The easier way to book quality trades

Download app

Adding an ensuite can make your home feel more practical, more comfortable and, in many cases, more attractive to future buyers. But how much should you budget for the project? The cost of adding an ensuite bathroom depends on several factors, including the size of the room, the type of ensuite you choose, how much plumbing and electrical work is needed, and whether any structural alterations are required. In this guide, we'll break down the average cost of adding an ensuite bathroom, explain what affects the price and help you understand where your money is likely to be spent.

How much does it cost to add an ensuite bathroom?

The average cost of adding an ensuite bathroom to an existing bedroom is around £7,000.

However, costs can range from £4,000 to £10,000 depending on the size of the space, the type of ensuite you choose and how much plumbing, electrical or structural work is needed.

Many people assume most of the budget goes on the toilet, basin and shower. In reality, a large proportion of the cost often comes from the work needed behind the scenes.

Running new pipework, creating drainage, building partition walls and installing ventilation all add to the project cost before a single tile is laid.

Get a quote for adding an ensuite bathroom

Adding an ensuite typically involves several different trades, including bathroom fitters, plumbers, electricians, plasterers and tilers. Because every home is different, getting a couple of detailed quotes is the best way to understand the likely cost of your project. Find checked bathroom fitters working in your area and request quotes with ease.

Ensuite bathroom costs at a glance

As a quick overview, here's what most homeowners can expect to pay when adding an ensuite bathroom:

• Adding an ensuite to an existing bedroom: £4,000–£10,000

• Small ensuite (toilet and basin): £2,500–£6,000

• Ensuite with shower: £4,000–£10,000

• Ensuite wet room: £5,000–£10,000

• Bathroom fitter day rate: £320–£480 per day

Most people spend the bulk of their budget on plumbing, fitting and creating the new room itself rather than the actual bathroom suite.

Cost of adding an ensuite bathroom by project type

The type of ensuite you choose will have a big impact on your overall budget. These are some of the most common options.

Cost of adding an ensuite to an existing bedroom

Most homeowners create an ensuite by dividing part of an existing bedroom with a new partition wall. The larger the bedroom to begin with, the easier this tends to be.

Most homeowners can expect to pay between £4,000 and £10,000, with an average cost of around £7,000.

This usually involves creating a new room layout, installing plumbing and drainage, carrying out electrical work and fitting the bathroom suite.

Small ensuite costs

If space is limited, a compact ensuite with just a toilet and basin can be a cost-effective solution.

A small ensuite won't give you luxury hotel levels of space, but it can still be a practical addition and significantly cheaper than creating a full shower room.

Small ensuite costs typically range from £2,500 to £6,000, with an average cost of around £4,250.

Cost of installing an ensuite with a shower

An ensuite with a toilet, basin and shower remains one of the most popular options because it offers day-to-day convenience without taking up as much space as a family bathroom.

Most projects cost somewhere between £4,000 and £10,000, with an average cost of around £7,000.

The final price will depend on the shower type, tiling specification and the complexity of the plumbing installation.

Cost of ensuite wet room

A wet room ensuite can create a contemporary, accessible and easy-to-clean bathroom space.

Wet rooms can look fantastic, but the additional waterproofing and drainage requirements are usually reflected in the price.

Most ensuite wet rooms cost between £5,000 and £10,000, with an average cost of around £7,500.

What affects the cost of adding an ensuite?

One homeowner might be able to create an ensuite by borrowing a corner of a large bedroom that's already close to existing pipework. Another might need new walls, longer plumbing runs and extensive electrical work.

That's why one person might receive a quote for £4,000 while another is looking at something much closer to £10,000.

The main factors that affect the cost of this project include:

• Size of the ensuite

• Distance from existing plumbing and drainage

• Type and quality of fixtures and fittings

• Amount of tiling required

• Ventilation requirements

• Electrical work needed

• Flooring choices

• Structural alterations

• Your location within the UK

Generally speaking, the closer your new ensuite is to existing plumbing and drainage connections, the more cost-effective the installation is likely to be.

On Checkatrade, you'll only find trades who meet our high standards and pass up to 12 checks.

Additional costs to budget for

When pricing up an ensuite, you might focus on the shower, toilet and basin. But creating the room itself is where many of the extra costs appear.

Depending on the layout of your home, these are some of the extras you may need to budget for and approximate costs:

• New partition walls and plastering (£800–£2,000)

• Plumbing works (£1,000–£3,000)

• Electrical works (£500–£1,500)

• Ventilation installation (£250–£500)

• Fixtures and fittings (£300–£3,000)

• Tiling (around £1,000)

• New flooring (£800–£1,600)

• Structural alterations (£1,000+)

What's included in a quote?

A quote for adding an ensuite bathroom will vary from project to project, but it will often include:

• Site survey and planning

• Bathroom fitting labour

• Plumbing installation

• Electrical work

• Ventilation installation

• Installation of sanitaryware

• Waterproofing where required

• Testing and commissioning

Potential exclusions may include:

• Structural alterations

• Decorating

• Building Control fees (where applicable)

• Flooring upgrades beyond the agreed specification

Always ask for an itemised quote so you can compare like-for-like when reviewing prices.

How long does it take to add an ensuite bathroom?

Most ensuite installations take between 1–3 weeks to complete. A straightforward small ensuite may be completed more quickly, while larger projects involving structural alterations, drainage work or wet room construction can take longer.

Ensuite bathroom cost calculator

Our cost calculator can help provide an idea of how much it might cost to add an ensuite to your home before requesting quotes.

Job Estimate Calculator

Get Started

Step 0/3

This calculator provides a guide price only, not a quote. For an accurate cost, ask several checked bathroom fitters to assess the space, listen to your requirements and provide an itemised written quote.

Can you add an ensuite to any room?

Many homeowners start by looking at the largest bedroom in the house, but size isn't the only consideration. Access to drainage and existing pipework can be just as important.

In practice, the easiest projects are usually those with enough spare floor space and relatively easy access to existing plumbing and drainage.

That's why it's common for homeowners to discover that two similar-looking bedrooms can have very different installation costs.

A bathroom fitter or plumber can assess your chosen room and explain what work would be needed to make the project viable.

We check the reviews on Checkatrade are from real people, and that trades meet our high standards.

Tips for keeping ensuite costs down

One thing that often becomes clear after receiving the first quote is that moving pipework around a house can quickly become expensive.

If you're trying to keep costs under control, these approaches can help:

• Position the ensuite close to existing plumbing where possible

• Keep the layout simple

• Choose standard-sized fixtures and fittings

• Limit structural alterations

• Compare multiple itemised quotes

• Reuse existing services where practical

Small design decisions can often make a big difference to the final cost.

Ensuite bathroom installation checklist

• Confirm the available space

• Check drainage and plumbing routes

• Decide on the type of ensuite you want

• Set a realistic budget

• Compare several itemised quotes

• Check reviews and previous work

• Confirm what's included in the quote

• Discuss ventilation requirements

• Clarify project timescales

• Understand any structural implications

When should you speak to a bathroom fitter about your ensuite plans?

If you're at the stage where you're sketching layouts on paper or measuring up corners of a bedroom, it's probably worth having a conversation with an experienced bathroom fitter.

A quick site visit can often answer questions that are difficult to iron out from floor plans alone, particularly around drainage, pipework and whether the available space will work comfortably in practice.

Getting advice early can also help you avoid designing a layout that later proves expensive or impractical to build.

Every Checkatrade job is backed by our £1,000 guarantee

Up to £1000. Eligibility criteria and T&C’s apply.

Find a bathroom fitter for your ensuite installation

Adding an ensuite bathroom is a significant investment, so it's important to choose the right tradespeople. Compare quotes from checked bathroom fitters and find a professional who can help bring your plans to life.

FAQs

How much does it cost to build a small ensuite?

A small ensuite containing a toilet and basin typically costs between £2,500 and £6,000.

How much does it cost to put an ensuite in a bedroom?

Adding an ensuite to an existing bedroom usually costs somewhere between £4,000 and £10,000, with many homeowners spending around £7,000, depending on the size, scope and complexity of the project.

Can an ensuite just be a toilet and sink?

Some small ensuite bathrooms contain just a toilet and basin, making them a good option where space is limited. These projects are often less expensive than ensuites that include a shower or wet room.

Can you put an ensuite in any room?

Potentially, yes. The suitability of the room will depend on factors such as available space, access to plumbing and drainage, ventilation requirements and the overall layout of your property.

How much does an ensuite wet room cost?

Most ensuite wet rooms cost between £5,000 and £10,000, with an average cost of around £7,500.

Checkatrade

Follow us

Cost to add an ensuite bathroom: Key takeaways

• Adding an ensuite bathroom typically costs £4,000–£10,000

• The average cost of adding an ensuite to an existing bedroom is around £7,000

• Small ensuites average around £4,250

• Ensuite wet rooms average around £7,500

• Plumbing, electrics, ventilation and structural alterations can all affect the final cost

• Most projects take between 1–3 weeks to complete