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Sources checked 12 November 2026
Do I need planning permission or building regulations for a new roof?
Do I need planning permission for a new roof? Usually not, but in most cases the work needs building regulations sign-off. This guide is for homeowners and landlords in Luton and the towns around it, and sets out which permissions apply, where conservation areas, listed buildings and estate schemes add more, and what paperwork to keep.
Get the roof looked at
Name, number and postcode is enough. We phone back to hear what is happening and set a time to see the roof.
Does a new roof need building regulations approval?
In most cases, yes. Planning Portal says of re-roofing that in most situations this work will need Building Regulations approval, and GOV.UK lists replacement of roof coverings on pitched and flat roofs as work you must tell a building control body about.
Smaller repairs are different. Planning Portal says no application is usually needed where work affects less than 50 per cent of the roof and less than 25 per cent of the whole building envelope. Approval comes back in if the work goes beyond those limits, involves structural alterations, uses a covering that performs significantly differently in a fire, or increases the weight of the covering by 15 per cent or more.
What is a competent person scheme, and what certificate should I get?
It is a government-authorised scheme that lets a registered roofer sign off their own work, so you do not have to apply to building control yourself. GOV.UK lists CompetentRoofer and NAPIT as the schemes for pitched and flat roof coverings, and says self-certification is instead of getting building regulations approval.
Without a registered roofer, GOV.UK says you will have to submit a building notice or full plans application and pay a fee. Either way, you should end up with a certificate of compliance. If a registered roofer's certificate has not arrived within 30 days of completion, contact the scheme operator, and keep it safe, because you may be asked for it when you sell.
The penalties are real: GOV.UK warns that for non-compliant work you could be prosecuted and face unlimited fines, and the council can make you put it right at your own expense. Before agreeing a price, ask any roofer whether they are on a scheme, or who will notify building control. Our Luton roofing team sets out which permissions apply to your roof before work is agreed, and our roof replacement page explains the job itself.
Will I have to add insulation when the roof is replaced?
Usually, yes. Planning Portal says re-covering a roof should also include for improving the thermal insulation. Approved Document L counts stripping a roof back to its structure as renovating a thermal element, and where more than half of it is renovated the whole element should reach an improved U-value of 0.16 W/m²K, unless that would not pay back within 15 years or is not technically feasible.
On a pitched roof with a cold loft, the upgrade is often made at ceiling level; Milton Keynes building control, for example, says 270mm of mineral wool at ceiling level is adequate. New regulations under the Future Homes and Buildings Standards take effect on 24 March 2027, and the government circular does not say whether renovation targets for existing homes will change.
What if the new roof is heavier or lighter than the old one?
Then the structure needs checking. Approved Document A treats an increase in roof loading of more than 15 per cent as significant, and if the existing timbers cannot carry it, strengthening them counts as a material alteration. A big reduction in weight matters too, because the roof and its anchorage then need checking against wind uplift.
This usually comes up when changing material, such as concrete tiles to slate or the reverse. Planning Portal says changing the covering is likely to need approval, and advises getting a structural engineer or surveyor to check first.
When does a new roof need planning permission?
When it changes how the house looks, or when local rules remove the usual freedom. Planning Portal says roof work that does not materially affect its external appearance usually needs no planning permission, so a like-for-like re-roof is normally fine. Rooflights are permitted development if they project no more than 150mm from the roof slope and do not rise above the existing roof.
A council can remove those rights with an Article 4 direction. In St Albans, the Cunningham Avenue direction removes them for any other alteration to the roof, including a change of materials, and says artificial slates and concrete tiles are not acceptable replacements for real slate and clay; like-for-like renewal still needs no permission. Parts of the city's conservation area are also covered by Article 4 directions, and there nearly all types of development and external alterations need planning permission. Our St Albans page has more.
In conservation areas without a direction, the controls are lighter but still reach roofs. Central Bedfordshire Council says permission is needed there for additions, alterations or extensions to roofs, and for rooflights or solar panels that protrude more than 150mm. Luton has five conservation areas, and none of its current Article 4 directions concerns roofs, chimneys or materials. If you are unsure whether your street is covered, ask the council's planning team before work is booked.
What about listed buildings?
Listed building consent is needed for work that alters a listed building's special character, and doing it without consent is a crime. Historic England says consent is needed for all work to a listed building that involves alterations, extensions or demolition affecting its character. Central Bedfordshire Council says repairs may usually go ahead without consent if they are done exactly like-for-like, and its design guide gives replacing a slate roof with tiles as an example of work that does need it.
Under section 9 of the Planning (Listed Buildings and Conservation Areas) Act 1990, unauthorised works are an offence, punishable by up to six months in prison on summary conviction or up to two years on indictment, a fine, or both. There is a narrow defence for urgent works needed for safety, health or preservation, kept to the minimum and justified to the council in writing as soon as reasonably practicable. St Albans City and District Council notes there is no fee for a listed building consent application.
Are there extra rules in Letchworth and Welwyn Garden City?
Yes. Both garden cities add an estate-wide consent on top of planning law, whether or not a house is listed or in a conservation area.
In Letchworth, the Heritage Foundation's Scheme of Management, made under the Leasehold Reform Act 1967, means owners must not make alterations materially affecting the external appearance of their home without the Foundation's written consent. Its External Changes Form, revised July 2026, lists re-roofing, flat or pitched, among the works that need consent, asks for a full specification including tile type, and mentions no exemption for like-for-like work. The Foundation says its consent is separate from planning permission, listed building consent and building regulations. See our Letchworth page.
Most of Welwyn Garden City is covered by the council's Estate Management Scheme, under which residents may need consent before changing their home. The council's register shows like-for-like re-roofs being applied for and granted, such as a replacement like for like roof on Cole Green Lane in January 2026. Its policies put solar panels, rooflights, dormers and flues on the rear or side roof slope, allowing the principal slope only where the council judges the change would not have a detrimental impact. See our Welwyn Garden City page.
Questions people ask us
Do I need building regulations to replace roof tiles?
For a full re-roof, usually yes, unless a CompetentRoofer or NAPIT roofer self-certifies it. Repairs affecting less than half the roof and less than a quarter of the building envelope usually need no application.
Can I replace my roof in a conservation area?
Usually, if the new roof matches the old one. Changing the material or adding rooflights can need planning permission, and an Article 4 direction can remove the usual freedoms, so check with the council first.
What happens if I re-roof without approval?
GOV.UK says you could be prosecuted and face unlimited fines, and the council can make you put the work right at your own expense. A missing certificate can also cause problems when you sell.
Sources and further reading
- Building regulations: Re-roofing, Planning Portal, undated (© 2026)
- Building work, replacements and repairs to your home, GOV.UK (shows "Updated 3 November 2014"; metadata 2026)
- Building Regulations: Work to an existing roof, Planning Portal, undated (© 2026)
- Competent person scheme: current schemes and how schemes are authorised, updated 17 Sep 2026
- Approved Document L Vol 1: Dwellings, 2021 edition incorporating 2023 amendments
- Re-roofing Guide (M10979), MK Building Control, undated
- The Future Homes and Buildings Standards: building circular 01/2026 letter, 24 Mar 2026
- Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments
- Roof (planning permission / permitted development), Planning Portal, undated (© 2026)
- Permitted development rights for householders: technical guidance (shows "Updated 10 September 2019")
- Cunningham Avenue Article 4 Direction, in effect 3 Nov 2014
- Living in a Conservation Area (leaflet PH6(b)), SADC, rev. May 2012
- Conservation areas and planning permission, Central Bedfordshire Council, undated
- Conservation areas, Luton Borough Council (CSV dated 7 Aug 2026)
- Current Article 4 directions, Luton Borough Council
- What Permission Might I Need to Make Changes to My Older Home?, Historic England, undated
- Do I need listed building consent?, Central Bedfordshire Council, undated
- Design Guide SPD Chapter 5 Context and Identity, Central Bedfordshire Council, adoption date not shown
- Planning (Listed Buildings and Conservation Areas) Act 1990, s.9 Offences
- Listed buildings, SADC
- Scheme of Management (Leasehold Reform Act 1967), Heritage Foundation, plan printed 29 Oct 2004
- External Changes Form, Heritage Foundation, revised July 2026
- Why do you need to talk to us? (altering your home), Heritage Foundation, undated
- Estate Management Scheme, Welwyn Hatfield BC (page 2021)
- EMS application 6/2025/2408/EM, 18 Cole Green Lane, WHBC planning register
- Estate Management Scheme Policies (Energy Efficiency and Other Roof Alterations), WHBC, 15 Aug 2022
Before you phone
These details help us understand the roof before we see it:
- Where the water shows, and in what weather
- Slate, tile, flat roof or not sure
- Roughly when the house was built
- Any photos, even from the street
- Conservation area or listed, if you know
Written by Luton Roofworks, roofers in Luton covering south Bedfordshire and west Hertfordshire. If your roof needs looking at, use the form or call 01582 377176.
Related roofing work
Roof replacement
When patching no longer makes sense, we strip and re-cover the pitched roof with new underlay, battens and fixings, and explain the approvals it needs.
Flat roofing
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Roof inspections
A look at the roof from outside and the loft, with photographs and a written note of what needs doing now and what can wait.
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What causes slipped roof tiles, and how should ridges be fixed?
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What causes a chimney leak, and how is lead flashing repaired?
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Storm damage to your roof: what will insurance cover?
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Tell us about the roof
Give us your name, phone number and postcode, pick the closest match to the problem, and we will ring to discuss it and fix a time to inspect. Or call 01582 377176.