Extensions / Conversions in Southwater (101)

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  • Sponsored
    JT Builds & Specialised Carpentry Logo

    JT Builds & Specialised Carpentry

    9.93

    (14 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Insurance Claim Specialist
    Loft Conversions
    Sustainable Construction
    Call
  • C G Construction (South East) Limited Logo

    C G Construction (South East) Limited

    Be the first to review

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Agricultural Building
    Basement / Cellar Conversions
    Workshop Design / Construction
    Call
  • Burbank Construction Ltd Logo

    Burbank Construction Ltd

    9.36

    (94 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Loft Conversions
    Foundations
    Green Oak Framing
    Call
  • Prek Building Services Ltd Logo

    Prek Building Services Ltd

    10.00

    (37 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Demolition
    General Building
    Suspended Ceilings
    Call
  • Harveys Logo

    Harveys

    10.00

    (35 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Insurance Claim Specialist
    Structural Steels
    Concrete Garages
    Call
  • B H Norton & Son Limited

    10.00

    (222 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Concreting
    New Builds
    Fire and Flood Renovation
    Call
  • Crafted Conversions Ltd Logo

    Crafted Conversions Ltd

    9.75

    (8 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Project Management
    Car Ports
    New Builds
    Call
  • Coadman Contractors Logo

    Coadman Contractors

    (33 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Concreting
    General Building
    Foundations
    Call
  • FBS London Ltd Logo

    FBS London Ltd

    10.00

    (114 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Foundations
    Garage Conversions
    Loft Conversions
    Call
  • TRG Property Care Logo

    TRG Property Care

    9.75

    (160 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Insurance Claim Specialist
    Car Ports
    Garden Studios
    Call
  • Astute Sussex Building & Refurbishment Limited Logo

    Astute Sussex Building & Refurbishment Limited

    10.00

    (2 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    Loft Conversions
    Concreting
    Cladding
    Call
  • KR Property Maintenance and Construction Ltd Logo

    KR Property Maintenance and Construction Ltd

    9.93

    (9 reviews)

    Operates in Southwater

    Services & skills
    Builder
    Extensions / Conversions
    General Building
    Basement / Cellar Conversions
    Project Management
    Call

Top rated Extensions / Conversions in Southwater

10

/10

87 ratings

Our Extensions / Conversions in Southwater are rated an average of 10 out of 10 based on a sample of 87 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 Southwater

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

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 Southwater

Our checked tradespeople in Southwater 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 Southwater

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

Extensions:

£36363 on average, with prices typically starting at £21034 up to £60872.

Loft conversions:

£37346 on average, with prices typically starting at £23540 up to £58094.

Garage conversions:

£11075 on average, with prices typically starting at £7322 up to £16880.

Conservatory roof conversions:

£7981 on average, with prices typically starting at £5308 up to £11927.

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 Southwater: 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 Southwater

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

Find the right extension or conversion specialist in Southwater

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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