Extensions / Conversions in Lee (214)

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    Neofix Development Ltd Logo

    Neofix Development Ltd

    9.90

    (24 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Wall Tie Replacements
    Concrete Garages
    Structural Steels
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    RCB Design & Build Contractors Logo

    RCB Design & Build Contractors

    9.92

    (114 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Loft Conversions
    Refurbishments
    Call
  • DRAGOI CONSTRUCTION LTD

    Be the first to review

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Concreting
    Loft Conversions
    Warehouse Racking
    Call
  • Baseline Build and Renovate Ltd Logo

    Baseline Build and Renovate Ltd

    9.73

    (191 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    General Building
    Garage Conversions
    Basement / Cellar Conversions
    Call
  • Piotr Bac Refurbishment Logo

    Piotr Bac Refurbishment

    9.00

    (48 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Project Management
    General Building
    Period Property Restoration
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    Equipped Building Services Logo

    Equipped Building Services

    10.00

    (114 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Garden Studios
    Period Property Restoration
    Refurbishments
    Call
  • All Seasons Roofing and Construction Ltd Logo

    All Seasons Roofing and Construction Ltd

    9.98

    (29 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    New Builds
    Concrete Garages
    Loft Conversions
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  • BDR-Home Improvement Ltd Logo

    BDR-Home Improvement Ltd

    9.33

    (23 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Brick / Concrete Structural Repairs
    Concreting
    General Building
    Call
  • RW Construction Logo

    RW Construction

    9.93

    (35 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    General Building
    Garage Conversions
    Garden Studios
    Call
  • SUPERIOR ESTATES & BUILDERS LTD Logo

    SUPERIOR ESTATES & BUILDERS LTD

    9.77

    (35 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Demolition
    Fire and Flood Renovation
    Foundations
    Call
  • Frank's builders Logo

    Frank's builders

    10.00

    (5 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Sustainable Construction
    Warehouse Racking
    Call
  • Edibuildingservice Logo

    Edibuildingservice

    9.88

    (97 reviews)

    Operates in Lee

    Services & skills
    Builder
    Extensions / Conversions
    Garage Conversions
    Building Merchants
    Foundations
    Call

Top rated Extensions / Conversions in Lee

10

/10

94 ratings

Our Extensions / Conversions in Lee are rated an average of 10 out of 10 based on a sample of 94 reviews from customers like you*

*This review aggregate is based on real customer reviews from a randomly selected postcode in this area

Conversion and extension builders in Lee

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

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 Lee

Our checked tradespeople in Lee 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 Lee

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

Extensions:

£32709 on average, with prices typically starting at £20085 up to £52106.

Loft conversions:

£35928 on average, with prices typically starting at £23495 up to £54370.

Garage conversions:

£11307 on average, with prices typically starting at £7931 up to £16168.

Conservatory roof conversions:

£8088 on average, with prices typically starting at £5783 up to £11360.

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 Lee: 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 Lee

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

Find the right extension or conversion specialist in Lee

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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