How Much Does It Cost to Renovate a House in the UK?

If you’re thinking about transforming your existing property rather than moving, one of the first questions you’re likely to ask is:

“How much does it cost to renovate a house?”

Unfortunately, there isn’t a single figure that applies to every property. Renovating a tired three-bedroom house is very different from completely remodelling a large period property, and choices around kitchens, bathrooms, finishes, structural alterations and extensions can dramatically affect the final investment.

At Garnet Construction, we work with homeowners across Hertfordshire, Essex and North London, helping them transform existing properties into homes that better suit the way they live.

In this guide, we’ll look at what influences the cost of a home renovation, where your budget is likely to be spent and, importantly, how to plan your project without being caught out by unexpected costs.

What Does a Full House Renovation Include?

The term “house renovation” can mean very different things.

For one homeowner, it might involve redecorating, replacing flooring and installing a new kitchen. For another, it could mean taking a property back to its shell and effectively creating a new home within the existing structure.

A comprehensive renovation might include:

• Removing or altering internal walls
• Structural steelwork
• New electrical installations
• Plumbing upgrades
• New heating systems
• Insulation improvements
• Replacement windows and doors
• Plastering
• New flooring
• Kitchen installation
• Bathroom renovations
• Bespoke carpentry and storage
• Decorating
• External improvements
• Extensions or loft conversions

The scope of the work is therefore one of the biggest factors affecting your overall renovation budget.

How Much Should You Budget for a House Renovation?

It’s tempting to search online for a simple “cost per square metre”, but renovation projects are rarely that straightforward.

Two houses of exactly the same size can require completely different budgets.

A relatively modern property needing cosmetic improvements could be considerably less expensive to renovate than an older property requiring structural repairs, rewiring, new plumbing and extensive insulation work.

Your final cost will depend on factors such as:

The condition of the property

A well-maintained house provides a very different starting point from a property that hasn’t been updated for several decades.

The size of your home

Larger properties naturally require more materials and labour, although size alone doesn’t determine the cost.

Structural alterations

Removing load-bearing walls, installing steel beams or substantially changing the layout adds complexity.

Your specification

There can be an enormous difference between the cost of entry-level and premium kitchens, bathrooms, flooring, glazing and finishes.

Your location

Labour, materials and professional fees can vary considerably across the UK, particularly in London and the South East.

Access to the property

Restricted access, limited parking and difficult material deliveries can all affect construction costs.

For these reasons, we recommend treating online renovation figures as initial budgeting guidance rather than quotations.

Where Does Your Renovation Budget Go?

Understanding where your money is being spent can make budgeting much easier.

Structural Work

If you’re substantially changing the layout of your home, structural work may form a significant part of the budget.

This can include:

• Removing walls
• Installing structural steel
• Creating new openings
• Altering floors
• Repairing existing structures

While this work isn’t always visually exciting, it’s what makes many of the dramatic transformations possible.

Kitchen Renovation

For many families, the kitchen is the centrepiece of a home renovation.

A project could involve much more than simply replacing cabinets.

You might:

• Remove walls
• Create an open-plan kitchen/dining room
• Extend into the garden
• Add a kitchen island
• Install large sliding or bi-fold doors
• Introduce rooflights or a roof lantern
• Add underfloor heating
• Create a utility room

This is why kitchen renovation costs can vary so widely.

Bathroom Renovations

Bathrooms are another area where specification has a significant impact on price.

Costs can include:

• Sanitaryware
• Tiling
• Plumbing
• Waterproofing
• Lighting
• Heating
• Storage
• Shower enclosures
• Specialist finishes

Moving a bathroom to another part of the property can increase costs further because new drainage and plumbing may be required.

Electrical Work

A major renovation is often the ideal opportunity to modernise your electrical installation.

This might include:

• Rewiring
• New consumer units
• Additional sockets
• LED lighting
• Exterior lighting
• Smart home technology
• EV charging
• Data and networking

Planning electrical requirements early can prevent disruptive changes later.

Plumbing and Heating

Older properties may benefit from upgrading their heating and plumbing systems while other renovation work is taking place.

Depending on the project, this could include:

• New pipework
• Radiators
• Underfloor heating
• Hot-water systems
• Heating controls
• Bathroom plumbing
• Kitchen plumbing

Again, carrying this work out as part of a wider renovation is often more practical than returning to it afterwards.

What About Energy Efficiency?

Energy performance is becoming an increasingly important part of home renovation.

If you’re already opening walls, replacing floors or working on the roof, it may make sense to consider improvements such as:

• Additional insulation
• Energy-efficient glazing
• Improved ventilation
• Modern heating controls
• Draught reduction
• More efficient lighting

Rather than simply making your property look newer, this gives you the opportunity to create a home that’s warmer in winter, cooler in summer and potentially cheaper to run.

Should You Renovate Everything at Once?

Not necessarily.

Some homeowners prefer to renovate their property in stages, particularly if they intend to remain living there during the work.

For example:

Phase 1: Structural alterations and essential repairs
Phase 2: Kitchen and main living areas
Phase 3: Bedrooms and bathrooms
Phase 4: External works and landscaping

However, completing interconnected work together can sometimes be more efficient.

If you’re planning to renovate a kitchen now but already know you’d like to extend it in two years, for example, it may make more sense to consider both projects together.

Good planning at the beginning can prevent paying twice for work later.

Should I Include a Contingency Budget?

Yes.

This is particularly important when renovating an older property.

Until work begins, it isn’t always possible to see everything hidden behind walls, underneath floors or above ceilings.

Unexpected discoveries might include:

• Outdated wiring
• Old pipework
• Damp
• Timber damage
• Poor previous building work
• Structural problems
• Drainage issues

Having a sensible contingency within your overall budget means these discoveries don’t immediately derail the project.

The appropriate contingency will depend on the property and scope of work, but this is something we’d always recommend discussing during the planning stage.

Renovation vs Extension – Where Should You Spend Your Budget?

This is an important question.

Sometimes homeowners start planning a renovation only to realise the existing layout simply cannot provide what they need.

Rather than spending heavily trying to make an unsuitable space work, an extension could provide a much better long-term solution.

For example, instead of simply replacing a small kitchen, you might create a rear kitchen extension incorporating:

• A larger kitchen
• Dining area
• Family space
• Utility room
• Garden access
• Additional natural light

Likewise, if additional bedrooms are required, a loft conversion might provide better value than trying to reconfigure the existing first floor.

The key is to look at the whole property, rather than individual rooms in isolation.

Can Renovating Your Home Add Value?

A well-planned renovation can certainly make a property more attractive to future buyers, but financial return shouldn’t be the only consideration.

You’re also investing in the years you’ll spend living there.

Improvements that can make a property particularly desirable include:

• High-quality kitchens
• Additional bathrooms
• Open-plan family spaces
• Loft conversions
• House extensions
• Improved energy efficiency
• Better storage
• Additional bedrooms
• Attractive indoor/outdoor connections

The best renovations balance property value with quality of life.

How Can I Keep My Renovation Budget Under Control?

One of the best ways to control costs is to make key decisions before construction begins.

Try to establish your:

• Overall budget
• Essential requirements
• Preferred layout
• Kitchen specification
• Bathroom specification
• Flooring choices
• Lighting requirements
• Window and door preferences
• Finishing standard

Changing your mind during construction isn’t always avoidable, but repeated alterations can increase both costs and timescales.

A detailed specification also makes it much easier to understand exactly what’s included in your builder’s quotation.

Cheapest Quote vs Best Value

When comparing renovation quotations, the lowest figure isn’t necessarily the best deal.

Ask yourself:

Are the quotations actually including the same things?

One builder might include waste removal, decorating and finishing work while another excludes them.

That’s why we’ve previously discussed the importance of understanding what is included in a builder’s quote.

A detailed, transparent quotation makes it much easier to compare builders fairly and budget accurately.

How Long Does a Home Renovation Take?

As with cost, timescales depend heavily on the scope of work.

A single-room renovation might take weeks, whereas a complete property transformation involving structural alterations, extensions and multiple trades could take several months.

Factors affecting the programme include:

• Planning permission
• Building Regulations
• Structural engineering
• Material lead times
• Specialist products
• Project complexity
• Changes during construction

This deserves its own guide, which will be the next article within our Home Renovation Knowledge Hub.

Start With the Home You Want – Not Just the Work You Think You Need

One of the most useful things you can do before requesting quotations is to think about the finished result.

Instead of beginning with:

“We need a new kitchen.”

Think:

“How would we like our home to work differently?”

Perhaps you actually need more natural light, somewhere for the family to eat together, better access to the garden and more storage.

That conversation can lead to a very different—and often much better—renovation.

Why Choose Garnet Construction for Your Home Renovation?

At Garnet Construction, we help homeowners transform properties into spaces designed around the way they want to live.

Our projects across Hertfordshire, Essex and North London include:

• Full home renovations
• Kitchen renovations
• Bathroom renovations
• House extensions
• Loft conversions
• Garage conversions
• Structural alterations
• Open-plan transformations

We can help you consider the bigger picture, understand what’s achievable and create a renovation plan that balances your aspirations with your available budget.

Planning a Home Renovation?

If you’re thinking about renovating your property, the earlier you start planning, the better.

Whether you’re modernising a few rooms or considering a complete transformation, Garnet Construction can help you understand what’s possible and turn your ideas into a home you’ll love living in.

Get in touch with the our team to discuss your renovation plans.