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Kitchen Renovation Cost: Where the Money Actually Goes

Two kitchens with identical layouts can differ by a factor of four. Three decisions explain most of it.

By The CalcBold Kitchen Desk7 min readUpdated 1,084 words
Title card reading Kitchen Renovation Cost with the subtitle where the money actually goes
The headline figures range so widely because they are averaging three different projects.

Published kitchen renovation figures are close to useless on their own, because they average together three very different projects: a door-and-worktop refresh, a like-for-like replacement, and a full strip-out with a new layout. Those differ by a factor of four for the same room.

What is stable across all of them is the shape of the budget, and that is what makes planning possible.

Chart of kitchen renovation budget split by category
Cabinetry and labour together are usually more than half the budget, before a single appliance.

Cabinetry is a third of it

Before appliances, worktops or labour are priced, cabinetry has usually taken around a third of the budget. That is why it is also the largest available saving.

The distinction that matters is carcasses versus doors. The carcass is the box; the door is what you see. If the carcasses are sound — no water damage, no sagging shelves, no broken hinge plates — replacing only the doors, handles and worktop transforms a kitchen visually for a fraction of a full replacement.

Comparison of a cosmetic refresh against a full renovation
A refresh keeps the carcasses and the layout. That is where the factor-of-four difference comes from.

The three decisions that move the total

Diagram of the three decisions that most affect kitchen renovation cost
Moving the sink is the single most expensive decision available in a kitchen plan.

Moving plumbing and electrics is the biggest multiplier available. Relocating a sink means new supply and waste runs, often floor work, and in most jurisdictions notifiable electrical work with sign-off. A layout that keeps the sink, hob and drainage where they are can save a very large fraction of the total.

Worktop material is the second. The same run of counter spans an enormous range depending only on what it is cut from.

Table of worktop materials with relative cost and practical trade-offs
Worktop is the line where taste and budget collide most directly, and the range is enormous.

Doors versus carcasses is the third, and the one most people never consider before getting quotes.

Where to save, and where not to

Checklist of where to save money and where not to in a kitchen renovation
Save on what is visible and replaceable. Do not save on what is buried behind cabinetry.

The rule that holds up: save on what is visible and replaceable, not on what is buried and permanent.

Doors can be changed again in five years. Electrics behind a plastered wall cannot. Cheap drawer runners fail within two years and replacing them means taking the drawer front off; good ones outlast the kitchen. Extraction is worth doing properly because a bad extractor is the difference between a kitchen that smells of last night and one that does not.

The costs that are not on the quote

  • Waste disposal. A kitchen strip-out fills a skip, and skip hire is rarely in a fitter's quote.
  • A temporary kitchen. A microwave, a kettle and a table somewhere else, for six to twelve weeks.
  • Eating out. Weeks without a kitchen costs real money, and it is the line people forget entirely.
  • Contingency of 10 to 20 percent. Something is always found behind the old units — usually damp, old wiring, or a floor that is not level.

The cheapest changes that make the most difference

If the budget is small, three things move the needle disproportionately: handles, which take an afternoon and change the whole character of a run of doors; lighting, particularly under-cabinet strips, which change how the room feels at night more than any surface does; and decluttering the worktop, which is free.

That last point is worth taking seriously. A great many kitchens that feel too small are not short of space; they are short of *reachable* space. How to organise kitchen cabinets and small kitchen storage ideas both cover changes that cost under fifty pounds and occasionally remove the reason for renovating at all.

The short version

  • Cabinetry is about a third of the budget; labour is 20-35%.
  • Moving plumbing and electrics is the single biggest multiplier.
  • If the carcasses are dry and square, replace doors instead.
  • Save on doors, worktop material and appliances. Not on electrics, extraction or runners.
  • Add 10-20% contingency and budget for eating out.
  • Handles, lighting and better storage access transform a kitchen for very little.

Common questions

What percentage of a kitchen renovation is cabinets?
Typically around 30 to 35 percent of the total, before appliances, worktops or labour. That makes cabinetry both the largest line and the largest available saving — which is why replacing doors rather than carcasses is the single most effective way to cut a quote.
Is it cheaper to reface kitchen cabinets than replace them?
Considerably, and often it is 25 to 40 percent of a full renovation. It only works if the carcasses are sound: check under the sink for swollen chipboard, soft bottom panels or dark staining. If they are dry and square, new doors and a new worktop transform the kitchen.
What makes a kitchen renovation more expensive?
Moving plumbing and electrics is the biggest multiplier, because relocating a sink or hob pulls in multiple trades, often floor work, and notifiable electrical sign-off. After that it is the worktop material and whether the cabinet carcasses are replaced.
Where should you not save money in a kitchen renovation?
Electrics and plumbing, extraction over the hob, and drawer runners and hinges. All three are either buried behind finished surfaces or replaced only by dismantling something. Doors, worktop material and appliances are all easier to upgrade later.
What hidden costs come up in a kitchen renovation?
Waste disposal and skip hire, setting up a temporary kitchen elsewhere, and eating out for six to twelve weeks. Add a contingency of 10 to 20 percent, because something is almost always found behind the old units — damp, old wiring, or an uneven floor.
What are the cheapest changes that improve a kitchen most?
New handles, under-cabinet lighting, and clearing the worktop. Beyond that, pull-out inserts in deep base cabinets often solve the problem people are actually renovating for — many kitchens that feel too small are short of reachable space rather than of space.

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