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Extensions / Conversions in New Mills (32)

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  • Sponsored
    Sula Carpentry Work Logo

    Sula Carpentry Work

    9.78

    (63 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Loft Conversions
    Repair and Listed Building Specialist
    Concreting
    Call
  • Sula Carpentry Work Logo

    Sula Carpentry Work

    9.78

    (63 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Car Ports
    Concreting
    Garden Studios
    Call
  • Cheshire Extensions & Conversions Logo

    Cheshire Extensions & Conversions

    10.00

    (18 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Repair and Listed Building Specialist
    Concreting
    Basement / Cellar Conversions
    Call
  • Cheshire Design And Build Nw Ltd Logo

    Cheshire Design And Build Nw Ltd

    9.90

    (60 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Demolition
    Brick / Concrete Structural Repairs
    Cladding
    Call
  • XCELTEC Limited Logo

    XCELTEC Limited

    9.76

    (13 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Demolition
    Garage Conversions
    Workshop Design / Construction
    Call
  • Pinnacle Builders Logo

    Pinnacle Builders

    9.90

    (23 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Garage Conversions
    Suspended Ceilings
    Call
  • JR Construction NW Logo

    JR Construction NW

    10.00

    (45 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Partition Walls
    Project Management
    Call
  • Olympus Property Development Ltd Logo

    Olympus Property Development Ltd

    10.00

    (3 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Garden Studios
    Loft Conversions
    Refurbishments
    Call
  • BNR Build Ltd Logo

    BNR Build Ltd

    9.67

    (5 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Mastic Sealant
    Refurbishments
    Garden Studios
    Call
  • Lionsgate Home Renovations Logo

    Lionsgate Home Renovations

    9.67

    (26 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    Loft Conversions
    Basement / Cellar Conversions
    Garage Conversions
    Call
  • GREENFOX BUILDING SERVICES LTD Logo

    GREENFOX BUILDING SERVICES LTD

    9.50

    (55 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Refurbishments
    Basement / Cellar Conversions
    Call
  • Whitehall Builders Ltd Logo

    Whitehall Builders Ltd

    10.00

    (45 reviews)

    Operates in New Mills

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Suspended Ceilings
    Property Maintenance / Repair
    Call

Conversion and extension builders in New Mills

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

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 New Mills

Our checked tradespeople in New Mills 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 New Mills

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 New Mills: 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 New Mills

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

Find the right extension or conversion specialist in New Mills

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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