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:

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.

Up to
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
Up to
New build warranty and insurance cover up to £1m, up to £500,000 for conversions
Up to
Warranty and insurance cover for new build continuous structures up to £25m and up to £5m for conversions

This applies to policies for plots registered with us from 1 October 2019. Please see the full Buildmark policy document below for all the conditions and exclusions that apply. Homes registered prior to 1 October 2019 may benefit from insurance protection for certain breaches of Building Regulations if NHBC Building Control Services Limited is appointed for and carries out building control for the property. If we have provided this cover, it will be clearly shown on the Buildmark insurance certificate, and a description of the cover included in the policy booklet. Please refer to your own policy documents for all the terms and conditions that apply to your home.

* 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).

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 April 2021.

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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.

Get a guide price for Buildmark cover

Get Price

Register a new site for Buildmark (SNIN)


Join or Re-join the NHBC register


Contact us to discuss your project


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.