There are two basic designs for a “half bath” which consists
of just a sink and toilet. They can be mounted side by side or opposite each
other. The side-by-side design can fit in a room that is 5’ x 4’, but 5’ x 5’
provides a much better space.
When the toilet and sink are mounted opposite each other
they will fit in a room that is 3’x 7’. This is a space saving design because
it only requires 21 square feet as opposed to the 25 square feet in the design
above.
A Basic “Full Bath” Design
The most common position for the tub is at one end of the bathroom with the
tub faucets on the same side as the sink and the toilet. This minimizes the
amount of piping required and makes the design economical. The required room
dimensions are 5’ wide (for a 60”tub) x 8’ long. A 3’ wide tub will fit in this
size room that requires 40 square feet.
This is the most commonly designed bathroom because it uses the least amount
of floor area and therefore saves costs on finishes and overall construction.
Plan variations
Many designs these days add two sinks. These are often mounted in a counter
but can be two pedestal sinks mounted side by side as well. These two sinks
usually require 60” of counter space or wall space so they are often placed on
the wall opposite the tub.
This design requires a room that is 5’ wide x 9’ long and requires 45 square
feet. The counter can be Plastic laminate, Tiled, Corian or Stone.A Shower
instead of a Tub.
A shower is often square and measures 32” x 32” at a minimum. This can be
used instead of a tub and can be placed where the tub would normally be. This
design fits in a room that is 5’ x 8’. If the shower is bigger than 32” x 32”,
the room will need to be wider than5’ and allow for at least 28” in front of
the shower door. Therefore a 36” square shower will require a room that is
5’-6” wide.
Another option for a shower is the corner type. This shape allows the design
to be more compact and uses less floor area than a square shower. Often the
toilet and sink are then placed on either side of the corner shower to make the
design more compact.
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This corner design only uses 30 square feet, which is slightly larger than a
“half bath”making it a great choice where space is very limited.