Jac Jones Construction

Guides

Straight answers on building in South Wales.

Costs, foundations and drainage explained by the people who dig, pour and build them — no jargon, no vague figures.

Self-build

How Much Does It Cost to Build a House in South Wales? A Realistic Guide

Stage-by-stage build costs for a new house in South Wales, from pre-construction fees to external works, with realistic 2026 ranges.

12 September 2026 · 9 min read

Groundworks

Raft Foundation Guide: What You Need to Know Before You Build

When a raft slab is the right foundation, the eight stages of building one, and how it compares with strip footings.

12 September 2026 · 7 min read

Drainage

SABS Drainage in Wales: What Every Self-Builder and Developer Needs to Know

Sustainable drainage is a legal requirement in Wales. Here is what SABS approval involves and what good drainage looks like on a residential site.

12 September 2026 · 7 min read

Work with us

Planning a build in South Wales?

Send us your drawings or just describe the plot. We will tell you honestly what is involved and what to budget.

Bespoke homeNew build, design and build, or an individual home.
Swimming poolIndoor, outdoor or part of a wider project.
Groundworks and civilsGroundworks package, civils or enabling works.
Something elseA project that does not fit neatly in a box.

Would rather talk it through? Call 07446 832296