Year-over-year net income at Newton-based, senior living-focused REIT Senior Housing Properties Trust inched up 1.8 percent in the first quarter, as rental revenues and income from fees and services soared.

The company reported net income of more than $32.35 million in the first quarter, compared to net income of approximately $31.78 million for the same period last year. Total revenues jumped to $145.07 million in the first quarter, from $98.55 million at the beginning of 2011. Of that, rental income rose more than 11 percent to $109.5 million, with income from resident fees and services contributing approximately $35.57 million.

In the first quarter of 2011, rental income totaled $98.55 million, according to a statement. The bank did not report fee and service income in the first quarter last year.

The rise in revenues was partially offset by a more than 90 percent spike in expenses, to $84.16 million from $44.23 million last year. Property operating expenses almost tripled year-over-year in the first quarter, to $39.33 million from $10.43 million last year.

Since Jan. 1, the company has acquired, or is currently under agreement to acquire, 14 properties for total purchase prices of approximately $340.5 million, including the assumption of approximately $113.9 million of mortgage debt and excluding closing costs.

The company said it expects to pay off 17 mortgage loans today with a weighted average interest rate of 6.95 percent encumbering 17 properties for approximately $32.8 million, including accrued interest. The loans are all expected to mature in June and July.