gain on sale of undepreciated real estate” on the consolidated statements of operations. See Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information.

Subsequent to December 31, 2022, the Company contributed an additional 200,000 square feet of FAR density, usable pursuant to the Schuylkill Yards Project master development agreement to the 3151 Market Street Venture pursuant to amendment to the partnership agreement. The Company deconsolidated the prepaid ground lease of $7.8M and recorded its investment in the 3151 Market Street Venture at fair value and recognized a gain, net of transaction costs, of $0.8 million.

During the year ended December 31, 2022, the Company recognized an impairment loss totaling approximately $4.7 million on a property located in the Metropolitan Washington, D.C. segment. The Company’s estimated fair value, is considered Level 3 in accordance with ASC 820, and was based on a pending offer form a third party to acquire the property and the subsequent execution of a purchase and sale agreement.

As of December 31, 2021, the Company determined that the sale of two adjacent parcels of land within the Other segment totaling 10.0 acres was probable and classified these properties as held for sale. As such, $0.6 million was classified as Assets held for sale, net” on the consolidated balance sheets. The Company closed on the sale of the two parcels of land on January 20, 2022 for an aggregate sales price of $1.6 million.