Selling your home? Make sure to avoid this common faux pas.

If you're having a hard time selling your home, this room could be preventing your property from finding happy buyers: The dark room.

We're not talking about a chemical-y nook where you develop film. Rather, a poorly-lit room in your residence can be a big deterrent for potential buyers and even bring down your home's value. As Desare Kohn-Laski, broker and owner of Skye Louis Realty in Coconut Creek, FL tells in a recent article, a dark room is indeed one of the biggest turnoffs for buyers.

"The reason is simple: No one wants to walk into a home and feel like they're trapped in a dungeon. Even if the rest of the house is flooded with light, one dark room can make a whole house seem dark," explains the article's writer Margaret Heidenry.

Thankfully, the fixes to upgrade that dingy room are simple and sometimes free. First, when showing your home, be sure to open up all curtains or blinds in the room. Got an extra house plant or mirror lying around in a well-lit room or storage? Relocate it to the dark room and you'll be amazed at what a difference it can make.

If you've got more time and some money to spare, you can consider painting the room a lighter color and improving the lighting. Heck, even if you're not selling your home, you'll be amazed at what a world of difference these changes can make.