Arapahoe building permits can include open-space use tax

A building permit in Arapahoe County is part construction paperwork and part tax event, and the second part catches people off guard. When you pull a permit within the county, the Public Works Department also collects an open-space use tax — the money that helps fund parks, trails, and protected land across the county. It is figured from the valuation of the work, so a bigger project carries a bigger tax bite.

The valuation piece is what makes this easy to miss. A finished basement, an addition, a new deck: each gets a dollar value at the permit counter, and the use tax rides on top of that number alongside plan review and inspection fees. None of it shows up in a lumber estimate or a contractor’s labor quote. It lands when the permit is issued.

That is exactly where two contractor bids can mislead you. If one builder folds permit costs into the price and the other leaves them for you to pay at the counter, the cheaper-looking bid may not be cheaper at all once the use tax and fees are added. Before you sign, ask each bidder plainly: are permit taxes and fees included in this number, or do I owe them separately?

The county’s sales tax page lays out how the open-space use tax is figured, and Public Works and Development is the right place to send permit, fee, and approval questions. A short call before the work starts beats a surprise line item when the permit is ready.