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Basement Conversions in Bournemouth (99)

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  • Chambers Building Services Logo

    Chambers Building Services

    9.93

    (92 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Concreting
    Garage Conversions
    Loft Conversions
    Call
  • Pipe Dreams Services Ltd Logo

    Pipe Dreams Services Ltd

    9.86

    (415 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Foundations
    Refurbishments
    Garage Conversions
    Call
  • SDM Builders Ltd Logo

    SDM Builders Ltd

    9.38

    (62 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Workshop Design / Construction
    Steel Fabrication
    Brick / Concrete Structural Repairs
    Call
  • SW PROPERTY CARE LTD Logo

    SW PROPERTY CARE LTD

    9.91

    (126 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Demolition
    Steel Fabrication
    Refurbishments
    Call
  • DC Construction and Groundworks Logo

    DC Construction and Groundworks

    10.00

    (27 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Structural Steels
    Heritage Property Specialist
    Period Property Restoration
    Call
  • HAL Construction Limited Logo

    HAL Construction Limited

    9.73

    (5 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Brick / Concrete Structural Repairs
    Car Ports
    Call
  • AJ Vincent Loft Conversions Logo

    AJ Vincent Loft Conversions

    9.94

    (110 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    General Building
    Partition Walls
    Loft Conversions
    Call
  • Elmer Building Services Limited Logo

    Elmer Building Services Limited

    10.00

    (241 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    General Building
    Foundations
    Demolition
    Call
  • B A Clark & Son

    9.85

    (132 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Car Ports
    Concreting
    Garden Studios
    Call
  • Sublime Developments Ltd Logo

    Sublime Developments Ltd

    9.17

    (54 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Structural Steels
    Loft Conversions
    Green Oak Framing
    Call
  • UTB CONSTRUCTION LTD

    (0 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Fire and Flood Renovation
    Car Ports
    Concrete Garages
    Call
  • HD Kitchens & Developments Logo

    HD Kitchens & Developments

    9.96

    (102 reviews)

    Operates in Bournemouth

    Services & skills
    Builder
    Extensions / Conversions
    Period Property Restoration
    Building Merchants
    Garden Studios
    Call

Conversion and extension builders in Bournemouth

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

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 Bournemouth

Our checked tradespeople in Bournemouth 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 Bournemouth

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 Bournemouth: 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 Bournemouth

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

Find the right extension or conversion specialist in Bournemouth

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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