Material prices, labour availability and demand for skilled builders across South Wales have all increased in recent years. This article explains why costs are going up, how it affects your project, and what homeowners can do to plan properly.
At Mark James Building Contractors Ltd, we work with homeowners across Cardiff and surrounding areas and aim to give honest, realistic advice before work begins.
Why Are Construction Costs Increasing?
1) Material Price Increases
Key building materials have seen steady price rises, including:
Timber
Steel
Insulation
Plasterboard
Roofing materials
Global supply issues, transport costs and increased demand all play a part.
2) Skilled Labour Shortages
Good tradespeople are in high demand. Bricklayers, carpenters, electricians and plumbers are all busier than ever — particularly in Cardiff and commuter areas.
This increases labour costs but also reinforces the importance of:
reliable scheduling
experienced project management
realistic timeframes
3) Higher Demand for Home Improvements
Many homeowners are choosing to:
extend instead of moving
renovate older properties
upgrade kitchens and living spaces
This sustained demand pushes prices up, especially for quality builders.
How Rising Costs Affect Extensions and Renovations
Extensions
Groundworks and structural materials are often the biggest cost drivers
Steelwork and glazing can significantly affect budgets
Delays in material supply can impact timelines
Renovations
Older properties may hide unexpected issues
Structural alterations often require additional materials and labour
Specification changes mid-build can increase final costs
New Builds
Foundations, structure and compliance costs continue to rise
Early budgeting and design clarity are critical
Should You Delay or Build Now?
In many cases, delaying a project can cost more long-term. While no one can predict prices perfectly, construction costs have generally trended upwards rather than down.
Starting sooner allows you to:
✅ lock in a scope of work
✅ plan finances more accurately
✅ avoid future price rises
✅ secure a reliable build slot
How to Control Your Build Budget
Here’s how homeowners can reduce risk:
1) Finalise design early
Changes during construction are one of the biggest causes of cost increases.
2) Get a detailed quotation
A clear quote should explain what’s included, what’s excluded, and how variations are handled.
3) Allow a contingency
We typically recommend 5–10% contingency, especially for renovation work.
4) Work with an experienced contractor
Good planning and communication save money in the long run.
FAQs: Construction Costs
Will construction costs come down?
There may be short-term fluctuations, but long-term trends suggest steady increases rather than reductions.
Can I fix the price of my build?
A clearly defined scope allows pricing to be agreed more accurately. Any changes should always be discussed before work proceeds.
Do you provide cost advice before starting?
Yes — we provide honest guidance during site visits so clients can plan realistically before committing.
If you’re considering an extension, renovation or new build in Cardiff or South Wales, speak to Mark James Building Contractors Ltd for clear advice and a free site visit and quotation.