Cluster info · Pricing & tax

Estimating the cost of a new build: practical method

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By Edouard Hennin, Provisional reception expert Published on 27 May 2026 Updated on 27 May 2026 6 min read

Estimating the cost of a new build requires combining m² ratios with an analysis of items specific to your project. A simple rule of three is never sufficient — the Construction Confederation (Embuild) and the Buildwise technical notes regularly publish sector reference indices.

This practical method combines market ranges, technical options and safety margins to arrive at a credible envelope.

1. Understanding the stakes

Before going into detail, let us set the general framework. Estimating the cost of a new build requires combining m² ratios with an analysis of items specific to your project. A simple rule of three is never sufficient.

2. Practical 2026 reference points

In practice, several reference points help frame the topic in 2026. Ranges and conditions evolve regularly, and it is useful to cross-check several reliable sources before making a structuring decision.

3. Avoiding common pitfalls

Some pitfalls recur regularly: incomplete quotes, poorly verified conditions, lack of professional support. A preliminary audit avoids most disappointments.

Want to secure your project? Request a free quote from our expert team. We accompany you in verifying your file and resolving sensitive points.

Common questions

What are the main 2026 reference points for construction cost estimates in Belgium?

Ranges and conditions vary depending on region, standing and exact project nature. The orders of magnitude indicated in this guide are a compass but do not replace personalised analysis.

Should I call on an expert to validate my file?

For structuring projects, an external eye is often profitable: it avoids contractual and technical blind spots. Our construction audit can intervene before signing.