Tax bills are set to go up slightly in Edgartown, as the selectmen Monday approved an estimated tax rate of $3.55 per thousand dollars of property valuation, a 12 cent increase from last year’s rate.

Principal assessor Jo-Ann Resendes said the average single-family home value in Edgartown decreased by about $15,000, going from $1,131,700 to about $1,116,800.

Thus, the average tax bill would increase from $3,882 to $3,965, about $83. The tax rate still has to be approved by the state Department of Revenue.

Ms. Resendes said about a third of the 12 cent increase can be attributed to the drop in home value, and the other eight cents address an increase in the tax levy.

The selectmen approved a single tax rate for residential and commercial properties.

In other business Tuesday, selectmen approved an additional employee for the Edgartown ambulance. Fire chief Peter Shemeth said that with a “huge” overtime budget, a new employee would benefit the town by reducing the overtime budget and allowing more versatility in staffing.

“It sounds like a win-win for the town,” selectman Arthur Smadbeck said, noting that the town will pick up some additional revenue and the ambulance will be able to better provide services.