Is old kitchen removal always extra?

Not always—some installers include it in the quote, but many don't. Always ask specifically whether removal and disposal are included. If not, get a fixed price for both before work starts.

Do I need to hire my own electrician and plumber?

Usually yes, unless the quote explicitly says they're included. Sponge kitchen installers often don't carry the necessary certifications for gas or electrical work. Get separate quotes from licensed tradespeople and make sure their work is coordinated with the installation schedule.

Why did my final bill come in 20% higher than the quote?

The most common reasons are site preparation (plastering, floor leveling), utility connections, old kitchen removal, and appliance fitting. These are often excluded from the base quote. Review your quote for exclusions and ask for a detailed breakdown before signing.

Can I save money by removing the old kitchen myself?

Yes, but only if you're confident you won't damage the walls, floors, or pipework. Any damage will need to be repaired before installation, which could cost more than professional removal. Also, some installers won't work in a space they didn't clear, so check their policy first.

Sponge Kitchen Installation Hidden Costs: What Surprises Buyers and How to Avoid Them

Why Does My Final Sponge Kitchen Bill Exceed the Quote?

Most sponge kitchen quotes cover the cabinets, worktop, and basic fitting—but not the site preparation, utility connections, or old kitchen removal. These extras can add 15–30% to the total, which is why many homeowners are shocked when the final invoice arrives.

The gap usually comes down to what the installer assumes versus what your kitchen actually needs. A quote based on a standard rectangular room with straight walls won't account for uneven floors, plumbing reroutes, or the cost of making good after the old units are pulled out.

Before you sign anything, ask for a written list of exactly what is and isn't included. A reputable sponge kitchen company should provide a detailed breakdown—if they won't, treat that as a warning sign.

Site survey and preparation fees
Old kitchen removal and disposal charges
Electrical, plumbing, and gas connection work
Wall plastering, tiling, and floor leveling
Ventilation or extractor installation
Appliance fitting and integration
Delivery, parking, and waste removal surcharges

Workers measuring a kitchen during installation preparation

What Site Preparation Work Is Usually Not Included?

Sponge kitchen installers typically expect a clean, level, and ready space. If your walls are uneven, your floor slopes, or there's old adhesive or tiles to remove, that's extra. Plastering, screeding, and damp-proofing are almost always charged separately.

A hidden cost many overlook is the electrical and plumbing work. Moving a sink, adding a dishwasher point, or relocating sockets requires a certified tradesperson. These are rarely in the base quote and can cost several hundred pounds depending on your area.

To avoid surprises, get a separate quote from an electrician and plumber before committing. Ask your sponge kitchen supplier if they have preferred contractors—but always compare prices independently.

Work item	Typical extra cost range	Who usually pays
Plastering walls	£200–£600	Homeowner
Floor leveling	£150–£400	Homeowner
Moving a sink or gas pipe	£150–£500	Homeowner
Adding electrical sockets	£100–£300	Homeowner
Old kitchen removal	£100–£300	Homeowner

Plumber connecting pipes under a kitchen sink

How Much Does Removing the Old Kitchen Actually Cost?

Some companies include old kitchen removal in the quote; most don't. If it's not specified, you'll pay extra for taking out cabinets, worktops, and appliances, plus disposing of them. Removal can cost £100–£300, and disposal fees add more if you're using a licensed waste carrier.

You can save money by doing the removal yourself, but be careful—if you damage walls or floors during the strip-out, the installation team will charge you to fix it. Also, some installers won't fit new kitchens into a space they didn't clear themselves, for liability reasons.

Ask upfront: 'Is removal of my old kitchen included?' If not, get a fixed price for removal and disposal in writing before work begins.

Are Ventilation and Extractor Installation Extra?

A sponge kitchen often comes with an extractor hood, but the ducting, external vent, and installation are separate. If you're placing the hob on an internal wall, running ductwork through the ceiling or outside can cost £150–£400, depending on the route.

Recirculating extractors are cheaper to install because they don't need ducting, but they're less effective and require regular filter changes. If your quote assumes a recirculating hood and you wanted a ducted one, that's a hidden cost that only appears at installation.

Decide on the extractor type before quoting. Ask the installer to price both options, and confirm whether the ducting and external vent are included in the final figure.

What Other Hidden Charges Should I Look Out For?

Delivery can be a surprise if you live above ground level or have limited parking. Some companies charge extra for carrying units up stairs, over long distances, or for parking permits. Ask about delivery access and any potential surcharges when you get the quote.

Appliance integration—fitting a dishwasher, oven, or fridge into the new units—is often an add-on. Even if the kitchen price includes 'installation,' it may only cover the units themselves. Check whether your quote lists appliance fitting as a separate line item.

Finally, always add a contingency of 10–15% to your budget for unexpected issues like plumbing leaks, wall repairs, or delivery damage. A written contract with a clear payment schedule also protects you from mid-project price hikes.

Delivery and access charges
Appliance integration fees
Parking permits or congestion charges
Wall repairs after old unit removal
Unexpected plumbing or electrical faults
Skip hire or waste removal
Builder's clean-up services

How Can I Avoid These Hidden Costs Before Signing?

The best way to avoid surprises is to get a detailed, itemized quote that lists every task and material. Ask the installer to visit your home and measure, rather than quoting from photos or floor plans—this helps them spot potential issues like uneven walls or old pipework.

Get at least three quotes from different sponge kitchen installers and compare them line by line. The cheapest quote may be missing crucial items that others include, so look at the total cost of the same scope of work.

Put everything in writing: the price, the scope, the timeline, and the payment schedule. If an installer refuses to itemize or rushes you to sign, walk away. A small upfront saving isn't worth a bill that doubles at the end.