Kitchen Electrics and Plumbing: Budgets, Quotes and UK Rules

Reviewed 18 September 2026. Plumbing and electrical costs depend on the tasks, existing installation and access. “Keep the same layout” is not the same as “no trade work”. Appliances may need disconnection and reconnection, new equipment may have different requirements, and the completed work may need testing and documentation.

Our kitchen calculator therefore treats its minor, moderate and major services choices as provisional budgets, not verified task tariffs. The figures below describe the model only. They should be replaced by scoped gross quotations, particularly for major work. They are not a cap on what an electrician or plumber might charge.

What the model’s services choices mean

A single band cannot specify how many sockets, how long a cable run or how difficult the waste route will be. That is why a contractor should provide the task list behind the quotation. If a wider installation package already includes those tasks, do not add the services allowance again.

Read older averages cautiously

Checkatrade’s new-kitchen guide includes illustrative plumbing and electrical components of £300 and £500 in its March 2025 table. Those amounts are useful historical reference points, but the table does not establish the scope of your room or a representative 2026 average.

Our former fixed task ranges could not reliably distinguish labour, materials, connection, testing and making good. Rather than replace them with invented precise prices, we recommend a written schedule. A quote for adding a socket to a suitable existing circuit cannot safely be treated as the price of creating a new circuit.

Build an electrical schedule

List each appliance and its manufacturer’s electrical requirements before asking for a quote. Record which sockets, switches and lights remain, which move and which are new. Identify extractor requirements, proposed under-cabinet lighting and any island equipment. The electrician should assess the existing installation and design the appropriate work.

Do not assume that every oven or hob uses the same circuit rating. Equipment specifications and the installation design matter. Ask the electrician whether the existing consumer unit is suitable and whether additional protective equipment, testing or remedial work is required. Those conclusions cannot be made by a cost calculator.

A dated VAT example, not a universal consumer-unit price

Checkatrade’s consumer-unit replacement guide includes a June 2026 table with amounts expressly stated before VAT. The audit identified £485 net for its specified components, equivalent to £582 gross at the standard rate. If its separately listed £210 net inspection is additionally needed, the combined £695 net becomes £834 gross.

That is conditional arithmetic: £485 × 1.20 = £582, and (£485 + £210) × 1.20 = £834. It does not mean every consumer-unit job needs that separate inspection or that every contractor offers the same scope. Confirm inclusions before adding any inspection charge, and never add VAT twice.

England: what Part P actually says

GOV.UK’s Approved Document P is the authoritative published starting point for England. New circuits and consumer-unit replacements are examples of notifiable work. Specified work in special locations is also relevant, but a kitchen is not automatically a special location merely because it contains a sink.

The earlier claim that almost any work within reach of a kitchen sink is notifiable across England and Wales was too broad. Ask a competent electrician about the actual work and its notification route. A registered competent-person route and a building-control route are not interchangeable promises of what any kitchen fitter can certify.

Notification and electrical testing paperwork are related but distinct. Ask what certificate or report is appropriate for the work and whether building-regulations notification is required. Not every minor alteration produces the same document as a new installation. Keep the records rather than assuming a verbal statement of compliance is enough.

Wales, Scotland and Northern Ireland

Wales has different notification provisions, including rules relevant to kitchen work. Refer to the Welsh Government’s building-regulations guidance and confirm the proposed scope with the installer or local building control. Do not automatically apply England’s current notification categories.

Scotland and Northern Ireland have their own building standards and control arrangements. A general UK pricing article cannot establish every approval requirement for an individual property. State the location when requesting quotations, especially where work affects structure, ventilation, drainage or other regulated aspects of the building.

Plumbing and drainage need more than a distance

Moving a sink involves the water supply, waste route, appliance connections and access to existing services. A short move on a drawing may still require floor access or difficult making good. Ask how the proposed route will work and who is responsible for restoring the disturbed finishes.

Record whether the quotation supplies a sink and tap or only connects products supplied by you. Our sundries allowance already covers ordinary sink/tap supply, so a supply-and-connect package may overlap that line. The same principle applies to specialist taps: a boiling-water system is not automatically included in an ordinary tap allowance.

Gas and appliance connections

Gas work should be undertaken by an appropriately qualified Gas Safe registered engineer. Confirm that the engineer’s competence covers the appliance and work in question. Do not treat a general DIY selection or cabinet-fitting quote as authority to undertake gas alterations.

Keeping an existing appliance removes its new purchase cost, not necessarily its connection, testing or disposal costs. Check whether the delivery company, fitter or separate trade handles each step. A range cooker may replace separate oven and hob purchases, but its connection requirements must still be assessed.

Making good and avoiding overlaps

Ask whether chasing, patching, lifting floors and reinstatement are included. Our removal option contains a provisional local-repair allowance, while whole-room decoration and additional preparation remain separate. If the services contractor prices making good, ensure the same work is not also funded in another line.

Split the quote into identifiable tasks even if the contractor provides one final total. Record which existing assumptions are being replaced. Our fitting guide explains why “full installation” should not be used as a shorthand for every possible trade and finish.

Turn uncertainty into a usable budget

Obtain a survey and comparable itemised quotes before committing to a layout that moves services. Confirm the tax basis using GOV.UK’s VAT guidance; calculator inputs are gross and receive no further VAT uplift.

Keep known work separate from contingency. The model can display a 10% or 15% reserve, but that does not price an uninspected defect or guarantee regulatory approval. Use the pricing methodology and new-kitchen guide to reconcile services with the rest of the project, then replace allowances as reliable quotations arrive.