It’s one of the most common questions we hear from South London homeowners: should I go for a patio or decking? Both create a usable outdoor living space, both add value to your property, and both have their passionate advocates. But they are genuinely different products — in terms of cost, maintenance, longevity, appearance, and how well they suit London’s particular conditions — and the right choice depends on your garden, your lifestyle, and your priorities.
This guide cuts through the noise and gives you a clear, honest comparison so you can make the right decision for your South London garden.
What’s the Difference?
A patio is a hard-surfaced area constructed from solid materials — most commonly natural stone such as sandstone, slate, or porcelain, though concrete slabs, brick, and granite sett are also widely used. Patios sit at or close to ground level and are laid on a compacted sub-base with a mortar bed, making them a permanent, structural feature of the garden.
Decking is a raised or ground-level platform constructed from timber boards or, increasingly, composite materials made from a blend of wood fibre and recycled plastic. It is built on a framework of joists and posts, sits above the ground surface, and can be used to bridge changes in level, extend from the back of a house, or create a platform over an uneven or sloping area.
Both are excellent in the right context. Neither is universally better. The question is which is better for your specific garden and situation.
How Each Performs in South London’s Climate
South London’s climate is the starting point for any honest comparison. The city is wetter than many people assume — annual rainfall sits around 600mm — and while winters are mild by UK standards, they bring sustained cold, damp, and frost. Summers can be warm and dry but are just as likely to deliver weeks of grey, wet weather. Any outdoor surface needs to cope with all of it.
Patios generally handle London’s climate extremely well. High-quality natural stone or porcelain paving, properly laid on a solid sub-base, is essentially impervious to weather. It doesn’t rot, warp, or degrade in wet conditions. It doesn’t become slippery with frost in the way that some surfaces do (particularly with a brushed or textured finish), and it doesn’t require seasonal treatment or protection. A well-laid patio in South London can look as good after twenty years as it did the day it was finished, with nothing more than occasional cleaning.
Decking, particularly traditional softwood timber decking, requires more management in London’s damp climate. Untreated or poorly maintained timber decking becomes slippery with algae and moss in wet conditions — a real safety concern — and requires annual cleaning, treating, and oiling to maintain its appearance and structural integrity. Left without maintenance, softwood decking will grey, crack, and eventually rot within a decade.
Composite decking performs significantly better in this regard. Modern composite boards are highly resistant to moisture, won’t rot or splinter, and require very little maintenance beyond an occasional clean. They do, however, carry a higher upfront cost than timber. If you’re considering decking for a South London garden, composite is almost always the more sensible long-term choice.
Cost Comparison
Cost is one of the most significant factors for most homeowners, and the picture here is more nuanced than many people expect.
For patios, the range is wide. Basic concrete slab paving sits at the affordable end, while natural stone — sandstone, limestone, slate — sits in the mid range, and premium porcelain or granite at the higher end. As a rough guide for South London, expect to pay anywhere from £80 to £200 per square metre installed for a good quality natural stone or porcelain patio, including excavation, sub-base preparation, and laying. The total cost for a typical South London back garden patio of 20–30 square metres would therefore fall broadly between £2,000 and £6,000 depending on material choice and ground conditions.
Timber decking can be cheaper upfront — basic pressure-treated softwood decking installed professionally might come in at £60–£120 per square metre — but that lower initial cost needs to be weighed against ongoing maintenance expenses and a shorter lifespan. Composite decking costs more to install, typically £100–£200 per square metre, and brings that figure closer to a mid-range patio, but with lower lifetime maintenance costs.
Over a ten to fifteen year horizon, a well-specified patio and a composite deck are often comparable in total cost when maintenance is factored in. A softwood timber deck, if it requires replacing after ten years, may end up costing considerably more.
Appearance and Design Flexibility
Aesthetics are subjective, but there are genuine differences in the design possibilities offered by each option that are worth considering.
Patios offer an enormous range of materials, colours, textures, and formats. From the warm tones of Indian sandstone to the cool, contemporary look of large-format porcelain, from the traditional character of reclaimed brick to the sleek precision of honed granite, the palette available is vast. Patios can be laid in various patterns — straight courses, herringbone, random, circular — and can incorporate contrasting borders, inset planting areas, and lighting recesses to create genuinely bespoke results. They tend to look more permanent and integrated into the garden than decking, and suit both traditional and contemporary settings with equal ease.
Decking has a warmer, more informal feel that many homeowners prefer, particularly for gardens used primarily as relaxed outdoor living spaces. It works beautifully alongside contemporary architecture and suits gardens designed around entertaining. Composite decking in particular comes in a wide range of colours and finishes, including convincing wood-effect options, and can be used to create multi-level platforms and built-in features like benches and planters. One area where decking has a clear advantage is where the ground level needs to be raised or where a sloping garden makes a ground-level surface impractical — decking can bridge these challenges elegantly in a way that paving cannot.
Practicality and Everyday Use
Day-to-day usability is where some of the most important differences emerge, and where personal lifestyle and priorities should guide the decision.
Patios are hard, flat, and stable — ideal for dining furniture, heavy planters, barbecues, and children’s play. They don’t flex underfoot, furniture legs don’t sink or snag, and they are easy to clean with a hose or pressure washer. Spilled drinks, food, and soil wash off easily, which matters in a garden used regularly for entertaining.
Decking has a softer, more yielding feel underfoot that many people find more comfortable, particularly barefoot in summer. However, it can be less stable for heavy furniture without proper support, gaps between boards can trap debris and require more careful cleaning, and the surface can become slippery when wet unless it has a textured anti-slip finish. Composite boards have improved significantly in this respect and most good quality products now include adequate slip resistance, but it remains a consideration worth checking before you buy.
For families with young children or older residents, a patio’s flat, stable surface is often the safer and more practical choice. For those prioritising a warm, informal feel and maximum comfort on long summer evenings, decking can feel more inviting.
Impact on Property Value
Both a well-designed patio and quality decking add value to a South London property, but the consensus among estate agents and surveyors is that good quality paving — particularly natural stone or premium porcelain — tends to be viewed more favourably by buyers than timber decking, which can be seen as a maintenance liability or a feature requiring replacement.
Composite decking fares better in this regard than timber, and a well-designed and well-maintained deck can absolutely add appeal. But if maximising property value is a priority, the safer and more broadly appealing investment is generally a high-quality patio. In the South London property market, where gardens are a significant selling point and buyers are sophisticated about what they’re looking at, the quality of hard landscaping is noticed and valued.
Planning and Permissions
For most residential gardens in South London, neither a patio nor a ground-level deck requires planning permission, provided the work falls within permitted development rights. However, there are exceptions worth being aware of. Properties in conservation areas — of which there are many across Lambeth, Southwark, Wandsworth, and other South London boroughs — may have additional restrictions. Listed buildings require consent for most external changes. And raised decking above a certain height (generally 300mm) may require permission regardless of location.
A reputable landscaping company will advise you on this before work begins, but it is always worth checking with your local council if you have any doubt. Getting the permissions right before work starts avoids costly complications later.
So Which Should You Choose?
If your South London garden has level ground, you want a low-maintenance surface that will look excellent for decades, and you’re investing in quality materials, a natural stone or porcelain patio is almost always the stronger choice. It handles London’s climate better, requires less ongoing maintenance, offers more design flexibility, and tends to add more reliable value to your property.
If your garden has a significant slope or level change that makes a ground-level surface impractical, if you have a strong preference for the warm, informal feel of timber, or if you’re working with an architecture that suits a contemporary deck perfectly, then quality composite decking is an excellent option — provided you’re prepared to invest in a good product and have it properly installed.
In many South London gardens, the answer isn’t actually either/or. A combination of patio and decking — a stone-paved main seating area with a raised composite deck at a different level, for example — can make excellent use of challenging terrain and create a more interesting, layered outdoor space than either surface alone.
Whatever you decide, the single most important factor is quality of installation. The best materials in the world will underperform if they’re not laid on a proper sub-base with correct drainage and jointing. Work with an experienced local landscaper, invest in materials you’ll still be happy with in fifteen years, and the decision between patio and decking will be the easy part.