Find

Extensions / Conversions in West Midlands (37)

Search results

Describe your job

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

  • Trandz Builder Ltd Logo

    Trandz Builder Ltd

    10.00

    (16 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Sustainable Construction
    Wall Tie Replacements
    Cladding
    Call
  • SS Construction Service Logo

    SS Construction Service

    8.73

    (11 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Diamond Drilling
    Period Property Restoration
    Brick / Concrete Structural Repairs
    Call
  • Jerrams Roofing and Building Ltd Logo

    Jerrams Roofing and Building Ltd

    9.95

    (33 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Refurbishments
    Demolition
    Steel Fabrication
    Call
  • Services & skills
    Builder
    Extensions / Conversions
    Equestrian Stable
    General Building
    Garden Studios
    Call
  • ZS Renovations & Gardening Services Logo

    ZS Renovations & Gardening Services

    9.93

    (19 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Emergency Builder Service
    Garage Conversions
    Call
  • J P Brazier Design & Build Ltd

    9.63

    (48 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Suspended Ceilings
    Basement / Cellar Conversions
    Call
  • SB building services (redditch) ltd Logo

    SB building services (redditch) ltd

    9.81

    (7 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Concrete Garages
    Refurbishments
    Period Property Restoration
    Call
  • Olympia trade Ltd Logo

    Olympia trade Ltd

    10.00

    (76 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    General Building
    Concreting
    Workshop Design / Construction
    Call
  • J S Construction Logo

    J S Construction

    10.00

    (57 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Partition Walls
    Stretched Ceilings
    Steel Fabrication
    Call
  • AK @ Construction & Maintenance Ltd Logo

    AK @ Construction & Maintenance Ltd

    10.00

    (147 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Period Property Restoration
    Partition Walls
    Wall Tie Replacements
    Call
  • Hatoz Construction Ltd Logo

    Hatoz Construction Ltd

    9.84

    (50 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Partition Walls
    Demolition
    Repair and Listed Building Specialist
    Call
  • Alpha Bricklaying & Construction Ltd Logo

    Alpha Bricklaying & Construction Ltd

    8.65

    (37 reviews)

    Operates in West Midlands

    Services & skills
    Builder
    Extensions / Conversions
    Structural Steels
    Call

Conversion and extension builders in West Midlands

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

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 West Midlands

Our checked tradespeople in West Midlands 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 West Midlands: 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 West Midlands

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

Find the right extension or conversion specialist in West Midlands

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 West Midlands?

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