How much does it cost to build a luxury house in London or Hertfordshire?

When estimating the cost of your new build project, you will have to consider several different factors. For new build luxury house in London or Hertfordshire, expect the minimum building cost to be somewhere between £1,750 and £4,000 per square metre. This will depend on the plot, size and type of the property, and design specifications. For example, how many floors will the new house have, does your proposed design include floor-to-ceiling glazing, are there any special planning considerations, is there an existing structure that has to be demolished, etc. All these questions and more should be answered when preparing your budget.
Cost of building a luxury new build home in London or Hertfordshire

When starting your estimation process, you could begin by looking at the items below:

  • Plot cost: The cost of the property site will vary mainly depending on the location and the size. A plot which has consent for the construction of a new property will cost more than a similar site without building approval. However, there is a significant risk involved when buying a plot without approval and applying for permission later. Sometimes, it might be cheaper to by an existing older property, demolish it and build a new house in its place.
  • Architectural design: Expect to pay up to £50,000 to have a complete set of drawings prepared by an experienced architect and structural engineer. As we work with some of the most skilled architects in London and Hertfordshire, we can offer architectural services at discounted rates if you opt for our design and build London services.
  • Superstructure: Traditional masonry (block and brick walls) tend to be more cost-effective since many London builders have more experience with their construction. Other, less common, forms of construction, such as cross-laminated timber are more likely to cost up to 15 per cent more.
  • Energy efficiency: New build construction is the perfect opportunity to create eco-friendly, highly insulated home, which will significantly reduce the energy bill. While it might be slightly more expensive to build an energy-efficient house, it will add value to the property and save money on your energy bills while offering many environmental benefits.
  • Glazing: large areas of glazing, such as floor to ceiling sliding glass doors, will cost more than standard masonry with more traditional doors and windows.
  • Kitchen fitting: A high-quality hand-painted kitchen can cost anything between £50,000 to £200,000.
  • VAT: There is no value added tax payable on the cost of building a genuine self-contained new house. However, there are a few items where VAT is always applicable, such as the architect's and consultant's fees.

Example of our work - Luxury new build home in Hertfordshire

Luxury new home construction in London and Hertfordshire


This bespoke new house, which was designed by Stanley Architects and built by our London construction company, boasts a living area of over 6000 square feet, which includes six double bedrooms with en-suites, a large sitting room and an open plan kitchen diner.

Bespoke features

Floor to ceiling glazing
Double height entrance hall with feature staircase
Mezzanine balcony 
Sliding glass doors leading to the garden
Luxury lighting
Bespoke joinery
Hand-painted kitchen
Outdoor pool

Our team of luxury house builders completed this bespoke new-build mansion in Bushey, Hertfordshire within the clients budget of £1,500,000.

Benefits of building a house from scratch

Luxury new build mansion in north London


The main advantage of building a new house is the freedom of design. When you build a house from scratch, you are free to create a bespoke home tailored to your individual tastes and requirements.

When planning the construction of a new house, bear in mind that your home needs to suit your lifestyle.

Older homes were not designed for the modern way of living, which makes new builds such a popular option.

You might consider creating a large sitting area or a bright open-plan kitchen diner with sliding glass doors that lead to the garden to make entertaining your family and guests easier. Or, you might want to add en-suites to all the bedrooms for convenience. If you work from home, you could also create a comfortable office in your new house. Alternatively, you could set up a home gym in one room to improve your lifestyle.  

Can you build a luxury house for profit?

Luxury new build house in Hertfordshire

In London and Hertfordshire, plots with building approval will come with high premiums. Sometimes, the price you would pay to purchase a piece of land to build a house on might exceed the cost of the actual house construction. 

Whilst it is still possible to profit from building a luxury property, the markup might not be very high.

Enquire now

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Book a site visit - 0748 529 8186
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Email: office@marriottconstruction.co.uk

We operate across North London, North West London and Hertfordshire. Including BarnetBushey, Camden, Edgware, Finchley, Hampstead, Hendon, IslingtonMill Hill, Potters BarStoke Newington and Watford