Builders in Cardiff
Planning an extension, loft conversion, or full renovation? GuildGauge connects you with vetted builders across Cardiff who can scope the job properly and deliver on time.
Compare 5 rated builders serving Cardiff and the Wales area. Average rating 4.8★ across 172 reviews.
Top-rated builders near Cardiff
- 1
Rise Construction Cardiff Ltd
5.0(21 reviews)Unit 8A Mill Farm Industrial Est, Cardiff CF14 0SH
Accuracy - 2
MCS Construction & Developments
5.0(19 reviews)46 Major Rd, Cardiff CF5 1PF
Accuracy - 3
RGB Construction Ltd
4.7(73 reviews)11 Watchet Cl, Llanrumney, Cardiff CF3 4DU
Accuracy - 4
FORTY BUILDERS LTD
4.7(32 reviews)12 Celyn Grove, Cardiff CF23 6SH
Accuracy - 5
AJ Construction (Cardiff) Ltd
4.7(27 reviews)40A Richards St, Cardiff CF24 4DA
Accuracy
Common builder jobs in Cardiff
- Home extensions
- Loft conversions
- Structural alterations and internal wall removal
- Full renovations and refurbishments
- Garage conversions
- Groundworks and foundations
Typical costs
| Small extension (single storey) | £15,000-£35,000 |
| Loft conversion | £20,000-£45,000 |
| Internal wall removal (non-structural) | £400-£1,200 |
| Full home renovation | £15,000-£60,000+ |
| Garage conversion | £8,000-£20,000 |
Prices vary depending on the time of day, job complexity, and whether it's an emergency call-out. Always ask for a quote before work begins.
What to check before hiring a builder
- Are they registered with a body such as the Federation of Master Builders?
- Will the job need Building Regulations approval or planning permission, and will they handle this?
- Do they provide a detailed written quote with a payment schedule?
- Do they carry public liability insurance?
- Can they provide references or photos from similar local projects?
Frequently asked questions about hiring a builder in Cardiff
Do I need planning permission for an extension?
Many extensions fall under Permitted Development rights, but larger projects or those in conservation areas may need planning permission. Your builder should be able to advise.
How long does a loft conversion take in Cardiff?
Most loft conversions take 6-8 weeks, though this varies depending on the scope and any structural work required.
Should I get multiple quotes before hiring a builder?
Yes, it's standard practice to compare at least two or three quotes for any significant building project.
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