What is different about replacing a bungalow roof: minimum pitch by covering, the insulation question under Approved Document L, who handles building control in each council, and the fire escape rules if you convert the loft later.
A bungalow has no upper storey to hide behind. The slopes are what you see from the street, and the roof spans the whole footprint of the house. That makes a replacement a bigger share of the building than it would be on a two-storey semi, and it gives a bungalow a few questions of its own.
The first is pitch. Many bungalow roofs sit lower than a Victorian terrace, and a tile has a minimum pitch below which it should not be laid. The second is insulation, which comes up whenever a roof is renovated. The third is what happens if you convert the loft later, because that brings in the fire escape rules in Approved Document B.
This guide takes those in turn, then covers which council deals with building control where you live, the cost ranges the national guides publish, and how the work runs around a house that is staying occupied. It is part of our roof replacement service.
What a bungalow roof asks of the job
A single-storey house puts the eaves within reach of a ladder, and that helps. Scaffold is lower and quicker to put up, the loft hatch is often easy to reach, and the roofers can see most of the roof from the ground. Those are practical gains, but they do not remove the need to survey properly.
Access helps the tidy-up too. With a single storey, old tiles and battens are easier to carry down or chute into the skip, and the working area stays smaller and simpler to keep clear of the neighbour's drive and your own car.
What a bungalow does change is the shape of the problem:
- a large roof area for the size of the house, so the cost of the covering matters more
- hips, the sloping ridges at the corners, in place of the gable ends common on terraces
- a lower pitch on many roofs, which limits the choice of tile
- a chimney stack that may pass through the middle of the roof, with a valley or flashing on each side of it
- a ceiling that is the only barrier between the loft and the living space, so any leak shows quickly
Because the roof is large and low, it also carries the whole weather exposure of the house. When the survey is done, you should be shown the sagging, the slipped slates and the tired underlay in photographs, and offered a repair where a repair is the better answer.
If the survey says the covering is finished, the job is a strip and re-cover. If it says part of the roof is sound, you may not need the whole thing replaced.
Pitch decides which covering you can use
The angle of a slope is its pitch. Every tile has a lowest pitch set by its maker, because below that angle rain can be driven up under the laps. Marley publishes a table by product and advises confirming the figure on the maker's own sheet for your tile. These are the minimums for a selection of its clay and concrete ranges.
| Covering | Marley tile | Minimum pitch |
|---|---|---|
| Clay | Ashdowne | 35 degrees |
| Clay | Lincoln pantile | 15 degrees |
| Concrete | Double Roman | 22.5 degrees |
| Concrete | Edgemere | 17.5 degrees |
| Concrete | Mendip 12.5 | 12.5 degrees |
The spread is wide, from 12.5 degrees to 35 across these five, so a low bungalow roof can suit one tile and rule out another. Marley's clay Canterbury is the name of a tile in that table, not the city, and its minimum is 40 degrees.
Natural slate has its own limits. For natural slate, BS 5534 puts the floor at 20 degrees, assuming moderate exposure, a 500 mm slate and a 115 mm lap. Cupa, a slate maker, rules out hook fixings on any pitch under 25 degrees. A tile laid below its minimum invites water in at the next wind-driven shower, so the angle is measured from the loft rafters or the gable on the survey. Where the pitch is too low for any tile, the answer is a different system altogether.
Insulation at the re-roof
Roofs lose a lot of heat, so Approved Document L, the Building Regulations guidance on energy, has something to say when a roof is renovated. The Building Regulations' own definition of renovation takes in adding a layer to a wall, floor or roof, or swapping out a layer already there, and the roof counts as one of those thermal elements.
Table 4.3 of Approved Document L (2021 edition, with the 2023 amendments) sets targets for existing elements that are renovated. A U-value measures heat loss through a surface, and a lower figure is better. A roof that currently loses heat at a rate worse than 0.35 W/m²K is expected to reach 0.16 once renovated.
Paragraph 4.13 lets you stop short of that where the upgrade cannot be done, either technically or in use, or where the saving would take longer than 15 years to repay itself. In that case you improve the roof as far as is feasible and no further, which is still worth doing while the old covering is off.
Whether your particular re-roof counts as renovation is a call for the building control team, so ask them early. Approved Document L 2026 takes effect from 24 March 2027, not before, for work not connected with higher-risk buildings. In a bungalow the loft insulation is usually reachable from the hatch, which makes a top-up easier to plan alongside the new covering.
Which council handles the approval
The Planning Portal sets the national test. Normally no application is needed when under 25 per cent of the building envelope and under 50 per cent of the roof is touched by the work. A bungalow re-roof will often take in more than half of the roof, so plan to deal with the council. Weight is the second trigger: if the new covering adds 15 per cent or more to the load, or would behave significantly differently in a fire, approval is needed.
Who you deal with depends on where the house is:
- Thanet District Council has its own building control team, reached on 01843 577522
- Dover District Council also has its own service, and counts a like-for-like change of roof covering as work needing approval
- Folkestone & Hythe District Council runs a separate team on 01303 853538, and its page puts replacing a roof covering among the changes that may need approval
- Ashford Borough Council's building control deals with Ashford addresses
Canterbury City Council and Swale Borough Council both work through the STG Building Control partnership, on 01634 331133.
The Dover line belongs to Dover addresses only, and no Kent district publishes a percentage of its own.
A private route also exists. A registered building control approver can do the same work. Registration with the Building Safety Regulator started on 6 April 2024, although private building control was already around. Our guide on the fifty per cent roof rule explains the national test further, and heavier roof covering approval covers the weight rule.
Planning for a loft conversion later
If a loft conversion is likely in a few years, it pays to think about that before the new roof goes on, because a conversion changes what the roof has to do, and cutting into a brand-new covering later is a waste of a good roof. Our guide to a re-roof with a loft conversion covers the sequence.
Approved Document B, the fire safety guidance, is the part to plan for early. It deals with escape from the new floor in two ways:
- a dwellinghouse with a storey more than 4.5 m above ground level needs either a protected stairway or an alternative escape route, in which the top storey is separated from the lower storeys by fire-resisting construction of at least 30 minutes and has its own final exit
- an escape window needs a clear openable area of at least 0.33 m², with the bottom of the openable part no more than 1100 mm above the floor
Measure the height from the ground to the new floor before you assume anything about the stair, and ask building control to confirm which route applies. A converted bungalow loft is one extra storey, and whether it lands above 4.5 m depends on the house.
The other thing to check at the re-roof is the roof windows. In Approved Document L Table 4.2, a roof window in an existing dwelling must reach 1.4 W/m²K, or Band B for window energy rating. A rooflight is a separate product with a separate figure, 2.2. Chimney-breast removal below the loft, if you plan it, always needs building control approval.
Cost ranges, scaffold and living in the house
The national guides disagree widely on a whole new roof, so here are three, each named and dated, none of them our prices. Which? says prices are likelier to run high in the South East, and HomeBuilding agrees that labour rates there are higher.
| Job | Range | Source |
|---|---|---|
| Whole roof, average three-bedroom house | £7,000 to £21,000, ex VAT | Which? Trusted Traders, Nov 2025 |
| Three-bed semi, 65 m², plain concrete tiles | £10,000 to £15,000 | HomeBuilding, Sep 2025 |
| New roof, average | around £5,250 | MyJobQuote, Oct 2026 |
HomeBuilding also says Welsh slate on that same semi might reach £18,000. None of these is a bungalow, so treat them as a spread and not a quote. On a bungalow the area of covering and the number of hips set the figure more than the number of storeys, because each hip adds cutting and ridge work.
Scaffold is priced after the survey. If it stands on the public footway, Kent County Council issues the licence, the scaffolder applies, and 5 working days' notice is needed; the 2026 to 2027 fee is £52 per week. Kent County Council also permits skips on the highway, at £45 per week for 2026 to 2027, for a skip no longer than 5 m and no wider than 2 m. If the bungalow was built or refurbished before 2000, assume asbestos may be present in cement sheet or soffits until a survey says otherwise.
