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Basement / Cellar Conversions in West Glamorgan (10)

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  • R+R Carpentry And Building Services Swansea Logo

    R+R Carpentry And Building Services Swansea

    9.22

    (21 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Brick / Concrete Structural Repairs
    Property Maintenance / Repair
    Concrete Garages
    Call
  • Lds Building Group Ltd Logo

    Lds Building Group Ltd

    10.00

    (18 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Foundations
    Suspended Ceilings
    Agricultural Building
    Call
  • BUDGET BUILDERS 2 LTD

    (0 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Garage Conversions
    Cladding
    Car Ports
    Call
  • AB Property Maintenance Logo

    AB Property Maintenance

    9.99

    (42 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Period Property Restoration
    Mastic Sealant
    General Building
    Call
  • Tedex Carpentry Ltd Logo

    Tedex Carpentry Ltd

    9.83

    (42 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Loft Conversions
    Property Maintenance / Repair
    Green Oak Framing
    Call
  • NPT CONSTRUCTION LTD Logo

    NPT CONSTRUCTION LTD

    10.00

    (8 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Refurbishments
    Agricultural Building
    Sustainable Construction
    Call
  • JS Ridley Kitchens, Bathrooms and Building Services Logo

    JS Ridley Kitchens, Bathrooms and Building Services

    (4 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Concreting
    Core Drilling
    General Building
    Call
  • MM Building and Construction working with MIKEL renovations Logo

    MM Building and Construction working with MIKEL renovations

    10.00

    (33 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Sustainable Construction
    Brick / Concrete Structural Repairs
    Workshop Design / Construction
    Call
  • J M Curtis & Sons Building Company LTD Logo

    J M Curtis & Sons Building Company LTD

    (0 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Workshop Design / Construction
    Fire and Flood Renovation
    Mastic Sealant
    Call
  • R.a.l.d Construction Ltd Logo

    R.a.l.d Construction Ltd

    10.00

    (9 reviews)

    Operates in West Glamorgan

    Services & skills
    Builder
    Basement / Cellar Conversions
    Garage Conversions
    General Building
    Agricultural Building
    Call

Find Companies for Basement and Cellar Conversions in West Glamorgan

Dreaming of converting your cellar or basement into a home office, cinema room, or guest bedroom, but unsure about who to hire and how much it will cost?

Checkatrade can help.

Keep reading for everything you need to know about basement and cellar conversions in West Glamorgan and how to hire a checked and reviewed tradesperson for the job.

Want to jump straight into it? Try our quick request a quote feature and we’ll put you in touch with experienced basement conversion companies covering your local area.

Average cellar conversion costs in West Glamorgan

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Looking for basement excavation prices? Our cost guide to building a basement has all the details.

Top tip: You can also try out our job estimate calculator to get a steer idea on costs for your project.

Do I need planning permission to convert a cellar?

Most cellar conversions don’t need planning permission if you’re converting an existing space.

However, if you’re excavating deeper, changing the external appearance, or creating a new entrance, you’ll likely need permission and Building Regulations approval.

Contact your local authorities as a first port of call.

Is a cellar conversion worth it?

Yes – converting a cellar can add valuable living space and increase the property value. It’s also a great option for homeowners in areas where extending upward or outward isn’t possible.

Basements and cellars are legal in the UK, but the work must comply with UK Building Regulations.

This ensures the conversion meets industry-standard requirements for damp proofing, ventilation, fire safety, and structural safety.

Can you convert a cellar into a bedroom?

Yes - with the right planning and building work, you can convert a cellar into a bedroom, guest suite, or even a self-contained studio.

To meet building regulations, your cellar bedroom will need:

  • Proper ventilation and insulation
  • A safe fire escape route
  • Adequate ceiling height and natural light
  • In some cases, planning permission

These checks aren’t just for comfort - they’re essential if you ever decide to sell your home. A compliant conversion can add value and avoid issues during surveys or legal checks.

Why use Checkatrade?

  • Fully checked contractors covering your local area
  • Insurance always listed
  • Easy to compare multiple profiles
  • Handy reviews from local customers
  • Covered by the Checkatrade Guarantee (T&Cs apply)

Looking for more tradespeople in West Glamorgan?

Find Checkatrade reviewed Tradespeople, get a quote today, discover related services in West Glamorgan and check out our latest home improvement guides.