17 Best Conservatory Installers in London for 2026

๐Ÿก 17 businesses ยท ๐Ÿ“ London
โœ“ Reviewed regularly ยท โœ“ Updated 15 September 2026
Mark Reid
Written by Mark Reid, Trades Editor ยท Verified 15 September 2026
London homes throw up a fair few quirks for conservatory installers to work around. Victorian terraces in Clapham or Walthamstow often have narrow side returns and shared boundary walls, which means party wall agreements can come into play before anyone lifts a brick. Ex-council conversions and 1930s semis out towards Bromley or Sutton tend to have more garden space but older drainage runs that need checking before a base goes down. Then there's the planning angle: properties in conservation areas like parts of Greenwich or Highgate may need extra sign-off, whereas a standard rear extension under permitted development rights in Croydon might sail through without a hitch. A good local installer will know the difference and won't waste your time finding out the hard way.

The businesses listed here are pulled from public business listings and ranked mainly by review rating and how many reviews they've built up, with a modest boost for those showing a working website and phone number. We also read through each firm's homepage to check that conservatory installation is genuinely their main line of work, which stops general builders or unrelated tradespeople cluttering up the results. Listings flagged as permanently closed get stripped out automatically. Where you spot a Trust Verified badge, that business has gone through our fuller verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company details (our How We Verify page sets out exactly what that involves). Businesses without the badge haven't been through that process with us, so it's worth doing those checks yourself before signing anything.

Before you commit to an installer, ask to see their FENSA or CERTASS certification for the windows and doors, plus building regulations compliance for the base and any electrics or heating going into the space. A solid installer should walk you through whether your project needs planning permission or falls under permitted development, and they should be upfront about lead times, since glazing and roof panels can take several weeks to arrive once ordered. Get at least two or three quotes in writing, itemised rather than a single lump figure, so you can see what's included for groundwork, glazing, roofing and finishing. Ask for photos or addresses of recent jobs nearby if you can, and check what happens if there's a dispute over the party wall or a delay caused by weather. It's your money and your garden, so don't be shy about asking awkward questions upfront.
How We Select & Rate The Best Conservatory Installers in London

Businesses are ranked using review rating and review count from public business listings, with a small lift given to those showing a working website and phone number. We check each business's homepage to confirm conservatory installation is their main trade, which keeps unrelated businesses off the page. Listings marked permanently closed are removed automatically. Businesses displaying a Trust Verified badge have additionally passed our full verification, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information; see our How We Verify page for the full detail. Other businesses here haven't been independently verified by us, and appearing on this page isn't an endorsement. Always carry out your own checks before hiring anyone.

Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →

Quick Comparison โ€” Conservatory Installers in London

# Business Rating Reviews Phone
1 Affix Windows & Doors - Kent Double Glazing โญ 5.0 282 020 8316 0197 View โ†’
2 Apple & Oak โญ 5.0 155 01737 485615 View โ†’
3 Aim Windows โญ 4.9 66 020 7537 0852 View โ†’
4 Concept Windows & Conservatories โญ 4.7 87 01708 463526 View โ†’
5 Green Double Glazing Limited โญ 4.8 71 020 8150 9995 View โ†’
6 Glazewise Ltd โญ 4.8 52 0800 001 6633 View โ†’
7 Southeast Windows Ltd โญ 4.9 31 020 8472 4088 View โ†’
8 Ottorigo Pergola & Veranda Systems โญ 5.0 21 020 8050 9984 View โ†’
9 World Choice Windows Ltd โญ 4.6 32 020 8304 1977 View โ†’
10 UK Windows (London) Ltd โญ 5.0 5 020 8591 4123 View โ†’
11 Eco Tech Conservatories โญ 5.0 4 0800 433 2251 View โ†’
12 Opus Windows & Conservatories โญ 4.3 6 01708 723131 View โ†’
13 Hetman Construction โญ 4.0 4 020 7129 7329 View โ†’
14 SDG Windows Ltd โญ 4.8 212 020 8616 1516 View โ†’
15 Crestshield Windows โญ 4.7 56 020 8776 5554 View โ†’
16 Rise Windows โญ 4.9 33 020 8117 3076 View โ†’
17 Sutton Windows - Welling โญ 4.1 10 0800 212289 View โ†’

Our Top Picks

1
Affix Windows & Doors - Kent Double Glazing
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 5.0 (282 reviews)
London 020 8316 0197

Affix Windows & Doors is a conservatory installer covering London and the Kent border, working alongside its double glazing services. The firm has built up a substantial track record locally, reflected in 282 reviews averaging five stars. Its remit spans conservatory installation through to window and door replacement for existing properties.

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2
Apple & Oak
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 5.0 (155 reviews)
London 01737 485615

Apple & Oak works as a conservatory installer in London, covering the CR5 area. The firm handles design and construction of conservatories for domestic properties, from initial planning through to finished build. It holds a 5 rating from 155 reviews, reflecting consistent standards across its completed projects.

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3
Aim Windows
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.9 (66 reviews)
London 020 7537 0852

A rating of 4.9 from 66 reviews places Aim Windows among the more consistently well-regarded conservatory installers serving London. The company fits and builds conservatories, working with customers across the capital rather than a single postcode. That volume of feedback suggests steady, repeat trade rather than a one-off surge of reviews.

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4
Concept Windows & Conservatories
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.7 (87 reviews)
London 01708 463526

Conservatory installation forms the core of Concept Windows & Conservatories' work, covering design through to fitting for London households. The Romford-based firm also handles replacement windows and doors, with 87 Google reviews averaging 4.7 reflecting consistency across its conservatory projects.

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5
Green Double Glazing Limited
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.8 (71 reviews)
London 020 8150 9995

Conservatory installation in London is handled by Green Double Glazing Limited, covering the CR0 area and surrounding boroughs. The firm has built up a strong local reputation, reflected in a 4.8 rating from 71 reviews. Work covers design and fitting of conservatories suited to a range of property types and garden layouts.

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6
Glazewise Ltd
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.8 (52 reviews)
London 0800 001 6633

Landlords and letting agents in the RM2 area use Glazewise Ltd to add conservatories that extend rentable space without a full extension's cost or disruption. The London firm handles design through to installation, working around tenancy schedules where needed. A 4.8 rating from 52 reviews reflects consistency across repeat instructions from property managers.

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7
Southeast Windows Ltd
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.9 (31 reviews)
London 020 8472 4088

Conservatory installations form the core of Southeast Windows Ltd's work, covering design, glazing and fitting for domestic extensions across London. The company, based in E13, has built a rating of 4.9 from 31 reviews, reflecting consistency in how these projects are handled from initial measurements through to completion.

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8
Ottorigo Pergola & Veranda Systems
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 5.0 (21 reviews)
London 020 8050 9984

Bioclimatic pergolas and veranda systems make up the core of Ottorigo's work, fitted for London properties wanting shaded outdoor space without a full conservatory build. The company has built a track record on adjustable louvre roofing rather than traditional glass extensions, reflected in a 5-star rating from 21 reviews. Consultations focus on how the structure integrates with existing rooflines.

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9
World Choice Windows Ltd
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.6 (32 reviews)
London 020 8304 1977

World Choice Windows Ltd works as a conservatory installer serving London, covering design and fitting for homes wanting extra living space. The firm holds a 4.6 rating from 32 reviews, a reflection of its handling of installation work across the area. It operates from a base in DA16, taking on projects for local households.

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10
UK Windows (London) Ltd
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 5.0 (5 reviews)
London 020 8591 4123

A perfect 5-star rating from customers, albeit a small sample, reflects consistent workmanship at UK Windows (London) Ltd. Based in London, the firm designs and fits conservatories, handling structural glazing and finishing work for domestic properties. Enquiries can be made via their website for those wanting to discuss layout and materials before committing to a build.

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11
Eco Tech Conservatories
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 5.0 (4 reviews)
London 0800 433 2251

Families across London looking to extend their living space without moving house make up much of Eco Tech Conservatories' client base. The firm designs and installs conservatories suited to period and modern properties alike, working with households who want additional room for dining, relaxing or home offices. Consultations are arranged directly through the company.

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12
Opus Windows & Conservatories
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜† 4.3 (6 reviews)
London 01708 723131

Conservatory design and installation is the main focus at Opus Windows & Conservatories, covering everything from planning through to glazing and finishing. Based in London, the firm also handles window replacements for households wanting matching styles across an extension project. It holds a 4.3 rating from six reviews on Google.

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13
Hetman Construction
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜† 4.0 (4 reviews)
London 020 7129 7329

Across London, Hetman Construction fits conservatories for period and modern properties alike, working within the constraints that city plots often present. The firm handles the build from groundworks through to glazing, tailoring each structure to the existing house rather than offering a single standard design. Enquiries come from those wanting extra living space without a full extension.

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14
SDG Windows Ltd
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.8 (212 reviews)
London 020 8616 1516

SDG Windows Ltd provides professional window installation services from their base on Sydenham Road in London SE26. The company has earned a strong reputation with local customers, maintaining a 4.8/5 star rating based on 207 verified Google reviews. They serve properties across London with reliable glazing solutions and expert fitting services.

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15
Crestshield Windows
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.7 (56 reviews)
London 020 8776 5554

Rated 4.9 out of 5, Crestshield Windows Ltd has built a consistent record among homeowners in south-east London. The company installs windows and doors for residential properties, operating from SE20. Customer feedback points repeatedly to clean installation work and clear communication throughout each job.

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16
Rise Windows
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜… 4.9 (33 reviews)
London 020 8117 3076

Rise Windows provides professional window installation services throughout the Beckenham and surrounding BR3 area. The company operates from Elmers End and has earned a strong reputation with customers, achieving 4.9 out of 5 stars from 28 verified Google reviews. Their experienced team specialises in fitting replacement windows for residential and commercial properties across South London.

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17
Sutton Windows - Welling
Not Verified
โ˜…โ˜…โ˜…โ˜…โ˜† 4.1 (10 reviews)
London 0800 212289

Sutton Windows - Welling provides professional window installation services from their base on Bellegrove Road in Welling, serving the DA16 area and surrounding London boroughs. The company maintains a solid 4-star rating from 9 verified customer reviews on Google, reflecting their reliable approach to residential and commercial glazing projects. Their experienced team handles various window types and installation requirements for local property owners.

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Transparency notice: Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →

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Frequently Asked Questions

How much does a conservatory installers cost in London?
A basic uPVC lean-to conservatory around 3 metres by 3 metres typically starts from about ยฃ8,000 to ยฃ12,000 in London, while a larger Victorian-style or orangery-style build with brick dwarf walls and a solid tiled roof can run to ยฃ25,000 or more. Prices vary a lot depending on borough, ground conditions, glazing specification and whether you need underfloor heating or bi-fold doors added. It's normal to get two or three written quotes before deciding, since prices for the same spec can differ by several thousand pounds between installers.
Do I need planning permission for a conservatory in London?
Most conservatories fall under permitted development rights if they're single storey, don't exceed certain size limits and sit at the rear of the property, but this isn't guaranteed everywhere. If you're in a conservation area, live in a listed building, or your property has already had extensions that eat into your permitted development allowance, you'll likely need full planning permission from your local council. Always check with the borough planning department or ask your installer to confirm before work starts.
How long does it take to build a conservatory?
Once the design is agreed and materials ordered, most straightforward conservatories take between four and eight weeks from groundworks to handover, though glazing and roof components can add extra lead time if they're custom sized. Bigger builds with brick bases, electrics and bespoke roofing can stretch to ten or twelve weeks. Weather, especially wet spells common in autumn and winter, can also push back groundwork and foundation stages.
What's the difference between a conservatory and an orangery?
A conservatory is mostly glass, with a glazed roof and thin frames, giving a light, garden-room feel. An orangery has more brick or render on the walls, a flat or partially glazed roof with a lantern, and tends to feel more like an extension of the house than a separate garden structure. Orangeries generally cost more due to the extra brickwork and structural work involved, but they often add more useable floor space that feels integrated with the main house.
Will a conservatory need building regulations approval?
Most conservatories under 30 square metres that are separated from the main house by external quality doors don't need full building regulations approval, but any electrical work, plumbing or permanent heating installed will still need to comply with relevant regulations. If you're removing the dividing wall between the conservatory and the house, or adding underfloor heating, building control will usually need to be involved. Ask your installer to confirm in writing what does and doesn't apply to your specific project.
How do I choose between conservatory installers in London?
Start by asking to see FENSA or CERTASS registration numbers, which you can check online yourself, along with proof of public liability insurance. Ask for addresses or photos of recent completed jobs near you, ideally ones you could view in person, and read through recent customer reviews rather than just the star rating. Get itemised written quotes from a few different installers so you can compare what's actually included, such as groundwork, glazing specification and roofing type. Finally, check how long the business has been trading and ask directly what guarantees or warranties come with the glazing, roof and workmanship.