Kitchen Units – Complete Cost, Size & Installation Guide

Choosing kitchen units involves more than picking a style. Base units, wall units, and tall units form the backbone of any fitted kitchen, and their sizes, materials, and costs vary significantly across UK retailers. This guide breaks down the types, standard dimensions, price ranges, and installation options so you can plan your kitchen project with confidence.

In 2025, the typical budget for replacing kitchen cabinets – supply and fitting – falls between £1,500 and £3,500, according to trade cost guides from MyJobQuote and Checkatrade. Larger kitchens or higher-spec finishes can push that figure much higher, while careful shopping and DIY assembly can keep costs closer to the lower end. Understanding what you are buying and how it will be fitted is the first step to staying on budget.

Kitchen cabinets are sold either as flat‑pack units, which require self‑assembly, or as rigid‑built units that arrive ready to install. Howdens, B&Q, IKEA, and independent suppliers each offer their own range of standard and custom sizes. The type of construction, the material used, and the complexity of the installation all affect the final price.

What kitchen units are available and what types should you consider?

Types of Kitchen Units

Base, wall, tall, and corner units explained – what each is used for and typical dimensions.

Cost & Budgeting

Average prices per unit type, factors influencing cost (material, finish, brand), and how to save.

Sizing & Measuring Guide

Standard widths and heights, tips for measuring your space, handling irregularities.

Installation Options

DIY vs professional fitting, assembly types (flat‑pack vs pre‑assembled), required tools.

The most common grouping in UK buying guides separates kitchen units into base, wall, and tall units. Base units sit on the floor and support worktops. Wall units are mounted above the worktop, typically 450–500 mm above it, and are shallower. Tall units run from floor to ceiling and are often used for integrated appliances or larder storage. Howdens also highlights handleless, flat‑pack, and ready‑made units as style and construction options.

Key insights about kitchen units

Buying a full set (base + wall + tall) often reduces per‑unit cost by up to 15 % compared to buying each unit separately.
Pre‑assembled units are generally 20–40 % more expensive than flat‑pack, but save between 2 and 6 hours of assembly time per unit.
Medium‑density fibreboard (MDF) is the most popular material for kitchen units because of its cost, smooth finish, and paintability. Plywood and solid wood offer higher durability but at a higher price.
Standard UK kitchen base units are 600 mm deep and 720 mm high (excluding worktop); wall units are 300–400 mm deep.

Typical dimensions and average costs for kitchen units

Unit Type	Typical Widths	Standard Depth	Standard Height	Average Cost (flat‑pack, per unit)	Average Cost (pre‑assembled, per unit)
Base Unit	300, 400, 500, 600, 800, 900, 1000 mm	600 mm	720 mm	£80–£250	£180–£500+
Wall Unit	300, 400, 500, 600, 800, 900, 1000 mm	300–400 mm	360, 720 mm	£50–£150	£120–£350+
Tall Unit (larder)	400, 500, 600 mm	600 mm	2000–2200 mm	£130–£350	£250–£700+

Standard measurement note

Industry standards such as BS EN 1116 define the nominal widths and depths for kitchen furniture, but actual dimensions may vary slightly between manufacturers. Always check the product specification sheet before ordering.

How much do kitchen units cost and what factors affect the price?

The cost of kitchen units depends on the type, material, finish, and whether you choose flat‑pack or pre‑assembled units. According to Checkatrade, a standard base unit costs £20–£70, while a higher‑quality base unit runs £70–£130. Better Kitchens quotes £40–£90 per base cabinet for budget ranges and £90–£150 for premium units. Wall units follow a similar pattern: £20–£50 for standard, £70–£100 for higher quality.

Where to buy cheap kitchen units

Budget shoppers often turn to flat‑pack ranges from B&Q, IKEA, or online‑only retailers like DIY Kitchens 4 U. Buying a complete set can reduce per‑unit costs, as retailers bundle base, wall, and tall units at a discount. However, the cheapest options tend to use particleboard or MDF with melamine finishes, which may not last as long as solid wood or plywood alternatives. For reclaimed or second‑hand choices, see Furniture Charity Shops Near Me: Donate & Buy Guide.

What adds to the cost?

Construction type: Flat‑pack is cheaper; rigid‑built units cost more because they arrive assembled.
Material: MDF and particleboard are affordable; plywood and solid wood are significantly more expensive.
Finishes and hardware: Soft‑close hinges, rollout trays, and custom joinery all add to the price.
Labour complexity: Awkward layouts, plumbing changes, and electrical work raise fitting costs, as noted by Olive & Barr.
Custom sizes: Made‑to‑order units can cost 20–50 % more than standard sizes and require longer lead times.

Budget planning tip

For a typical 2025–2026 budget, allocate roughly £1,500–£3,000 for cabinet supply alone if you choose mid‑range flat‑pack units. Professional installation adds £1,600–£3,000 for a small kitchen, rising to £3,500–£6,000 for a larger one, according to MyJobQuote. Always request a separate quote for cabinets, delivery, worktops, and electrical/plumbing work.

What sizes do kitchen units come in and how do you measure correctly?

Standard UK kitchen units follow the widths listed in the table above. Cutmy.co.uk provides a detailed guide: base units commonly come in widths of 300 mm, 400 mm, 500 mm, 600 mm, 800 mm, 900 mm, and 1000 mm. Wall units match those widths but are shallower – usually 300 mm deep – and come in heights of 575 mm, 720 mm, or 900 mm. Tall units are typically 300–600 mm wide and 560 mm deep.

How to measure for kitchen units

Before ordering, measure the room carefully: walls, doors, windows, and fixed services such as gas and electric points. Mark out the positions of appliances and plumbing early. Check the floor level and wall straightness – if they are out of true, you may need filler panels or adjustable legs. A UK DIY guide emphasises that accurate measuring is critical, and complex installations may be better left to professionals.

Common measurement mistake

Cabinet doors should be about 4 mm smaller than the opening they cover to allow for clearance. Failure to account for this can result in doors that rub against each other or the frame.

Can you get kitchen units for small spaces?

Yes. Narrow base units (300 mm and 400 mm wide), shallow wall units, and corner carousel units are designed for compact kitchens. Many suppliers also offer bespoke sizes, though custom orders cost more and take longer.

How to install kitchen units – is it a DIY project?

Installing kitchen units yourself is possible if you have the right skills, tools, and patience. A UK DIY guide states that accurate measurement is critical and notes that complex installations – those involving plumbing or electrical relocation – may be better left to professionals. Checkatrade adds that DIY fitting can save the cost of a fitter if you have prior experience.

What tools do I need?

Drill and screwdriver set
Spirit level and tape measure
Clamps and a saw for trimming filler panels
Stud finder for wall fixing
Optional: impact driver, laser level, and door alignment jig

How long does it take?

Fitting a single base unit (including assembly if flat‑pack) takes about 1–2 hours for an experienced person. A full kitchen with 10–12 units typically takes a DIYer 2–4 days; a professional can complete the job in 1–2 days. Pre‑assembled units cut assembly time but still require careful levelling and fixing to walls.

Flat‑pack versus ready‑made

Flat‑pack units are cheaper but demand several hours of assembly per cabinet. Rigid‑built units cost more yet reduce the installation timeline significantly, as noted by MyJobQuote. If you are short on time or lack woodworking experience, pre‑assembled units may be worth the premium.

DIY installation level of difficulty

For beginners, professional fitting is recommended for kitchens with non‑standard layouts, gas fittings nearby, or integrated appliances. The NHBC provides guidance on kitchen installation standards that cover safe clearances around hobs and sinks.

Where can you buy quality kitchen units online and which brands are trusted?

The UK market is dominated by several major retailers and trade suppliers. IKEA offers a wide range of flat‑pack units with strong design and planning tools. B&Q provides consumer‑friendly options with click‑and‑collect and installation services. For a detailed look at one specific location, see B&Q Stockport: Store guide and key policies. Howdens is a trade‑oriented supplier with high‑quality manufacturing, though prices are typically only visible to trade account holders. DIY Kitchens 4 U sells direct to consumers with a focus on value and made‑to‑order units. Independent online stores also offer custom sizes and finishes.

Which brands are most reliable?

Consumer association Which? regularly reviews kitchen brands, and IKEA consistently scores well for value and ease of assembly. Howdens is highly regarded among professionals for build quality. B&Q and Wickes are popular for mid‑range projects. When comparing suppliers, note that some market products as stock, semi‑custom, or custom, with custom options costing significantly more, according to Olive & Barr.

What do trade suppliers offer?

Trade suppliers such as Howdens provide specification downloads, CAD drawings, and professional account management. They often require a trade account, but consumers can sometimes access their services through a builder or kitchen fitter. Lead times for custom units from trade suppliers typically range from 7 to 14 days.

How long does it take to fit kitchen units from start to finish?

Week 1–2: Planning & Measuring – Decide layout, measure space, choose unit types and sizes, set a budget.
Week 2–3: Ordering – Compare suppliers, place order. Flat‑pack takes 1–3 days to arrive; pre‑assembled units require 7–14 days lead time.
Week 3–4 (if DIY): Assembly & Prep – Assemble flat‑pack units (2–3 hours per unit), prepare walls and flooring.
Week 4–5: Installation – Fit base units, then wall units, install doors and drawers, adjust alignment.
Week 5–6: Finishing Touches – Add worktops, handles, trim, and seal. Professional fitting reduces the overall timeline but adds cost.

What is certain and what remains unclear about kitchen unit costs and durability?

Established information	Information that remains unclear
Standard dimensions are defined by BS EN 1116: base units 600 mm deep, 720 mm high; wall units 300–400 mm deep.	Exact per‑unit cost varies widely by retailer, material, finish, and promotional discounts – always request current quotes.
Most kitchen units are made from MDF, particleboard, or plywood; solid wood is significantly more expensive.	DIY installation difficulty depends on the user’s previous experience; beginners may find professional fitting more reliable for complex kitchens.
Flat‑pack units are cheaper but require more time and skill to assemble than pre‑assembled units.	Long‑term durability depends on maintenance, humidity, and usage – manufacturer warranties typically cover 2–10 years but exclude wear and tear.

What is the UK kitchen unit market like in 2025?

The UK kitchen unit market is dominated by a few major retailers – IKEA, B&Q, Wickes, Howdens, and DIY Kitchens 4 U – plus independent trade suppliers. Supply chain issues that affected lead times after 2020 have largely stabilised, though custom units may still require 2–4 weeks for delivery. Sustainability is an increasing concern: buyers are looking for FSC‑certified timber and low‑VOC finishes. Many online retailers now offer free 3D planning tools, though the accuracy of the final design depends on the measurements submitted by the user.

After purchasing units, plan for worktop installation – laminate, solid wood, quartz, or granite. Consider accessories such as soft‑close hinges, pull‑out bins, and plinth lights. If you are renovating, check whether electrical or plumbing changes are needed; those must be carried out by a qualified tradesperson. Some brands now offer take‑back recycling schemes for old units, reflecting a shift toward circular economy practices.

Which sources and standards provide reliable information on kitchen units?

The following sources are widely consulted when planning a kitchen unit purchase or installation:

Which? – Kitchen Buying Guide: Consumer association with independent reviews and cost advice. Which? Kitchen Buying Guide
BS EN 1116 Kitchen Furniture Standards: Defines nominal dimensions for kitchen units in Europe. BS EN 1116: Kitchen Furniture Specifications
NHBC Guidelines for Kitchen Installation: Trade guidance on safe installation practices. NHBC Kitchen Installation Standards
FSC (Forest Stewardship Council) certification: Indicates responsibly sourced wood. FSC Certified Wood Information
Manufacturer datasheets from IKEA, Howdens, B&Q, and DIY Kitchens 4 U provide product‑specific specifications.

What should you keep in mind when buying kitchen units?

Buying kitchen units involves balancing cost, quality, size, and installation effort. Flat‑pack units are the most budget‑friendly but demand time and skill. Pre‑assembled units cost more but save days of work. Measure your space meticulously, verify dimensions against appliances and worktops, and ask for itemised quotes that separate cabinet cost, delivery, worktops, fitting, and any electrical or plumbing work. For a smooth project, consider visiting a local retailer such as B&Q Stockport to see units in person, or browse furniture charity shops for second‑hand pieces that can be refurbished.

Frequently asked questions about kitchen units

Are kitchen units easy to fit yourself?

It depends on your skill level. Flat‑pack units require assembly and fitting; pre‑assembled units save assembly but still need levelling and fixing to walls. Many DIYers tackle it with the right tools and patience. Beginners should expect 2–3 days for an average kitchen.

What tools do I need to install kitchen units?

Basic tools: drill, spirit level, tape measure, screwdrivers, clamps, saw (for trimming filler panels), and a stud finder. Optional: impact driver, laser level, and jig for door alignment.

How long does it take to fit a kitchen unit?

Fitting a single base unit (including assembly if flat‑pack) takes about 1–2 hours for an experienced person. A full kitchen (10–12 units) can take 2–4 days for a DIYer, 1–2 days for a professional.

What is the difference between base and wall units?

Base units sit on the floor, support worktops, and are typically 600 mm deep and 720 mm tall. Wall units are mounted on the wall above the worktop, shallower (300–400 mm deep), and used for storage.

Can I get custom‑sized kitchen units?

Many suppliers offer made‑to‑order units in non‑standard sizes. This typically costs 20–50 % more than standard sizes and has longer lead times (2–4 weeks). Brands like DIY Kitchens 4 U and Howdens are known for custom sizes.

What are kitchen units made of?

Most kitchen units are made from MDF, particleboard, or plywood. Solid wood is available but significantly more expensive. Finishes include melamine, veneer, lacquer, and paint grade surfaces.

How durable are kitchen units?

Durability depends on the material and maintenance. MDF and particleboard can last 10–15 years with care; plywood and solid wood can last 20 years or more. Manufacturer warranties typically cover 2–10 years but exclude wear and tear.

What is the best finish for kitchen cabinets?

Melamine and laminate are easy to clean and budget‑friendly. Painted MDF offers a smooth, modern look but may chip. Wood veneer and solid wood provide natural beauty but require more maintenance to avoid moisture damage.

Do I need to hire an electrician or plumber for kitchen unit installation?

If you are moving gas, water, or electrical points, you must use a qualified tradesperson. Simply fitting cabinets that connect to existing services does not always require professional help, but local building regulations may apply – check with your local authority or the NHBC guidelines.

How do I plan a kitchen layout with base and wall units?

Start by marking the positions of sink, hob, and appliances. Use standard unit sizes to create a run of base units, then place wall units above. IKEA and other retailers offer free online planning tools – but always verify measurements with a physical tape measure.