Matching materials and pitch
Wherever possible, an extension roof is built to match the tile or slate type, colour and pitch of the existing house, so the join reads as a single coherent roofline rather than two mismatched sections.
Flat vs pitched extension roofs
Single-storey extensions often use a flat or low-pitch roof for practical and planning reasons, while larger extensions can sometimes carry a matching pitched roof — the right choice depends on the extension's size and how it meets the existing structure.
The junction is the hardest part
Where a new roof meets the original house is the most technically demanding part of the job — proper flashing and weatherproofing here determines whether the extension stays dry long-term.
Planning considerations
Depending on size and location, extensions can fall under permitted development or need planning permission — worth checking early, since it can affect design options.
We cover new build and re-roofing projects throughout Chester, Crewe, Warrington, Northwich, Winsford, Macclesfield, Knutsford, Wilmslow and across the rest of Cheshire and the Wirral. Our team regularly works on extension roofing across Cheshire, matched carefully to the existing property. We also handle flat roofing for single-storey extensions specifically.