How much does it cost to renovate a kitchen or bathroom in NZ?

Kitchens and bathrooms are the most expensive rooms because of plumbing, electrical, waterproofing and cabinetry. A standard kitchen often starts around $25,000 and a bathroom around $20,000, with budget jobs less and premium fit-outs considerably more.

What does the quality level change?

The quality level scales the base cost: a budget renovation uses stock fittings and finishes and costs less, while a premium one uses custom joinery, stone and designer fixtures and costs much more in the same room. The multiplier reflects that range.

Why include a contingency for renovations?

Opening up walls, floors and ceilings often reveals rot, old wiring, leaks or non-compliant work that must be fixed. A contingency of around 10 to 20 percent protects your budget from these surprises, which are very common in older New Zealand homes.

Renovation Cost Per Room Calculator

This calculator gives you a realistic budget to renovate a single room in New Zealand, which is how most home renovations are actually planned and paid for, one room at a time. Renovation costs vary enormously by room and by how far you take it, and the two rooms that dominate spending are the kitchen and the bathroom, because they involve plumbing, electrical work, waterproofing, cabinetry and appliances or fixtures, all of which add up quickly. A bedroom or living room is usually far cheaper, often just flooring, paint, lighting and maybe a built-in wardrobe. The other big driver is the quality level: a budget refresh using stock cabinetry and entry-level fittings can cost a fraction of a premium renovation with custom joinery, stone benchtops and designer tapware in the very same room. This tool starts from a typical base cost for the room you choose, then applies a quality multiplier and a contingency, because renovations almost always uncover something behind the walls. You select the room, choose budget, standard or premium quality, and set a contingency, and the calculator returns the estimated cost, the base figure, the quality adjustment and the contingency. Use it to set a per-room budget, to plan a staged renovation across several years, or to sanity-check a builder's or designer's quote before you commit. Renovation pricing is highly site-specific and regional, and structural changes, consents or moving services push costs well beyond a standard fit-out, so treat this as a planning estimate and get detailed quotes for the work you intend to do.

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Room

Quality level

Contingency

$23,000

estimated renovation cost

Base (standard)$20,000

After quality$20,000

Contingency$3,000

Quality1.0x

Indicative base costs for a typical fit-out. Structural work, consents and moving services add a lot. An estimate; get detailed quotes.

How it works

Each room has a typical base cost for a standard fit-out. That base is multiplied by the quality level, which scales it down for a budget job or up for a premium one. A contingency is then applied, because renovations frequently uncover hidden issues once walls and floors are opened up.

Worked example

A standard bathroom renovation has a base of about $20,000. At standard quality the multiplier is 1.0, leaving $20,000, and a 15 percent contingency of $3,000 brings the total to about $23,000. Choosing premium quality at 1.6 times would lift the base to $32,000 before contingency, while a budget job at 0.7 would bring it to $14,000.

Related calculators

Renovation Budget: whole-project budget.
Deck or Fence Cost: outdoor projects.
Skirting & Architrave: trim quantities.
Mortgage Top-Up: funding a renovation.

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