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Extensions / Conversions in Stone (112)

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  • CATTEST - Sherrington's Mews Limited Logo

    CATTEST - Sherrington's Mews Limited

    10.00

    (4 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Refurbishments
    Agricultural Building
    Wall Tie Replacements
    Call
  • London Interiors & Maintenance Limited Logo

    London Interiors & Maintenance Limited

    9.67

    (56 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Workshop Design / Construction
    Foundations
    Loft Conversions
    Call
  • Hathor Construction Limited Logo

    Hathor Construction Limited

    9.76

    (14 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    General Building
    Loft Conversions
    Refurbishments
    Call
  • New Eltham Construction & Building - NECB Logo

    New Eltham Construction & Building - NECB

    9.96

    (23 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Structural Steels
    Fire and Flood Renovation
    General Building
    Call
  • Can Do For You Limited Logo

    Can Do For You Limited

    9.67

    (17 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Loft Conversions
    Fire and Flood Renovation
    Garden Studios
    Call
  • Reily Construction Ltd Logo

    Reily Construction Ltd

    10.00

    (38 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Agricultural Building
    Workshop Design / Construction
    Call
  • EZ Construction Logo

    EZ Construction

    10.00

    (2 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Core Drilling
    Agricultural Building
    Heritage Property Specialist
    Call
  • B Construction Logo

    B Construction

    9.79

    (11 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Fire and Flood Renovation
    Partition Walls
    Basement / Cellar Conversions
    Call
  • Hennessey Services Logo

    Hennessey Services

    9.71

    (8 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Foundations
    Car Ports
    Period Property Restoration
    Call
  • Prestige construction Logo

    Prestige construction

    10.00

    (3 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Cladding
    Car Ports
    Brick / Concrete Structural Repairs
    Call
  • Wellhall Construction Ltd Logo

    Wellhall Construction Ltd

    9.28

    (9 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Repair and Listed Building Specialist
    Concrete Garages
    Loft Conversions
    Call
  • RJR Building Contractors Limited Logo

    RJR Building Contractors Limited

    9.96

    (97 reviews)

    Operates in Stone

    Services & skills
    Builder
    Extensions / Conversions
    Fire and Flood Renovation
    Concreting
    General Building
    Call

Conversion and extension builders in Stone

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

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 Stone

Our checked tradespeople in Stone 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

Costs to expect

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

Single - storey extensions: £21,000 - £65,000

Double - storey extensions: £55,000 - £95,000

Loft conversions: £35,000 - £65,000

Garage conversions: £8,000 - £20,000

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 Stone: 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 Stone

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

Find the right extension or conversion specialist in Stone

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

Looking for more tradespeople in Stone?

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