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Basement / Cellar Conversions in Hemel (64)

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  • Garratt's Damp & Timber Limited Logo

    Garratt's Damp & Timber Limited

    (165 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Call
  • H&K Construction Logo

    H&K Construction

    8.93

    (19 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Foundations
    Garage Conversions
    Workshop Design / Construction
    Call
  • 4 Dimension Kitchens & Bathrooms Logo

    4 Dimension Kitchens & Bathrooms

    9.34

    (34 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Refurbishments
    Cladding
    Concreting
    Call
  • Tamasi LTD Logo

    Tamasi LTD

    9.93

    (10 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Car Ports
    Garage Conversions
    Structural Steels
    Call
  • Design seed developments Logo

    Design seed developments

    9.92

    (29 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Extensions / Conversions
    Concrete Garages
    Loft Conversions
    Call
  • Highgate Building Company Ltd Logo

    Highgate Building Company Ltd

    (14 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Core Drilling
    Wall Tie Replacements
    Period Property Restoration
    Call
  • Alfa Quality Construction Ltd Logo

    Alfa Quality Construction Ltd

    9.90

    (27 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Extensions / Conversions
    Refurbishments
    Garden Studios
    Call
  • HS Construction Services Ltd Logo

    HS Construction Services Ltd

    9.84

    (70 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    New Builds
    Foundations
    Refurbishments
    Call
  • I & E Builders Ltd Logo

    I & E Builders Ltd

    8.67

    (57 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Refurbishments
    Demolition
    Green Oak Framing
    Call
  • Liv Construction LTD Logo

    Liv Construction LTD

    9.89

    (68 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Partition Walls
    Demolition
    Foundations
    Call
  • Poole Property Services Ltd Logo

    Poole Property Services Ltd

    10.00

    (89 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Partition Walls
    General Building
    Garage Conversions
    Call
  • Minolamaj Construction Ltd Logo

    Minolamaj Construction Ltd

    9.90

    (7 reviews)

    Operates in Hemel Hempstead

    Services & skills
    Builder
    Basement / Cellar Conversions
    Wall Tie Replacements
    Cladding
    Sustainable Construction
    Call

Find Companies for Basement and Cellar Conversions in Hemel Hempstead

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 Hemel Hempstead 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 Hemel Hempstead

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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 Hemel Hempstead?

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