Author name: James Hill

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.

Building regulations can change far more than approvals. They can affect insulation, glazing, ventilation, structure, drainage and labour requirements, which means they also affect cost. This guide explains where extension and refurbishment budgets often move and what helps produce a more reliable estimate.

Concrete slab pricing is rarely just about the pour. This guide explains what builders and project planners should allow for before pricing a slab, including excavation, muck-away, sub-base, reinforcement, access, plant and site constraints.

Groundworks packages can become expensive quickly when buried services are poorly understood. This guide explains how underground cable risk should affect scope, preliminaries and quote allowances.

Tool and equipment costs are often buried in overhead or ignored altogether. This guide explains how builders should think about recovering those costs in a quote without damaging margin.

Dry-lining can be easy to underquote when labour, framing, waste, access and finishing details are not priced properly. This guide explains how to build a cleaner, more reliable estimate.

Building a garage can look straightforward until foundations, roof choice, access, drainage, electrics and permissions start affecting the estimate. This 2026 guide breaks down realistic garage build cost drivers in the UK.

Porch cost in the UK depends on more than size alone. Foundations, roof type, glazing, materials and how the new structure ties into the house all affect the final quote.

Before you price an extension, new build or groundworks package, you need more than drawings and a rough scope. Site conditions, access, drainage, utilities, waste and preliminaries can all distort the price if they are missed too early.

Estimating a roof tiling job properly means more than applying a rough m² rate. Roof pitch, tile coverage, wastage, labour, access and detailing all affect the real cost.