Custom kitchen cabinets are usually measured and built once. If the measurements are wrong, you’re either rebuilding cabinets or making compromises during installation that the client notices every time they use their kitchen.

I’ve been called in to fix enough problematic kitchen installations to recognize the measuring mistakes that cause the biggest problems.

Not Accounting for Out-of-Square Walls

Most rooms aren’t perfectly square. Walls built decades ago weren’t plumb. Floors have settled. The corner where you’re installing base cabinets might be 89 degrees instead of 90, and the opposite corner might be 91 degrees.

If you template the kitchen assuming perfect 90-degree corners, your cabinets won’t fit the space properly. You’ll have gaps, cabinets that don’t sit flush against walls, or corner units that bind.

The proper approach is to measure the actual angles at each corner, measure wall lengths in multiple places (they’re rarely perfectly straight), and build a bit of adjustability into the cabinet design.

I’ve seen cabinetmakers build perfect cabinets for a kitchen based on architectural plans showing 90-degree corners. Then during installation, they discover the actual room is 30mm narrower at one end than the other, and the corners are 2-3 degrees off square.

Those cabinets either get rebuilt, heavily modified on-site, or installed with visible gaps that get filled with scribing strips and filler panels.

Ignoring Floor Level

Floors are rarely level, especially in older houses. A floor might slope 20mm across a 4-metre run. If you measure at one height and assume the floor is level, your cabinets won’t align properly.

Base cabinets need to be installed level, which means they’ll sit at different heights along an unlevel floor. If your benchtop is templated assuming the cabinets will sit at a consistent height, the template will be wrong.

The fix is to establish a level line during templating - find the highest point of the floor where cabinets will sit, mark a level line from there, and template everything relative to that line.

Then during installation, the cabinets are packed or trimmed to sit level, and the final benchtop templating accounts for the actual installed cabinet heights.

Skipping this step is how you end up with benchtops that don’t fit, gaps between benchtop and wall, or cabinets that look visibly out of level.

Underestimating Wall Irregularities

Even newly built walls are rarely perfectly flat. There are studs, drywall inconsistencies, previous patch jobs. A wall might bow out 10mm in the middle or have a 5mm hump where pipes were covered.

If you measure wall cabinet depth assuming a flat wall, the cabinets might not sit flush. Either the cabinet hits the wall irregularity and hangs proud, or there’s a gap between cabinet back and wall.

Quality kitchen installers scribe cabinets to fit the wall - they slightly undercut the cabinet back or add scribing strips that can be trimmed to match wall irregularities.

But this only works if you’ve measured the walls properly during templating and designed the cabinets with enough allowance for scribing.

I’ve worked with specialists in this space who are applying 3D scanning to kitchen templating, capturing actual room geometry including wall irregularities. It’s reducing measuring errors significantly, but most workshops are still using tape measures and assuming walls are flatter than they actually are.

Missing Services and Obstacles

Water pipes, electrical outlets, drainage, gas lines - there’s a lot behind kitchen walls, under floors, and in ceilings. If you don’t identify and measure the exact locations during templating, you’re cutting holes and notches during installation when it’s much harder to do accurately.

The most common mistake is measuring outlet positions from floor to center of outlet, but not accounting for how high the base cabinets actually sit. The outlet might be 300mm from floor, the base cabinet is 720mm high with benchtop, and during installation you realize the outlet is now hidden behind the benchtop.

Proper templating identifies every service location, measures it in three dimensions, and checks clearances against the actual cabinet and benchtop design.

Not Confirming Appliance Dimensions

Appliances come in standard sizes, mostly. Until they don’t. A 600mm dishwasher might actually be 598mm or 605mm. A fridge that’s supposed to be 900mm wide might be 905mm with handles.

If you build a 600mm cabinet space for a 605mm dishwasher, it doesn’t fit. If you leave exactly 900mm for a fridge and the handles overhang, the cabinets either side need to be modified or the handles interfere with doors.

The solution is to confirm actual appliance dimensions before finalizing cabinet sizes - either by measuring the actual appliances if available, or checking manufacturer specs for the specific model, not just assuming standard sizes.

I’ve seen full kitchen installations delayed because the rangehood was 20mm wider than assumed and the cabinets either side needed rebuilding.

The Template-to-Shop-Drawing Gap

Even when site templating is done properly, errors creep in during translation to shop drawings. A dimension gets transposed, a note gets missed, a wall angle doesn’t get transferred correctly.

This is why quality cabinet shops have a process where the person who did the site template reviews the shop drawings before fabrication starts. They check that what was measured matches what’s being built.

Shops that skip this review step - where the templater hands off measurements and never sees the drawings again - have higher rates of installation problems.

What Clients Can Do

If you’re having a custom kitchen made, ask your cabinetmaker about their templating process:

• Do they template the actual site before finalizing designs, or work from architectural plans?
• Do they check for square, level, and plumb?
• Do they identify service locations?
• Do they confirm appliance dimensions?
• Who reviews the shop drawings against the site template?

A good cabinetmaker will have clear answers to all of these. A cabinetmaker who waves them off or says they’ll “sort it out during installation” is someone who’s going to have problems.

The templating visit might take 2-3 hours for a kitchen. That time investment prevents installation problems that can take days to rectify and cost thousands in rework.

The Bottom Line

Most kitchen installation problems aren’t actually installation problems - they’re measuring problems that don’t become apparent until installation.

Proper site templating, accounting for real-world conditions rather than ideal geometry, is what separates smooth installations from painful ones.

The extra time spent measuring properly is invisible to the client. The problems caused by rushed or inaccurate measuring are very visible and very expensive to fix.

From a cabinet maker’s perspective, templating is the most important site visit. Get the measurements right, and installation is straightforward. Get them wrong, and you’re problem-solving on-site with expensive materials and an impatient client.