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Extensions / Conversions in Thames Ditton (264)

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  • Zaranek's Construction Ltd Logo

    Zaranek's Construction Ltd

    9.83

    (51 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Foundations
    Refurbishments
    Insurance Claim Specialist
    Call
  • Brick And Mix Construction Logo

    Brick And Mix Construction

    9.84

    (61 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Brick / Concrete Structural Repairs
    Call
  • Dobruna Construction Limited Logo

    Dobruna Construction Limited

    10.00

    (24 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Wall Tie Replacements
    Workshop Design / Construction
    Concreting
    Call
  • Ni Building Services Ltd Logo

    Ni Building Services Ltd

    9.76

    (65 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Loft Conversions
    Refurbishments
    Call
  • Mayfair Build Ltd Logo

    Mayfair Build Ltd

    9.97

    (60 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Concrete Garages
    Car Ports
    Loft Conversions
    Call
  • Anglo-Polish Builders Ltd Logo

    Anglo-Polish Builders Ltd

    9.88

    (295 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Concreting
    Suspended Ceilings
    Demolition
    Call
  • FBS London Ltd Logo

    FBS London Ltd

    10.00

    (112 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Foundations
    Loft Conversions
    Call
  • CWB Logo

    CWB

    9.97

    (20 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Car Ports
    Emergency Builder Service
    Partition Walls
    Call
  • OMNI Property Solutions Logo

    OMNI Property Solutions

    9.89

    (97 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Loft Conversions
    Garden Studios
    Call
  • Denham Crescent Developments Ltd Logo

    Denham Crescent Developments Ltd

    9.33

    (15 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Refurbishments
    Project Management
    Loft Conversions
    Call
  • GENERAL BUILDING Logo

    GENERAL BUILDING

    9.88

    (32 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Garden Studios
    Refurbishments
    Call
  • Nexgen Builders Limited Logo

    Nexgen Builders Limited

    9.47

    (7 reviews)

    Operates in Thames Ditton

    Services & skills
    Builder
    Extensions / Conversions
    Concrete Garages
    New Builds
    Project Management
    Call

Conversion and extension builders in Thames Ditton

Planning a loft conversion, garage makeover or full house extension in Thames Ditton? 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 Thames Ditton

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 Thames Ditton

Our checked tradespeople in Thames Ditton 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 Thames Ditton

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 Thames Ditton: 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 Thames Ditton

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 Thames Ditton? Enter your postcode or post a job to find emergency services in your area.

Find the right extension or conversion specialist in Thames Ditton

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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