AI QS Blog

Construction Cost Guides
& Industry Insights

Expert pricing breakdowns, quantity surveying tips, and practical cost data for UK builders, contractors, and QS professionals.

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Cost Guide

How Much Does a House Extension Cost in the UK in 2026?

A complete breakdown of extension costs per m², from single-storey rears to double-storey builds. Regional pricing, hidden costs, and what actually drives your budget.

March 2026 · 8 min read Read →
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QS Explained

What Is a Bill of Quantities? A Plain English Guide for Builders

BOQs explained without the jargon — what they are, why they matter, what goes in them, and how they protect your profit margin on every job.

March 2026 · 6 min read Read →
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Cost Guide

Loft Conversion Costs in 2026: Dormer, Velux, Hip-to-Gable & Mansard

What each type of loft conversion actually costs in 2026, including structural steel, building regs, and the costs most people forget to budget for.

March 2026 · 7 min read Read →
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Cost Guide

Structural Steelwork Costs in 2026: RSJs, Portal Frames & Fabrication Rates

What steel actually costs in 2026 — per tonne, per beam, installed. Detailing, fabrication, installation rates and what to look out for when pricing metalwork.

March 2026 · 7 min read Read →
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Guide

How to Price a Building Job Accurately (Without Losing Money)

The practical method for pricing construction work — from take-off to markup. Stop guessing and start winning tenders with numbers you can stand behind.

March 2026 · 9 min read Read →