The purpose of the bathroom will dictate which bath design you opt for. You don't want to spend a lot of money on a jacuzzi tub for a child's or guest bathroom. However, if you're a bath lover, then investing in a jetted or soaking tub that will be used every day is money well spent.

Beautiful bathrooms don't necessarily have to be expensive. You can choose from basic tub styles and then decorating bathrooms is as easy as adding gorgeous show curtains, stylish shower caddies and plush towels that coordinate with your color schemes.

You must also consider the available space and what it will take to install the tub. Check to see if additional carpentry will be required for installation and find out how much the tub will weigh when it's full. A tub full of water must be adequately supported, so check your framing.

Cast-iron tubs, whirlpools, soaking and sunken tubs often require additional support. A tub sized for more than one person will put additional demands on the home's hot water heater too, so you may also require an upgrade or a separate water heater.

Besides the common rectangular shape, tubs also come in corner, oval, circular and freestanding styles. Built-in tubs can be alcove, drop-in or corner style. An alcove tub is standard in most homes and are often tub-shower combinations with waterproof surrounding walls.

Drop-in tubs can be sunken into the floor or a tub deck. Drop-in models that are mounted into their own frame or deck will require additional carpentry or framework, which can add to the overall cost.

Corner model built-ins are installed in the corner, with surrounds on two sides. A free-standing tub has legs or ball-and-claw feet. These tubs frequently have rolled edges and slipper backs for soaking.

There is a variety of tubs to choose from, so test a bathtub for comfort before you buy. A soaker tub should holds 15 to 20 inches of water, but it's likely that you'll need additional plumbing fixtures. Most tubs are made of porcelain on steel because of its durability.

Fiberglass is a cheaper option, but it's not as durable. If you really want a tub that will be a showpiece in your bathroom, as well as a great home addition, then have a look at cast iron, solid surfacing and natural stones. Whether you're looking for functional or fabulous, the right bath design will be the cornerstone of your room.