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Basement Conversions in GU31 (105)

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  • Buildtonic Ltd Logo

    Buildtonic Ltd

    10.00

    (13 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Basement / Cellar Conversions
    Period Property Restoration
    Call
  • Services & skills
    Builder
    Extensions / Conversions
    Wall Tie Replacements
    Brick / Concrete Structural Repairs
    Period Property Restoration
    Call
  • Classic Construction Logo

    Classic Construction

    10.00

    (93 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Partition Walls
    Structural Steels
    Workshop Design / Construction
    Call
  • JPR Builders & Son Logo

    JPR Builders & Son

    10.00

    (90 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Fire and Flood Renovation
    New Builds
    Brick / Concrete Structural Repairs
    Call
  • Hughes Home Developments Logo

    Hughes Home Developments

    8.40

    (21 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Brick / Concrete Structural Repairs
    Foundations
    Call
  • Gs Carpentry Ltd Logo

    Gs Carpentry Ltd

    (9 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Equestrian Stable
    General Building
    Heritage Property Specialist
    Call
  • Trevor C Marchant Plastering Services

    9.98

    (113 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Period Property Restoration
    New Builds
    Car Ports
    Call
  • P Harvey Construction Ltd

    9.90

    (153 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Agricultural Building
    Refurbishments
    Cladding
    Call
  • Jenkins Construction Logo

    Jenkins Construction

    10.00

    (139 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Foundations
    Demolition
    Emergency Builder Service
    Call
  • Housewright Carpentry Logo

    Housewright Carpentry

    9.96

    (9 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Car Ports
    Demolition
    Partition Walls
    Call
  • CONMAX HOME MAINTENANCE & IMPROVEMENTS Logo

    CONMAX HOME MAINTENANCE & IMPROVEMENTS

    10.00

    (27 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Sustainable Construction
    General Building
    Demolition
    Call
  • PPM Property Services Logo

    PPM Property Services

    8.72

    (17 reviews)

    Operates in GU31

    Services & skills
    Builder
    Extensions / Conversions
    Project Management
    Fire and Flood Renovation
    Foundations
    Call

Conversion and extension builders in GU31

Planning a loft conversion, garage makeover or full house extension in GU31? You’re in the right place. Whether you’re adding space for a growing family, upgrading your layout or increasing your home’s value, we can help you find the right tradesperson for the job.

Find extension and conversion builders in GU31

Every builder on Checkatrade passes up to 12 checks before they appear in your search. You can read verified reviews, compare services, and even post your job to get quotes straight to your inbox, all in a few clicks. That’s how we help homeowners like you get a job done right.

What to expect from hiring an extension or conversion builder in GU31

Our checked tradespeople in GU31 cover a wide range of projects, including:

  • Single or double-storey house extensions

  • Kitchen and diner extensions

  • Loft, attic, garage or basement conversions

  • Garden room extensions

  • Utility room extensions

  • Over-garage extensions and side returns

Extension and conversion build costs in GU31

Costs of extensions and conversions vary depending on size, structure and spec, but here's a rough guide:

Extensions:

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Loft conversions:

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Garage conversions:

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Conservatory roof conversions:

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Need help calculating costs? Use our Job Value Estimator Tool for a bespoke cost estimate.

What to check before you hire:

  • Are drawings or planning permissions needed?
  • Are they familiar with building regs?
  • Is the quote fixed or flexible?
  • Does it cover materials and project management?

Most builders will include prep, construction, electrics, plumbing and final finishes in their quote, but always double-check. Timelines range from a few weeks for simple jobs to several months for bigger builds.

Extension and conversion builders in GU31: Homeowners vs renters

Homeowners:

You’re in charge of the project. That means hiring the builder, securing permissions, and paying for the work. You may need:

  • Planning permission (especially for double-storey builds or changes near boundaries)

  • Drawings from an architect or structural engineer

  • Building regs approval

If you’re not sure where to start, speak to a local builder or post your job to get help with the process.

Renters:

You’ll usually need your landlord’s approval to make any big changes. In most cases, your landlord will be the one arranging and paying for structural changes like loft conversions or extensions. That said, it’s worth flagging ideas if you think they’ll improve the property, especially if it means longer tenancies or fewer repairs.

Emergency extension or conversion help in GU31

Extensions and conversions are big projects, but sometimes, things go wrong and need sorting fast. Common urgent issues include:

  • Leaks in newly converted lofts

  • Structural cracks or shifting

  • Faulty electrics or plumbing in newly added rooms

  • Incomplete work by previous builders

Facing an emergency in GU31? Enter your postcode or post a job to find emergency services in your area.

Find the right extension or conversion specialist in GU31

Looking for a builder to help with:

  • Rear house extensions
  • Kitchen extensions
  • Garage conversions
  • Loft or attic conversions
  • Garden room builds
  • Basement or cellar conversions
  • Conservatory roof upgrades
  • Utility or porch extensions

Start your search now


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