Do you need building regulations approval for plumbing and heating work?

A new boiler, an extra radiator or a bathroom in the loft can look like a job for the plumber alone. In England, some of this work also falls under the Building Regulations 2010, which means approval, or a certificate from a registered installer, may be needed. This guide summarises what GOV.UK says, in plain terms. The pages were checked on 11 October 2026. Rules differ in Scotland and Northern Ireland, and Wales has its own Approved Documents, so check with a building control body if you are unsure.

Which plumbing and heating jobs are covered?

GOV.UK says you might need building regulations approval for many alteration projects. The ones relevant to plumbers and heating engineers include installing or replacing a heating system, adding extra radiators to a heating system, and installing a bathroom that will involve plumbing. GOV.UK also warns that works not on its list could still need approval, so research your particular project.

Some work is exempt. GOV.UK lists most repairs, replacements and maintenance work as exempt, with exceptions that include heating systems, and it names replacing baths, toilets, basins and sinks. Some hot water storage systems holding less than 15 litres are also listed as exempt. Even exempt work must still meet safety and energy efficiency standards.

Gas work has an extra layer. HSE says anyone employed to work on gas appliances in domestic premises must be a Gas Safe registered engineer, and installing or reinstalling an appliance counts as gas work. Our guide explains how to check a Gas Safe engineer.

How a competent person scheme saves you the application

You do not have to apply yourself if you use someone registered with a competent person scheme. GOV.UK says an installer, for instance of boilers, can self-certify that the work meets building standards, notify your local authority on your behalf and give you a certificate within 8 weeks of completion. The certificate can be used as evidence of compliance and shows up in solicitors' searches when you sell. These schemes carry insurance-backed warranties and complaints procedures.

GOV.UK's list of current schemes names who covers what:

• Gas combustion appliances: Gas Safe Register.
• Heating or hot water systems and controls: APHC, BESCA, Blue Flame Certification, Gas Safe Register, Certsure, HETAS, NAPIT and OFTEC.
• Toilets, sinks, washbasins, fixed baths, showers or bathrooms in dwellings (not involving shared or underground drainage): APHC, BESCA, Certsure, HETAS and NAPIT.

You can search the Competent Persons Register on GOV.UK to find a tradesperson or to check that they belong to a scheme.

If you need to apply yourself

For work that needs approval and is not done under a scheme, contact a building control body. That can be your local council, applying through the Planning Portal, or a private registered building control approver. GOV.UK describes three application types:

1. Full plans. The most thorough option. You can expect a decision within 5 weeks, or 2 months with your consent, and usually a completion certificate within 8 weeks of the work finishing.
2. Building notice. For smaller projects. You can start work 2 days after the notice is submitted, but you do not get formal approval.
3. Regularisation. Retrospective approval for work already done, from a local authority only.

Fees depend on the building control body. Local authorities base theirs on their costs, while private approvers negotiate directly.

What happens if the work skips the rules?

GOV.UK says the person doing the work could be prosecuted and fined if they do not comply, and the building control body could make you pay to fix faulty work. Without approval you will not have the certificates of compliance you may need when you sell your home. Landlords have separate gas paperwork on top of this, covered in our guide to the landlord gas safety record.

Which standards apply?

The rules are set out in the Approved Documents. GOV.UK's collection for England includes Approved Document G on sanitation, hot water safety and water efficiency, Approved Document J on combustion appliances and fuel storage systems, and Approved Document L on conservation of fuel and power. Your installer should know which parts apply to your job. Ask them to say so in the written quote.

Questions to ask before you book

A few questions at the quote stage keep the paperwork from becoming your problem later:

1. Which competent person scheme are you registered with, and can I check it on the register?
2. Will you notify the local authority, and who pays any fee?
3. When will the certificate arrive? GOV.UK says to expect it within 8 weeks of completion.
4. Does the quote name the work as a heating system replacement, new radiators or a new bathroom, so there is no doubt about what is being certified?

Keep the certificate with your deeds or home records. GOV.UK says it appears in solicitors' searches, so a buyer's solicitor may ask for it.

When the job is bigger than a swap

Moving a bathroom, adding a shower room in a loft or reworking where pipes and a boiler sit is design work as well as plumbing. If you are changing the layout, an architect can draw it up. MyLocalArchitects is a sister directory of UK architects. If the project is a loft conversion or extension in London and you need drawings for building regulations, FixedFeePlans, another site in our network, produces planning and building regulations drawings at a fixed fee.

Once the design is settled, you can find a plumber or heating engineer for the install through our bathroom fitting and boiler installation pages.