Your Buildmark policy Your Buildmark policy

Custom-build, build-to-contract and self-build homes

Whether it’s a modest bungalow or on a grander scale, Buildmark is the warranty and insurance product for custom-built homes

Why choose NHBC for custom-built homes?

If you’ve been appointed to build a home on behalf of an individual client who intends to live there, then Buildmark is the right warranty and insurance product to choose because you and your client will benefit from:

Cover from exchange of contracts

Buildmark provides your client with pre-completion cover if you’re unable to complete the build.

Cover from exchange of contracts

10 years cover after completion

Buildmark will provide warranty and insurance cover for the new home for 10 years post-completion. Unlike with an Architect’s Certificate, as long as the terms of Buildmark cover are met, there is no need for the home buyer to prove negligence in the event of a claim.

10 years cover after completion

Expert technical support

Your allocated building inspector will visit your site at key build stages to support you in meeting the NHBC Standards. The relationships our field-based inspectors have with our builders, backed by our extensive in-house technical expertise and full customer service support, are highly valued.

Expert technical support

Association with the market-leading brand

We are the leading warranty and insurance provider for new homes in the UK. Our Buildmark product covers around 80% of new homes built in the UK.

Association with the market-leading brand

A one-stop shop for warranty, Building Control and consultancy services

For consistency, quality and efficiency many of our builders choose to work with us for Building Control as well as services such as health and safety consultancy, energy ratings and land quality endorsement. We are a unique source of information, data and support.

A one-stop shop for warranty, Building Control and consultancy services

Buildmark for custom-built homes

Buildmark is our warranty and insurance product for newly built or newly converted homes. It currently protects around 1.5 million homes in the UK.

Buildmark provides pre-completion protection; a two year builder warranty period backed by the NHBC resolution service and guarantee; and then an eight year insurance policy for physical damage to the home caused by a failure to build to the NHBC Technical Requirements.


Deposit protection

Protection for purchaser’s deposit between exchange of contracts and legal completion

Up to 10% of the original purchase price or £100,000, whichever is lower


Warranty and insurance

New build warranty and insurance cover up to £1m, up to £500,000 for conversions


Continuous structures

Warranty and insurance cover for new build continuous structures up to £25m and up to £5m for conversions


Cover period

Years 0-2 Builder warranty period and NHBC guarantee
Years 3-10 Buildmark insurance period

Policy includes

  • Cover for breaches of certain Building Regulations (where we carry out Building Control)
  • Cover for alternative accommodation and storage costs
  • Minimum claim value* instead of an excess
  • Cover against contaminated land

Please see the full Buildmark policy document below for all the conditions, limits and exclusions that apply.

* The minimum claim value explained: We don’t require policyholders to pay the first part of any claim. Instead, we operate a minimum claim value (MCV) which means that if the cost of a valid claim exceeds the MCV we will do the work or pay the cost in full and the policyholder will not have to make any contribution. The MCV for plots registered from 1 April 2019 is £1,750 (increasing by £50 on 1 April in each subsequent year).

Buildmark policy document

To see all the terms and conditions and policy limits that apply, please see the current Buildmark policy document that applies to newly built, converted or renovated homes registered with us from 1 October 2019.

Download PDF  Download PDF

Buildmark Policy Document

What to do next...

You need to be registered with NHBC to offer Buildmark warranty and cover for your new homes. If you’re not yet registered with us, please visit the NHBC registration section first. If you’re already registered with us, you can send us the details of your new site straight away.

Self-build homes

If you’re building a home to live in yourself (we call this self-build) then we don’t currently offer our own warranty and insurance product. However, we have an agreement with Self-Build Zone, one of the market-leading suppliers in the self-build sector, who you can approach to discuss your self-build warranty, site insurance and other requirements.

For more information, or to request a quote, please visit or call 0333 123 2322, available Monday - Friday 9am to 5pm.

NHBC Services Limited is an Introducer Appointed Representative of SENNOCKE INTERNATIONAL INSURANCE SERVICES LIMITED. SENNOCKE INTERNATIONAL INSURANCE SERVICES LIMITED are authorised and regulated by the Financial Conduct Authority for its insurance mediation activities. SENNOCKE INTERNATIONAL INSURANCE SERVICES LIMITED incorporated and registered in England and Wales with company number 02489110 Trading as Self-Build Zone, and BUILD-ZONE SURVEY SERVICES LIMITED incoporated and registered in England and Wales with company number 07644180 and whose registered office is at 6 Pembroke Road, Sevenoaks, Kent TN13 1XR.

Buildmark Policy Document

Frequently asked questions

Check out our list of frequently asked questions and answers.
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