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Basement Conversions in Grange Over Sands (5)

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  • Gregory Building & Electrical Services Logo

    Gregory Building & Electrical Services

    9.93

    (21 reviews)

    Operates in Grange-over-Sands

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Fire and Flood Renovation
    Refurbishments
    Call
  • RJM Spraying Services & Building Logo

    RJM Spraying Services & Building

    (7 reviews)

    Operates in Grange-over-Sands

    Services & skills
    Builder
    Extensions / Conversions
    Core Drilling
    Equestrian Stable
    Concrete Garages
    Call
  • S Thompson Ltd Logo

    S Thompson Ltd

    9.86

    (134 reviews)

    Operates in Grange-over-Sands

    Services & skills
    Builder
    Extensions / Conversions
    Refurbishments
    Suspended Ceilings
    Foundations
    Call
  • KA Metcalfe Building Ltd Logo

    KA Metcalfe Building Ltd

    9.85

    (40 reviews)

    Operates in Grange-over-Sands

    Services & skills
    Builder
    Extensions / Conversions
    Heritage Property Specialist
    General Building
    Cladding
    Call
  • Orwin Construction Ltd Logo

    Orwin Construction Ltd

    10.00

    (3 reviews)

    Operates in Grange-over-Sands

    Services & skills
    Builder
    Extensions / Conversions
    Insurance Claim Specialist
    Brick / Concrete Structural Repairs
    Project Management
    Call

Conversion and extension builders in Grange-over-sands

Planning a loft conversion, garage makeover or full house extension in Grange-over-sands? 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 Grange-over-sands

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 Grange-over-sands

Our checked tradespeople in Grange-over-sands 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 Grange-over-sands: 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 Grange-over-sands

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 Grange-over-sands? Enter your postcode or post a job to find emergency services in your area.

Find the right extension or conversion specialist in Grange-over-sands

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 Grange-over-Sands?

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