We've had decent sized utility rooms with space for a few appliances, butler sink, floor standing (oil-fired) boiler, laundry baskets/drying racks/ironing board and pet stuff (one had the dishwasher too) at previous houses but our current cottage is a downsize property so we've had to compromise a bit here.
When we bought it last year, off the long galley kitchen there was - a square windowless utility, separate loo and lobby area, all dating from when the Georgian property was extended/last renovated in the mid 1960s. Back then you had to have a lobby between the kitchen and toilet, which is no longer the case, so the lobby was wasted space imo.
Having relocated the kitchen, we've reconfigured these four small areas (kitchen, loo, lobby, utility) to make a roomy snug and a lootility that has sufficient space for - toilet, basin, washing machine (possibly with stacked tumble dryer, although we've never bothered with one before), wall-mounted boiler and storage for laundry stuff.
When we convert the integral garage (originally two small Georgian reception rooms) next year, we'll add some built-in storage which will be a kind of 'housekeepers cupboard' with all the crap - brooms, buckets, hoover etc - that won't fit in the lootility.