Measure more than a rectangle
Measure the opening at several heights. A skirting board or uneven wall can take space that is not obvious at eye level. Record the narrowest width and check that the floor is level. Measure height to the underside of any worktop, including strengthening pieces projecting beneath it.
Next establish what the manufacturer's depth figure includes. The cabinet, door and connections can produce different dimensions. Compare an installation drawing with the actual space. A machine that fits precisely between cupboards may still have to stand further forward to prevent hoses being crushed behind it. Allowances should come from the model's instructions rather than a guessed universal gap.
Keep connections accessible
Locate the water valve, drain and electrical socket. Hoses need to follow the installation instructions without sharp bends or excessive tension. Do not assume that extending every connection will make an unsuitable location acceptable. Check the permitted hose arrangements and lengths, and seek appropriate help if the fixed installation is uncertain.
Consider maintenance access too. A low filter flap can disappear behind a tall plinth. A water valve that becomes reachable only after pulling a heavy machine from a tight recess is an awkward starting point. Examine the layout with both the door and detergent drawer open, rather than judging it only when everything is closed.
A measurement record for installation
Photograph the empty space and put measurements on a separate sketch. Record the water valve's position relative to the floor and side wall, then do the same for the drain and socket. A photograph without dimensions can mislead through perspective; a sketch without a photograph may omit a projecting edge. Together they give a supplier or installer more useful information.
Distinguish fixed obstacles from movable ones. A loose laundry basket can go elsewhere. A permanent pipe, structural wall or fitted cabinet presents a different constraint. Do not plan to solve a poor fit by removing parts of the machine without approval. Some appliances can stand beneath a worktop, but only under their own installation conditions.
If the old machine remains in place, do not assume a replacement with the same nominal width also fits. Connections may project differently and the door may have a different height or swing. Find the complete drawing of the new version, including controls and maintenance flaps.
Before delivery, ask what preparation is required and who checks the connections. That keeps the delivery scope clear. Save the exact model identifier with the measurements; changing to a nearly identical version calls for another check of the relevant dimensions.
Follow the delivery route
Measure the route before ordering. Tight turns, stairs, lift doors and raised thresholds may be harder to negotiate than the final position. Ask how the delivery service handles packaging, unpacking and an upstairs installation. Do not assume a doorstep-delivery promise includes carrying and positioning the appliance inside your home.
Draw the machine, its door swing and the place where your laundry basket will sit. You need room to stand or sit in front of the drum without completely obstructing the passage. Keep that sketch and check the final model identifier before purchase. Two similarly named versions can have different external dimensions. Comparing the installation drawing now can prevent a delivery that cannot be used where intended.
