Basement bedrooms can count toward your room count and the square footage of your home on an appraisal if they’re fully legal, which means they have proper ventilation and points of egress, as defined by your local building code. Simply partitioning off a space for a bedroom in an otherwise unfinished basement that isn’t a legal living space won’t affect your appraisal value.

If installing board and batten fixes an issue with the home, it could increase the value, but it isn’t commonly installed for that purpose. Board and batten is an aesthetic choice and, like most aesthetic choices, will do little to raise your home’s value. That being said, certain design elements can help attract more buyers, even if your home’s price won’t see a noticeable bump. 

In most cases, installing a tennis court on your property will drive up your property taxes. Property taxes are determined, in part, based on improvements made to your property, which includes anything with a permanent foundation. Since most home tennis courts include a large concrete foundation, your property taxes will likely increase following the installation. A general rule of thumb is that if your project requires permits—like for a foundation or fencing for a tennis court—then your property taxes will be affected.

Depending on the size of the home, the appraisal itself can take several hours. After the appraiser’s visit is complete, it can take between a few days and a few weeks to get the report back. This timeline is largely dependent on the appraiser’s workload, research requirements, efficiency, and other factors.