Author name: James Hill

James Hill is a quantity surveyor and director of Cost Estimator Ltd. He writes Cost Estimator guidance for homeowners, builders, developers and architects who need clearer construction pricing before money is committed. His articles focus on practical estimating issues: drawings, scope gaps, quantities, labour and material allowances, preliminaries, exclusions, tender pricing, quote comparison and cost drift. You can also find and connect with James Hill on LinkedIn.

Annex / Granny Flat Cost UK 2026: Budget Ranges, Cost Drivers and What to Allow For

Annex and granny flat costs in the UK can vary sharply depending on size, specification, utilities, drainage and whether the space is fully self-contained. This 2026 guide explains realistic budget ranges, what pushes the price up, and how annex costs compare with garden rooms and garage conversions.

Annex / Granny Flat Cost UK 2026: Budget Ranges, Cost Drivers and What to Allow For Read More »

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