Pricing a new flat roof from scratch is tricky without seeing the property, since so much rides on the size of the roof, the material chosen, and what needs to happen to the existing structure before the new covering goes on. Still, some general figures can help you budget sensibly.
What Influences the Overall Price
The roof's size is the obvious starting point, priced broadly per square metre, though small roofs often carry a higher effective rate because setup, access and labour costs don't scale down proportionally. The material chosen matters too, with felt typically the most affordable option, GRP fibreglass sitting in the middle, and single-ply membranes such as EPDM often at the higher end, alongside factors like access, whether old coverings and rotten decking need removing first, and detailing around chimneys or parapet walls. Scaffolding or additional access equipment, sometimes needed on upper-storey flat roofs, will also add to the overall cost.
Rough Cost Ranges
As a very rough guide, a smaller flat roof such as a garage or extension might come in somewhere between £800 and £2,500, while a larger domestic flat roof, say covering a whole rear extension or a bungalow, could range from roughly £2,500 up to £6,000 or more depending on size and material. These are indicative figures only, actual cost depends entirely on the specifics of the job.
Commercial flat roofs, which tend to cover a much larger area, are usually priced individually once the size and specification are known, rather than fitting neatly into a domestic price bracket.
Getting a Proper Number for Your Roof
Brunel Roofing Bristol provides free, no-obligation quotes for new flat roof installations across Bristol and the surrounding area, with all work backed by a 15-year guarantee, so you know exactly what you're paying for and what's covered. This applies whether you're replacing a small garage roof or a larger roof over an extension or commercial unit.
Get a Free Quote for Flat Roof Repairs & Replacement
Every roof is different — the fastest way to get an accurate answer is a quick chat with our team.