If a Loft Conversion or House Extension is not an option, there are several possible conversions which may not be immediately apparent. A garage which is built into or onto a house would lend itself to being a laundry, providing there is sufficient space elsewhere to build a separate garage.
A very large kitchen may become safer, more efficient and better looking if part of it is divided off to make a laundry. Older buildings often have a network of single-storey outbuildings, including redundant fuel stores and sculleries. These are usually suitable for conversion into a laundry, or alternatively you could demolish them and build a new extension in their place.
When planning an extension, remember to leave adequate external access from the front to the back of the house. This should be at least 915mm (3ft) wide to leave enough room for refuse collection. Avoid placing windows which open outwards onto such narrow accesses, as these can cause serious accidents.