Best Deck Builders in London

A well-designed deck can make a London garden, roof terrace or awkward change in level far more usable. It can create a practical route from the house, provide a level dining area on sloping ground and introduce a warmer surface than paving. Poorly planned decking, however, can trap moisture, block air bricks, create difficult steps and deteriorate long before the visible boards reach the end of their expected life.

Choosing a deck builder therefore involves more than comparing photographs and board colours. The structure beneath the surface, drainage, ventilation, fixings, access, planning constraints and manufacturer's installation requirements are at least as important as the finish visible on handover day.

The seven contractors below cover several distinct parts of the market. Some are dedicated decking specialists working with timber, hardwood and branded composite systems. Others are broader landscape-design and construction businesses suited to gardens where the deck must be coordinated with paving, planting, retaining walls, lighting or a roof terrace.

The most suitable contractor will depend on the structure being built, the material selected, the location of the property and the amount of wider landscaping involved. Manufacturer-approved status can indicate familiarity with a particular product, but the written quotation should still identify the exact board, subframe, fixing system, installation warranty and route for handling any future claim.

What separates a strong decking contractor?

A capable installer should be able to discuss the parts of the deck that will remain hidden after completion. That includes foundations, posts, joist centres, ventilation, drainage, protection around the building and the way steps, balustrades and fascia details will be supported.

Useful evidence includes completed projects using comparable materials, current insurance, clear contractual details and a quotation that separates the visible boards from framing, groundworks and disposal. Trade-body or manufacturer recognition can be helpful, particularly for proprietary composite systems, but it should support rather than replace a detailed project specification.

For larger garden schemes, it is equally important to establish who is responsible for drainage design, planting, electrical work, retaining structures and any planning or freeholder approvals. A decking specialist may be ideal for a focused installation, while a landscape-design practice may be more appropriate where the deck forms one part of a complete outdoor scheme.

How much does decking cost in London?

There is no dependable single starting price for a London deck. The old claim that a standard installation begins at £800 is likely to be misleading for many professionally built projects once demolition, access, waste, foundations, framing, steps, edges and labour are included.

The cost is normally shaped by:

• The deck's area and shape
• Ground conditions and the amount of excavation
• Whether an old deck must be removed
• Access through the house or a narrow side passage
• The height and complexity of the supporting structure
• Timber, hardwood, capped composite or mineral-composite boards
• Timber, aluminium or composite subframe materials
• Steps, balustrades, fascia boards and lighting
• Drainage, waterproofing or roof-terrace requirements
• Parking, permits, skips and waste removal
• Design work, structural input and planning applications
• VAT status

A small, straightforward softwood platform can cost considerably less than a raised composite deck with stairs, concealed fixings and aluminium framing. A roof terrace or balcony is a separate technical category and may require structural engineering, waterproofing coordination, fire-performance consideration and freeholder or managing-agent approval.

Ask each contractor to separate the boards, frame, groundworks, disposal and optional items in the quotation. A low headline figure is not comparable with a full specification if it excludes preparation, subframe replacement or waste.

Timber, hardwood or composite decking?

Softwood decking

Pressure-treated softwood is generally the lowest-cost board option. It can be cut and repaired easily, but it needs periodic cleaning and may require treatment or staining depending on the desired appearance. Movement, checking, splinters and colour change are natural considerations.

The treatment class and intended use matter. A board warranty does not protect an inadequately specified frame, so ask what timber is being used for joists, posts and any components close to the ground.

Hardwood decking

Hardwoods such as balau or ipe can provide a dense, natural surface with a long potential service life when properly detailed. They cost more, are harder to machine and will normally weather towards grey unless maintained. Responsible sourcing should be confirmed rather than inferred from the word “hardwood”.

Composite decking

Composite is a broad category rather than one uniform product. Boards may combine recycled or virgin polymers with wood fibres, use a capped surface or follow a different mineral-based construction. Price, heat retention, expansion, fixing systems, slip performance, fire data and warranties differ by range.

Composite reduces staining or oiling requirements, but it is not maintenance-free. Dirt, organic growth and food spills still need cleaning. The installer must follow joist-spacing, ventilation, drainage and expansion requirements for the specific board.

Do you need planning permission for decking?

In England, garden decking can normally fall within permitted development when it is no more than 30 centimetres above ground level, does not sit forward of the principal elevation and, together with extensions and outbuildings, does not cover more than half of the original garden area.

Those rules are not universal permission for every project. Listed buildings, conservation areas, flats, maisonettes, roof terraces, leasehold properties and homes with removed permitted-development rights need additional care. A raised deck affecting privacy or overlooking can also create planning and neighbour issues.

Ask the contractor to state whether planning responsibility sits with them, a designer or the homeowner. For leasehold property, obtain written freeholder or managing-agent consent before work starts. Where a deck forms part of an escape route, supports significant loads or interacts with waterproofing, seek appropriate technical advice.

The London Decking Company

Operational base: Unit 5, Sutton Business Park, Restmor Way, Wallington, Surrey SM6 7HQ

Phone: 020 8200 0882

Business hours: Monday to Friday, 8am to 4pm

Website

The London Decking Company is one of the clearest specialist choices for homeowners who want a contractor focused primarily on decking rather than a general builder adding it to a long list of services. The wider family business traces its decking activity to 1997, while the current limited company is active and was incorporated in 2008.

Its service covers design, supply and installation across London and the South East. The material range includes timber and composite options, with official industry listings identifying the company as a DeckMark-approved organisation and a recognised installer or supplier for brands including Trex and Millboard.

That combination makes it useful for clients who have not yet chosen a material. A consultation can compare the look and maintenance implications of timber with the product-specific warranties and installation rules of composite systems. The company also offers a supply-only route, although homeowners should not assume that buying approved boards alone creates a warrantied installation.

Pros

• Long-standing specialist focus on decking
• Timber and composite options rather than a single-board proposition
• DeckMark approval listed by the Timber Decking and Cladding Association
• Recognised through manufacturer and trade channels
• Design-and-build service for projects of different scales

Best for: Homeowners seeking an established decking specialist with a broad material choice.

What to confirm: Ask for the exact board, subframe specification, installer warranty and manufacturer warranty as separate written items.

The staff were open, friendly and professional

“From start to finish this was a wonderful company. After being quoted silly London prices for my SW5 property I was happy to finally have a reasonable quotation. All the way through all the staff were open, friendly and professional. They did a great job and would be happy to recommend them.”

Cel Difford, Google review

A really beautiful job done on our decking and steps

“A really beautiful job done on our decking and steps. They weren’t the cheapest but they were highly professional, efficient, hard-working, easy to have on-site and tidied up everything.”

Laura Woodward, Google review

Oilcanfinish Outdoor Living

Base: Wimbledon Village, south-west London

Phone: 07919 344450

Business hours: Monday to Friday, 9am to 7pm; Saturday, 9am to 1pm

Website

Oilcanfinish Outdoor Living is a particularly relevant option for composite decking in Wimbledon, Kingston, Richmond and surrounding parts of south-west London. Its official site documents recent Trex and Millboard installations and provides more technical project detail than many landscaping websites, including framing choices, joist tape, concrete supports, edge details and stair construction.

The business identifies itself as a TrexPro Platinum installer and works with Millboard as well as timber and Jacksons Fencing products. These relationships are useful when a homeowner has chosen a specific branded system, but the details still need to be checked at quotation stage. Warranty length can vary by board range, and a product guarantee is not the same as a guarantee for every element of labour, foundations or framing.

Oilcanfinish also installs pergolas, screening, fencing, balustrades and lighting. This makes it suitable for a coherent outdoor-living project without positioning it as a full planting-led garden-design practice.

Branded composite systems, aluminium or proprietary framing and bespoke edge details generally involve a different specification from a simple softwood platform. The written quotation should make those differences clear rather than presenting every deck as a comparable square-metre product.

Pros

• Strong documented focus on Trex and Millboard composite decking
• Project pages show structural and finishing details, not boards alone
• Relevant for Wimbledon and south-west London properties
• Can integrate fencing, pergolas, balustrades and lighting
• Clear direct contact route

Best for: South-west London homeowners wanting a technically detailed branded composite installation.

What to confirm: Check that the proposed installer status and warranty apply to the precise product range in the quote.

The team was friendly, worked quickly, and left everything tidy

“Jason and his team did a fantastic job on the decking at my house. They were professional and easy to work with, and the deck looks amazing. The team was friendly, worked quickly and left everything tidy when they were done.”

Ana Bagrova, Google review

The hard work, organisation and attention to detail were exemplary

“I am so happy with the decking and the excellent workmanship. The hard work, organisation and attention to detail were exemplary. Jason’s team were so friendly and professional.”

Pat Wildman, Google review

London Decking

Phone: 020 8050 4924

Business hours: Monday to Friday, 8am to 5pm

Website

London Decking is a separate north London business from The London Decking Company above. Its website focuses on deck installation across north, east, south and west London and includes project examples involving composite decks, timber decks, stairs, balustrades and swimming-pool surrounds.

The company offers a complete route from site visit and planning through material sourcing, preparation and installation. Its published portfolio is particularly useful for clients with changes in level, stairs or a deck that must connect a rear extension to the garden. These details often have more influence on the finished result than the colour of the board.

Timber, hardwood and composite options are available, making this another sensible provider to approach before deciding on material. The business also offers fencing and bespoke garden structures, although its primary public identity remains decking rather than broad landscaping.

Some telephone numbers appear inconsistently across pages, so use the current contact page or written enquiry form and confirm the number attached to the quotation.

Pros

• Dedicated decking focus with London-wide service pages
• Portfolio includes stairs, balustrades and complex level changes
• Timber, hardwood and composite options
• North London address and direct consultation route
• Can coordinate fencing and related structures

Best for: North London projects and decks requiring steps, edges or more involved structural detailing.

Planning tip: Send rough dimensions, photographs and access information with the initial enquiry to make the site discussion more useful.

JD4 Home Solutions Ltd

Base: Raynes Park, London SW20

Phone: 07926 629784

Contact: jd4hsolutions@gmail.com

Website

JD4 Home Solutions is a compact south-west London contractor specialising in composite decking, fencing and associated garden works. Its current site identifies projects around Raynes Park, Wimbledon and wider south-west London, with a portfolio covering composite decks, pergolas, paving and turfing.

JD4 works with composite products from more than one manufacturer, so homeowners should ask which board, fixing system and warranty route apply to their particular quotation.

The business may appeal to clients who want one contractor to replace an old deck and coordinate nearby fencing, paving or a pergola. Its project feedback frequently mentions daily tidying and practical design suggestions, both of which are relevant in London homes where the only access may be through the property.

The website states that the company offers free, no-obligation quotations. Insurance should nevertheless be verified directly, including the policy limit and whether it covers the proposed work. “Fully insured” is meaningful only when the client sees current documentation.

Pros

• Clear focus on composite decking in south-west London
• Can combine decking with fencing, paving, turfing and pergolas
• Small-team service may provide direct communication
• Current project gallery and review links
• Straightforward WhatsApp and telephone contact

Best for: Raynes Park, Wimbledon and south-west London homeowners wanting decking alongside a practical garden refresh.

What to confirm: Request current insurance evidence and a named board-and-frame specification before paying a deposit.

The team did an exceptional job transforming our decking

“David and the team did an exceptional job transforming our decking. Very professional and courteous in both the planning and execution, including tidying and sweeping at the end of each day.”

Nikita Gladilin, Google review

They exceeded my expectations

“They totally transformed my shabby garden into something worth spending time in. Hard-working, polite and courteous and within my price range.”

John Davis, Google review

Acacia Gardens

London office: 483 Green Lanes, London N13 4BS

Phone: 020 8800 3866

Contact: info@acacia-gardens.co.uk

Website

Acacia Gardens is best viewed as a garden design-and-build company that installs decking within a wider landscape rather than as a board-only decking fitter. Its services include timber and composite decking, paving, patios, fencing, retaining walls, planting and complete garden construction.

The company works across London and Hertfordshire, with specific coverage pages for north London areas including Hampstead, Highgate and Muswell Hill. It also documents work in central and south-west London. Its official decking guidance refers to softwood, hardwood and Millboard options.

This broader scope is valuable when the deck must relate properly to planting beds, paths, drainage, a patio or a complete change in garden levels. A dedicated deck specialist may be more economical for a simple replacement, while Acacia is likely to be more relevant where design coherence and hard-landscape coordination matter.

The business also has verifiable project recognition: a garden it constructed won the People's Choice Award for Best Get Started Garden at the 2024 RHS Hampton Court Palace Garden Festival. That award relates to the named garden rather than every private project, so it should not be treated as a blanket guarantee.

Pros

• Integrates decking with complete garden design and construction
• Timber, hardwood and composite options
• Strong relevance to north London
• Useful for drainage, level changes, planting and paving coordination
• Documented portfolio and named RHS project recognition

Best for: Homeowners redesigning the whole garden rather than treating the deck as an isolated surface.

What to confirm: Establish whether the quotation includes design drawings, planting, drainage and aftercare or construction only.

SW London Landscaping

Project address: 4 Lyon Road, Unit C, Wimbledon SW19 2RL

Phone: 07786 260444

Contact: swlondonlandscaping@gmail.com

Website

SW London Landscaping is a family-run landscaping and construction business with published decking projects in Wimbledon, Sheen, Richmond and Roehampton. Its portfolio includes hardwood balau decking, natural timber, composite decking and complete garden works.

The company is most useful when a deck is one element of a south-west London landscaping project. Its service list also covers paving, fencing, bespoke woodwork, garden lighting and garden construction. Published project pages show both full-garden schemes and individual hardwood decking work.

The website refers to Millboard composite decking, but clients should verify whether the company holds any current manufacturer-approved status required for a particular enhanced warranty. A contractor can competently install a product without being part of every manufacturer's formal network, but the distinction affects what should be promised in writing.

The written contract should identify the legal contracting business, project address, VAT treatment and payment schedule before work begins.

Pros

• Relevant portfolio in Wimbledon, Richmond, Sheen and Roehampton
• Hardwood, natural timber and composite experience
• Can coordinate lighting, fencing, paving and bespoke woodwork
• Suitable for complete garden projects
• Direct mobile and email contact

Best for: South-west London gardens combining decking with other hard-landscape work.

What to confirm: Ensure the quotation identifies the contracting entity, VAT treatment, address and exact materials.

The Garden Builders

Phone: 020 3982 7261

Website

The Garden Builders is a London landscape design-and-build practice suited to higher-complexity gardens, roof terraces and contemporary outdoor schemes. Its public portfolio includes compact city gardens, terraces, bespoke structures, planting and hard landscaping.

This is not the most obvious choice for a basic like-for-like deck replacement. It becomes relevant when decking must be designed as part of a wider architectural composition, coordinated with bespoke seating, lighting, planters, screens or a roof-terrace build.

Roof-terrace work requires substantially more than choosing an attractive board. Load limits, waterproofing interfaces, drainage, fire requirements, wind exposure, access and freeholder consent may all affect the design. A design-and-build landscape practice can coordinate these issues, but clients should still ask who provides structural and waterproofing responsibility.

Its portfolio is strongest in design-led urban gardens and terraces where bespoke structures, planting and hard landscaping need to read as one composition.

Pros

• Strong fit for complete contemporary garden and terrace schemes
• Design-and-build approach
• Experience with compact urban spaces and roof terraces
• Can integrate bespoke structures, lighting and planting
• Useful where aesthetic coordination is central

Best for: Design-led gardens and terraces where decking is one part of a substantial landscape project.

What to confirm: Ask which consultants are responsible for structure, waterproofing, planning and building-control issues.

Quick comparison

Which deck builder suits which project?

For a straightforward timber or composite deck

The London Decking Company and London Decking have the clearest specialist positioning and broad material choice. Compare their proposed frame, joist spacing, drainage details and edge treatment rather than choosing solely by board sample.

For a branded composite deck in south-west London

Oilcanfinish is particularly relevant where Trex or Millboard is already under consideration. JD4 Home Solutions is a practical local option for composite decking accompanied by fencing, paving or a pergola.

For a complete garden redesign

Acacia Gardens, SW London Landscaping and The Garden Builders are better suited to projects where the deck must be integrated with planting, retaining walls, lighting, drainage, paving or bespoke structures.

For a roof terrace

Start with a contractor capable of coordinating design, structure and waterproofing rather than a board installer alone. The Garden Builders may be relevant for design-led work, while specialist roof-deck suppliers and engineers may also be required. Obtain freeholder and planning advice before ordering materials.

For hardwood decking

London Decking, Acacia Gardens and SW London Landscaping all publish hardwood or timber capability. Ask for the species, certification, moisture condition, fixing approach and maintenance implications.

What a good decking quotation should include

A useful quote should contain enough detail for two contractors to be compared on the same basis. Look for:

• Measured deck area and drawing or marked layout
• Board manufacturer, range, colour and profile
• Board quantities and wastage allowance
• Subframe material, dimensions and treatment class
• Joist spacing and support method
• Ground preparation and vegetation control
• Drainage and ventilation provisions
• Steps, fascia boards, picture framing and balustrades
• Fixing system and visible-screw policy
• Removal and disposal of the existing deck
• Access assumptions and protection inside the property
• Parking, skip or permit costs
• Electrical work for lighting
• Start window and estimated duration
• Payment stages
• VAT status
• Installer workmanship warranty
• Manufacturer product warranty
• Exclusions and provisional sums

Do not accept a quote that says only “supply and fit composite decking” for a substantial project. The frame may represent a significant part of the cost and almost all of the long-term structural risk.

Questions to ask a deck builder

What will support the deck?

Ask whether the design uses posts, concrete pads, adjustable pedestals, ground screws or another system. The answer should reflect the soil, height and intended loading rather than habit.

What is the subframe made from?

Timber is common and can perform well when correctly specified, ventilated and kept away from persistent moisture. Aluminium or proprietary systems cost more but may suit premium composite boards or roof terraces. Ask why the chosen frame is appropriate.

How will water escape?

Boards are not a waterproof roof. Water must drain between or beneath them without pooling against the building, blocking air bricks or saturating the frame.

Will the deck increase overlooking?

A raised platform can affect neighbours' privacy and may need planning permission even when a low deck would not. Discuss finished height before construction.

Who is responsible for permissions?

The contract should say whether the homeowner, installer, designer or planning consultant handles planning, freeholder approval, building control and party-wall questions.

Can you provide current insurance?

Request evidence of public liability insurance and, where relevant, employers' liability and professional-indemnity cover. Check the name on the policy matches the contracting business.

What does the warranty actually cover?

Separate the board warranty, subframe warranty and workmanship warranty. Record who handles a claim if the manufacturer says the problem arose from installation.

Can I see a comparable completed project?

A recent deck using the same board and similar height is more useful than a general garden photograph. Ask whether a previous customer is willing to provide a reference.

Common decking mistakes to avoid

Reusing an unsuitable old frame

New boards can hide a deteriorating or incorrectly spaced subframe. A contractor should inspect it and state in writing whether it can be retained.

Choosing boards before solving levels

Door thresholds, damp-proof courses, air bricks and garden falls must be considered first. The desired indoor-to-outdoor look cannot override moisture and drainage requirements.

Assuming “non-slip” means slip-proof

No outdoor surface remains free of slip risk in all conditions. Leaves, algae, frost, grease and standing water affect timber and composite. Ask for published slip-test information and maintain the deck.

Ignoring expansion gaps

Composite boards move with temperature. Manufacturer spacing and fixing rules matter at board ends, walls and picture-frame borders.

Sealing in moisture

Solid fascia details can prevent ventilation when designed badly. The frame needs a route to dry.

Paying too much upfront

A reasonable deposit may secure materials and dates, but large advance payments increase risk. Use staged payments linked to clear milestones and retain the final payment until snagging is complete.

Before work starts

Photograph the route through the property and agree how floors, doors and communal spaces will be protected. Tell the contractor about buried services, drains, basement lightwells and known damp issues. Confirm working hours with neighbours or managing agents where access is constrained.

Order physical board samples and view them outdoors. Colour, texture and heat can look different in direct sun from a showroom. For composite products, read the current manufacturer's care and warranty documents yourself rather than relying on a verbal summary.

Finally, make sure the drawing shows finished height. A few centimetres can alter a step, obstruct a door, create overlooking or bring the deck too close to the damp-proof course.

Consumer and contract guidance

Use a written contract with the legal name of the business, address, price, VAT treatment, payment schedule, specification and cancellation terms. If you contract at home, online or by telephone, consumer cancellation rules may apply, but bespoke goods and work requested during the cancellation period can complicate the position.

Paying at least part of an eligible purchase by credit card may provide additional protection under Section 75 of the Consumer Credit Act where the cash price falls within the statutory range. Card protection and chargeback rules are fact-specific, so do not rely on them instead of checking the contractor.

Keep quotations, drawings, invoices, emails, board batch information and warranty documents together. If a dispute develops, photographs of the frame before the boards were installed may be especially important.

Choosing with confidence

The strongest deck is not necessarily the one made from the most expensive board. A modest surface on a well-drained, correctly spaced and accessible frame can be a better investment than premium composite fixed over weak structure.

For a simple installation, obtain at least three like-for-like quotations from specialist deck builders. For a complete garden or roof terrace, include a design-led landscaper and make sure technical responsibility is clear. In every case, spend as much time discussing the hidden frame, drainage and finished levels as the visible colour.

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