Nicholas Hilton
Management
Thank you, Marshall. Before I get into our leasing results, I'd like to quickly touch upon our continued response to the ongoing COVID-19 pandemic. All the protocols discussed in my last quarter's remarks have been implemented portfolio-wide, including increased and expanded cleaning procedures, augmented ingress and egress plans to limit crowding, limited elevator capacity and mandatory mask use in common areas. We take the health and safety of our tenants, coworkers and operation staff very seriously.
Together with our property management team, we continue to take all the necessary precautions to ensure a safe, secure and clean environment as the tri-state area begins to transition into the reentry phase. We have also kept all of our buildings open and operational for our tenants throughout this crisis.
From a new leasing perspective, we continue to make progress portfolio-wide, signing just over 155,000 square feet in the second quarter. This resulted in our core and waterfront portfolio finishing at 80.3% leased at quarter-end. Of these transactions, approximately 6% or 10,000 square feet were new leases, and 94% or 145,000 square feet were in-place renewals.
Across all core markets, our rents on second quarter leasing rolled up 3.6% on a cash basis and 12.9% on a GAAP basis. As we turn our focus to the specific markets, the Waterfront closed approximately 55,000 square feet of transactions, finishing the second quarter at 78.6% leased. We are pleased to see increases of 8.5% on a cash basis and 18.6% on a GAAP basis over these deals.
While the pandemic has paused many of our discussions, we still have approximately 200,000 square feet of transactions currently in negotiations across a diverse tenancy mix, including technology, financial services and insurance. Looking ahead, we have a limited amount of lease roll with just over 54,000 square feet expiring on the Waterfront through the end of the year.
Turning to the performance of our suburban portfolio. In the second quarter, we executed over 101,000 square feet while achieving positive rent increases of 1.2% on a cash basis and 10.3% on a GAAP basis. For the remainder of the year, we have over 118,000 square feet expiring in our suburban portfolio, of which approximately 91,000 square feet pertain to assets that are under contract to be sold by year's end, subject to any unforeseen delays from the pandemic. And of the remaining 27,000 square feet rolling, we expect to renew approximately 20,000 square feet as we move ahead.
With that, I'd like to turn the call over to David.