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.

A property valuation, sometimes called a comparative market analysis or CMA, provides a real estate expert’s opinion on how much your property will sell for. It takes many things into consideration, like the condition and location of the home, but ultimately, all that matters for a property valuation is what a buyer might be willing to pay for the property. An appraisal is more concerned with determining the value. A valuation is to estimate what you’ll get for a property, while an appraisal helps a lender establish loan-to-value ratios and loan amounts.

In short, yes, a pond can add to your home’s value. However, whether it adds value will depend on the condition and aesthetic of your pond. Having this feature already built into a yard’s home can be appealing to homebuyers who value its aesthetic and would prefer not to build it themselves. But if it is not kept in good condition, it could turn buyers away.

In most cases, selling a home in as-is condition will lead to a sale price that’s somewhere between 10% and 30% lower than normal. However, it’s often worthwhile to sell at a loss because the alternative would be to pay for the repairs yourself, which could end up costing you more. Even if they didn’t, selling as-is saves you from the time and energy you’d spend coordinating the repairs.