Thank you, David, and good morning. In the second quarter, the strong momentum that has been building in our operating asset segment continued with the delivery of $68 million in net operating income, a 3% increase from the same quarter last year. On a same-store basis, NOI increased 4% year-over-year with meaningful growth in our office and multifamily portfolios. We also experienced strong leasing activity across the stabilized portfolio with year-over-year and sequential improvement in lease percentages in each of our 3 core property types.
Most significant improvement was seen in our office portfolio, which generated second quarter NOI of $34 million. This reflected a $4 million or 13% year-over-year improvement and was primarily the result of a onetime lease termination fee, strong lease-up activity and rent abatement expirations in The Woodlands. These increases were partially offset by some lease expirations at some of our older assets in Downtown Columbia.
Similar to recent quarters, our premier Class A office assets continued to outperform the market as companies continue to prioritize highly amenitized workspaces in desirable locations. In the quarter, we executed new or expanded office leases totaling nearly 200,000 square feet, including 167,000 square feet just in The Woodlands. We also renewed over 180,000 square feet of office space during the quarter. This strong leasing performance brought our stabilized office portfolio to 89% leased at quarter end, substantially higher than market when compared to the surrounding metro regions of Houston, Las Vegas and Baltimore and Washington.
Multifamily portfolio delivered record quarterly NOI of $13 million, representing a 10% year-over-year improvement.
This growth was primarily driven by 6% average in-place rent growth and favorable contributions from Starling at Bridgeland and Marlow, our newest multifamily developments. Both of these properties, which were fully completed less than one quarter ago, are exceeding expectations with Starling already 80% leased and Marlow 47% leased.
Overall, our stabilized multifamily properties finished the quarter at 98% leased with Downtown Columbia at 99%, Houston at 97% and Summerlin at 96%. In retail, second quarter NOI was just under $13 million, reflecting an 11% reduction compared to the prior year. This decline was primarily related to onetime COVID-related recoveries at Ward Village in the prior year as well as the closure of 2 Ward Village retail centers to make way for the Park and Ulana condominium projects. Despite this reduction, our retail portfolio performed well and was 96% leased at quarter end, representing a 3% year-over-year improvement.
With that, I will now turn the call over to our President, Jay Cross.