Extensions / Conversions in Basingstoke And Deane (90)

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  • Sponsored
    R.e. Building & Consultancy Ltd Logo

    R.e. Building & Consultancy Ltd

    9.92

    (21 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Cladding
    Brick / Concrete Structural Repairs
    Basement / Cellar Conversions
    Call
  • Growmore Construction Uk Ltd Logo

    Growmore Construction Uk Ltd

    10.00

    (12 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Garden Studios
    Refurbishments
    Basement / Cellar Conversions
    Call
  • TP Developments Logo

    TP Developments

    9.96

    (9 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Fire and Flood Renovation
    Suspended Ceilings
    New Builds
    Call
  • Field & Field Quality Building Services Ltd Logo

    Field & Field Quality Building Services Ltd

    10.00

    (224 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Structural Steels
    Refurbishments
    Steel Fabrication
    Call
  • Hamesy Plastering Building Logo

    Hamesy Plastering Building

    10.00

    (37 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Concrete Garages
    Cladding
    Workshop Design / Construction
    Call
  • Evans Building and Construction Logo

    Evans Building and Construction

    10.00

    (8 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Property Maintenance / Repair
    Brick / Concrete Structural Repairs
    Call
  • Selwood Projects Ltd Logo

    Selwood Projects Ltd

    10.00

    (7 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Sustainable Construction
    Partition Walls
    Brick / Concrete Structural Repairs
    Call
  • Carswells construction /Plumbing Logo

    Carswells construction /Plumbing

    9.92

    (76 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Wall Tie Replacements
    Partition Walls
    Structural Steels
    Call
  • Bluefinch Building Services Ltd Logo

    Bluefinch Building Services Ltd

    9.85

    (16 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Refurbishments
    Steel Fabrication
    Call
  • FRC Roofing and Property Maintenance Logo

    FRC Roofing and Property Maintenance

    9.71

    (254 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Car Ports
    Garden Studios
    Emergency Builder Service
    Call
  • INDUS VALLEY BUILDERS LTD Logo

    INDUS VALLEY BUILDERS LTD

    9.78

    (20 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    General Building
    Concrete Garages
    Call
  • R.e. Building & Consultancy Ltd Logo

    R.e. Building & Consultancy Ltd

    9.92

    (21 reviews)

    Operates in Basingstoke And Deane

    Services & skills
    Builder
    Extensions / Conversions
    Concreting
    Emergency Builder Service
    Foundations
    Call

Top rated Extensions / Conversions in Basingstoke And Deane

10

/10

90 ratings

Our Extensions / Conversions in Basingstoke And Deane are rated an average of 10 out of 10 based on a sample of 90 reviews from customers like you*

*This review aggregate is based on real customer reviews from a randomly selected postcode in this area

Conversion and extension builders in Basingstoke And Deane

Planning a loft conversion, garage makeover or full house extension in Basingstoke And Deane? 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 Basingstoke And Deane

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 Basingstoke And Deane

Our checked tradespeople in Basingstoke And Deane 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 Basingstoke And Deane

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

Extensions:

£32709 on average, with prices typically starting at £20085 up to £52106.

Loft conversions:

£35928 on average, with prices typically starting at £23495 up to £54370.

Garage conversions:

£11307 on average, with prices typically starting at £7931 up to £16168.

Conservatory roof conversions:

£8088 on average, with prices typically starting at £5783 up to £11360.

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 Basingstoke And Deane: 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 Basingstoke And Deane

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 Basingstoke And Deane? Enter your postcode or post a job to find emergency services in your area.

Find the right extension or conversion specialist in Basingstoke And Deane

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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