statements included in this report and require the application of significant judgment by management and, as a result, are subject to a degree of uncertainty. We believe there have been no material changes to the items that we disclosed as our critical accounting policies under Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in our 2022 Annual Report on Form 10-K (the “2022 Annual Report”) for the year ended December 31, 2022.
The following discussion and analysis is intended to assist readers in understanding our financial condition and results of operations during the three and nine months ended September 30, 2023 and 2022 and should be read in conjunction with the consolidated financial statements and notes thereto included in this Quarterly Report on Form 10-Q and our 2022 Annual Report.
Results of Operations for the Three Months Ended September 30, 2023 Compared to the Three Months Ended September 30, 2022
Rental revenues in total decreased by approximately $17,000 to $1.5 million for three months ended September 30, 2023 from $1.5 million for the three months ended September 30, 2022. This consisted of an increase in rent revenues of approximately $2,000 to $1.4 million for the three months ended September 30, 2023 from $1.4 million for the three months ended September 30, 2022, offset by a decrease in tenant reimbursements of approximately $19,000 to $46,000 for the three months ended September 30, 2023 from $65,000 for the three months ended September 30, 2022. The slight decrease in total rental revenues and its related components was mainly due to lower common area maintenance fees due to the vacancy at the Paramus location during the three months ended September 30, 2023 compared to the three months ended September 30, 2022.
Other income increased by approximately $9,000 to $29,000 for the three months ended September 30, 2023 from $20,000 for the three months ended September 30, 2022. This increase is due to a slight increase in the SCA’s construction supervision fee.
Sales of residential condominium units at 77 Greenwich decreased by approximately $8.3 million to $9.2 million for the three months ended September 30, 2023 from $17.5 million for the three months ended September 30, 2022. We closed on three and six residential condominium units during the three months ended September 30, 2023 and 2022, respectively. Units that we closed during 2022 were generally lower priced, smaller units on the building’s lower floors, many of which entered into contract during the height of the pandemic.
Property operating expenses decreased by approximately $434,000 to $786,000 for the three months ended September 30, 2023 from $1.2 million for the three months ended September 30, 2022. The decrease was principally due to lower marketing and operating costs at 77 Greenwich due to 13 fewer residential condominium units having closed. This was partially offset by fewer capitalized operating costs associated with 77 Greenwich during the three months ended September 30, 2023 compared to the three months ended September 30, 2022. Property operating expenses consisted primarily of expenses incurred for utilities, payroll, COVID-19 related supplies and general operating expenses as well as repairs and maintenance and leasing commission at 237 11th, general operating expenses at 77 Greenwich, including marketing costs, and to a lesser extent expenses related to the Paramus, New Jersey property.
Real estate tax expense increased by approximately $182,000 to $668,000 for the three months ended September 30, 2023 from $486,000 for the three months ended September 30, 2022. This increase was mainly due to a higher assessed values for the unsold residential condominium units as well as less capitalized real estate tax expenses for those units at 77 Greenwich for the three months ended September 30, 2023 as compare to the three months ended September 30, 2022.
General and administrative expenses increased by approximately $80,000 to $1.5 million for the three months ended September 30, 2023 from $1.4 million for the three months ended September 30, 2022. For the three months ended September 30, 2023, approximately $79,000 related to stock-based compensation, $609,000 related to payroll and payroll related expenses, $464,000 related to other corporate expenses, including board fees, corporate office rent and insurance and $359,000 related to legal, accounting and other professional fees. For the three months ended September 30, 2022, approximately $118,000 related to stock-based compensation, $628,000 related to payroll and payroll related expenses, $441,000 related to other corporate expenses, including board fees, corporate office rent and insurance and $244,000 related to legal, accounting and other professional fees.
Pension related costs remained relatively flat at $144,000 for the three months ended September 30, 2023 compared to $158,000 for the three months ended September 30, 2022. These costs represent professional fees and other periodic