When renovating for a customized living area, we highly recommend you work closely with your builder in order to make your vision come to life. Man Caves are incredibly popular additions to existing households, and generally can be created via a simple add on or basic renovation of an existing living space. 
Basements, unused office space, dens, and even garage areas are all ideal for conversion and offer existing structure to customize. When planning, you want to think about a few major details in advance to help you bring your ideas to life- which is why we’ve put together a series of tips you need to take into consideration. 
Plan for Electrical and Plumbing
If you have, or plan to add new electrical solutions and plumbing, then you have to take care of this before all else. Both are bound by specific building codes  and so you will need to plan your larger decor around these areas. This will dictate the placement of various things, such as televisions, lighting, bar spaces, and outlet dependent systems. 
Pick a Theme
It’s not like you need to stick to a strict theme, but your interior design should flow. For example, if you have reserved a wall for hunting mounts, you may prefer a more rustic feel and take advantage of warm wood tones. If showcasing a tactical gun collection is your jam, then you might want to place that sweet Blackout Pistol along a sheet metal wall mount to highlight its awesome detail. The same idea goes for hanging collectible signs, or other items- such as guitars. In short, choose the colors and style to match what you want to be surrounded by. 
Match Your Furniture for Mood and Comfort
Following along with the idea of an overall theme, you need to pick and choose your furniture not only for the space it fits within, but also for your own overall comfort- and the mood it can influence. Did you know the colors, style, and arrangement of furniture can influence mood? Obviously you want your man cave to be a place you can escape to, relax in, and entertain. You don’t want it to be a source of frustration or distraction. 
Make sure to pick what you are naturally drawn to and don’t pick out items based on popularity or settling because nothing else is available. Often it is worth waiting to find the perfect piece. 
Integrate a Central Gaming Area
Whether you prefer billiards, fussball, darts, or arcade- be sure to plan your electrical needs and lighting around their placement. Also, if room allows, consider keeping your gaming area somewhat separate from general entertainment so guests and family can enjoy both without getting in one another’s way. 
With proper planning and a good builder, gaming areas can be easily separated from the rest of the room with a simply raised platform, or recessed floor. This helps provide a visual separation without creating a barrier. If you want, you could even use a bar space between the two. 
Keep Your Entertainment Space Open and Uncluttered
Your entertainment area should be open and uncluttered, and provide a clear view of your television (or televisions). This is most likely doubling as a lounging area as well, and a good place to read a book, or sit around and converse over drinks and cigars. You want it inviting and relaxing, which is why your furniture choice, as mentioned above, is so important. Keep all these details in mind and have a good idea of square footage so as to pick and choose the proper seating arrangements and coffee table or other types of surfaces. 
Consider a Built in Bar and/or a Humidor
Even a small bar and walk-in closet humidor is worth the investment if you have the room. Get all those liquor bottles and beers out of your main house refrigerator and have them set up and easy to serve as they were designed to be. Even if you aren’t a big drinker, you can absolutely set up a coffee and espresso machine, have a small fridge for sodas and other cold drinks, and  more or less create your own social space.
Consider Heating and Cooling
If your area is already a part of a central heating and cooling system, then you are all set! But if this is an add on or you have renovated an outside space, such as a garage, then you might want to consider how to best provide climate control. 
New ductwork for an addition onto your house will need to be done by a professional, and it might be a bit much for an existing system. Your electrician will know and can give you suggestions to find the best solution. Outside areas might be best taken care of with swamp coolers or portable air cooling units and fans, while heating can be offered via electrical solutions- such as infrared systems. 
Conclusion
Building or renovating a man cave style living and entertaining space can be an awesome venture. Be sure to always communicate with your builder about what it is you want and need, and work with a decorator to help showcase those things you feel belong in your room. Pay particular attention to your floor layout and avoid clutter, and choose our furniture based on comfort and its ability to work with your overall theme for a truly relaxing space.