Find

Extensions / Conversions in Staines Upon Thames (236)

Search results

Describe your job

Give us the details of your job and we'll send it to specialist trades for you

Priced services

Get your job done faster by booking it in

  • Gomm Developments Logo

    Gomm Developments

    10.00

    (13 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Equestrian Stable
    Property Maintenance / Repair
    Concrete Garages
    Call
  • Minuu Property Services Logo

    Minuu Property Services

    (0 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Period Property Restoration
    Mastic Sealant
    Core Drilling
    Call
  • Proficient Property Services LTD Logo

    Proficient Property Services LTD

    9.98

    (21 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Demolition
    General Building
    Call
  • GENERAL BUILDING Logo

    GENERAL BUILDING

    9.87

    (28 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Brick / Concrete Structural Repairs
    Concrete Garages
    Call
  • Hasi Construction Ltd

    9.92

    (56 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Cladding
    Project Management
    Fire and Flood Renovation
    Call
  • C Stokes Building Services Logo

    C Stokes Building Services

    10.00

    (101 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Loft Conversions
    Garden Studios
    Garage Conversions
    Call
  • London Construction Partnership Logo

    London Construction Partnership

    9.87

    (12 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Fire and Flood Renovation
    Garage Conversions
    Garden Studios
    Call
  • Brickscapes Logo

    Brickscapes

    9.89

    (187 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Car Ports
    Core Drilling
    Fire and Flood Renovation
    Call
  • More Space Building Solutions Ltd

    10.00

    (10 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Demolition
    New Builds
    Partition Walls
    Call
  • K H Builder Ltd Logo

    K H Builder Ltd

    9.96

    (87 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Demolition
    Partition Walls
    Call
  • NVS Design And Build Ltd

    9.92

    (12 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Structural Design
    General Building
    Call
  • Lamadoss Design and Build Logo

    Lamadoss Design and Build

    10.00

    (221 reviews)

    Operates in Staines

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Project Management
    Structural Steels
    Call

Conversion and extension builders in Staines

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

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 Staines

Our checked tradespeople in Staines 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 Staines

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

Extensions:

[pricing[1].Staines.[House Extension Building].[averagePriceFormatted]] on average, with prices typically starting at [pricing[1].Staines.[House Extension Building].[lowPriceFormatted]] up to [pricing[1].Staines.[House Extension Building].[highPriceFormatted]].

Loft conversions:

[pricing[2].Staines.[Loft Conversion Building].[averagePriceFormatted]] on average, with prices typically starting at [pricing[2].Staines.[Loft Conversion Building].[lowPriceFormatted]] up to [pricing[2].Staines.[Loft Conversion Building].[highPriceFormatted]].

Garage conversions:

[pricing[3].Staines.[Garage Conversions Building].[averagePriceFormatted]] on average, with prices typically starting at [pricing[3].Staines.[Garage Conversions Building].[lowPriceFormatted]] up to [pricing[3].Staines.[Garage Conversions Building].[highPriceFormatted]].

Conservatory roof conversions:

[pricing[4].Staines.[Conservatory Roof Conversions].[averagePriceFormatted]] on average, with prices typically starting at [pricing[4].Staines.[Conservatory Roof Conversions].[lowPriceFormatted]] up to [pricing[4].Staines.[Conservatory Roof Conversions].[highPriceFormatted]].

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 Staines: 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 Staines

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

Find the right extension or conversion specialist in Staines

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


Looking for more tradespeople in Staines?

Find Checkatrade reviewed Tradespeople, get a quote today, discover related services in Staines and check out our latest home improvement guides.