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Planning permission

Planning permission is not normally required for installation or replacement of a boiler or heating system if all the work is internal, though if you live in a listed building you should check with your local planning authority.

If the installation requires a flue outside, however, it will normally be permitted development if the conditions outlined below are met.

  • Flues cannot exceed the highest part of the roof by one metre or more
  • If the building is listed or in a designated area even if you enjoy permitted development rights it is advisable to check with your local planning authority before a flue is fitted. Consent is also likely to be needed for internal alterations
  • In conservation areas, World Heritage sites, national parks, areas of outstanding natural beauty, and the Broads the flue should not be fitted on the principal or side elevation if it fronts a highway.

Additional rights are also available for installations of flues relating to biomass1 and combined heat and power2 systems.

If the project also requires an outside building to store fuel or related equipment the same rules apply to that building as for other extensions and garden outbuildings.

Build Aviator's estimating service can help you plan your project by providing an accurate cost of the proposed changes. Find out more3.

Once costs have been estimated, the quick quote finance calculator4 from Selina Advance can take all of the hard work out of searching and securing the funds needed for your project.

Find a Trade Professional

Use our partner directories from CIAT, FMB, RIBA, or RTPI to find an chartered architectural technologist, builder, architect or planning consultant to help with your project or development.

Find a trade professional


Useful links

Make an application Project estimating service


Planning consultancy calculator Financing your project
    1. https://www.planningportal.co.uk/permission/common-projects/biomass-fuelled-appliances
    2. https://www.planningportal.co.uk/permission/common-projects/micro-combined-heat-and-power
    3. https://www.planningportal.co.uk/permission/home-improvement/estimating-service
    4. https://www.planningportal.co.uk/permission/home-improvement/quick-quote-finance-calculator
    5. https://www.planningportal.co.uk/permission/common-projects/extensions
    6. https://www.planningportal.co.uk/permission/common-projects/outbuildings

    The Planning Portal is delivered by PortalPlanQuest Limited which is a joint venture between TerraQuest Solutions Limited and the Department for Levelling Up, Housing & Communities. All content © 2022 Planning Portal.

    The Planning Portal is delivered by PortalPlanQuest Limited which is a joint venture between TerraQuest Solutions Limited and the Department for Levelling Up, Housing & Communities. All content © 2022 Planning Portal.