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Extensions / Conversions in Plumstead (184)

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  • J & B Builders & Plumbing Services Logo

    J & B Builders & Plumbing Services

    9.93

    (32 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Loft Conversions
    Building Merchants
    Demolition
    Call
  • Dhaliwal22 Construction Ltd Logo

    Dhaliwal22 Construction Ltd

    9.78

    (27 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Stretched Ceilings
    Structural Design
    Sustainable Construction
    Call
  • Hayward Developments (London) Ltd Logo

    Hayward Developments (London) Ltd

    10.00

    (66 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Brick / Concrete Structural Repairs
    Mastic Sealant
    Core Drilling
    Call
  • Lee Building Contractors Limited Logo

    Lee Building Contractors Limited

    10.00

    (68 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Refurbishments
    General Building
    Fire and Flood Renovation
    Call
  • IMAAR CONSTRUCTION LTD Logo

    IMAAR CONSTRUCTION LTD

    (0 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Wall Tie Replacements
    Cladding
    Call
  • Make Room Loft Conversions Ltd Logo

    Make Room Loft Conversions Ltd

    10.00

    (59 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Demolition
    Garden Studios
    Call
  • Neofix Development Ltd Logo

    Neofix Development Ltd

    9.89

    (23 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Suspended Ceilings
    Foundations
    Garage Conversions
    Call
  • Biowise Maintenance Limited Logo

    Biowise Maintenance Limited

    9.22

    (33 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Loft Conversions
    Brick / Concrete Structural Repairs
    Call
  • JMPM LTD Logo

    JMPM LTD

    9.67

    (88 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Basement / Cellar Conversions
    Structural Design
    Workshop Design / Construction
    Call
  • Cliffords Home Improvements Ltd Logo

    Cliffords Home Improvements Ltd

    8.78

    (33 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Emergency Builder Service
    Insurance Claim Specialist
    Refurbishments
    Call
  • Migss Tiles & Luxury Interiors Ltd Logo

    Migss Tiles & Luxury Interiors Ltd

    9.98

    (19 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    Project Management
    General Building
    Suspended Ceilings
    Call
  • SUPERIOR ESTATES & BUILDERS LTD Logo

    SUPERIOR ESTATES & BUILDERS LTD

    9.78

    (36 reviews)

    Operates in Plumstead

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Foundations
    Car Ports
    Call

Conversion and extension builders in Plumstead

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

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 Plumstead

Our checked tradespeople in Plumstead 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 Plumstead

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 Plumstead: 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 Plumstead

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

Find the right extension or conversion specialist in Plumstead

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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