Garden rooms and outdoor spaces

Creating beautiful, fully insulated garden rooms for year-round use as a home office, studio or peaceful retreat, seamlessly integrated into your landscape design.

Bespoke garden room set within a landscaped garden

We design and build garden rooms and other outdoor structures that feel like a natural part of the garden, not an afterthought. That might be a fully insulated garden room for work or hobbies, a well-built shed, secure bike storage, or a pergola that gives the space more structure and purpose. Structural and electrical work is carried out by experienced specialists working under our project management, so the build standard matches the design intent. Flourish is led by Craig Davis, who holds a BSc (Hons) in Horticulture and brings more than 30 years of practical experience, which is why we look at how a new structure sits within the planting and wider garden, not just as a building in isolation.

The right structure can make a garden work much harder. It can create useful extra space, solve practical storage problems, or give the garden a stronger focal point. What matters is that it is well designed, properly built, and suited to the house and the surrounding landscape. Where needed, we can incorporate it into a wider garden design and build project or coordinate it with related works such as hard and soft landscaping, patios and paving, and planting design and installation.

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In this guide

Garden rooms designed around how you live

A garden room can be used in all sorts of ways, but the starting point is always the same: how you want the space to function and how it should sit within the garden.

Some clients want a quiet home office away from the house. Others want a studio, hobby room, garden retreat, gym, music room, or a flexible extra space that can evolve over time. We design each one to suit the intended use, the size of the plot, and the wider garden layout.

We advise on position, scale, materials, and how the structure connects with paving, planting, screening and lighting, so it feels properly integrated rather than dropped into the space. In many cases, clients also combine a new garden room with garden lighting, fencing and screening, or a more complete set of designs and plans.

Sheds, storage and practical garden buildings

Not every structure needs to be a garden room. In many gardens, the priority is straightforward, well-designed storage that looks good and works properly.

We build bespoke sheds and outdoor storage solutions for tools, equipment, bins, bicycles and general garden use. These structures can be simple and functional or more carefully detailed, depending on the setting and how visible they are within the garden.

The aim is always the same: to create something durable, useful and in keeping with the rest of the space. If the wider garden also needs clearer definition, these elements can sit alongside other garden features and structures or help support a more low-maintenance layout.

Bike storage that is secure and unobtrusive

Secure bike storage needs to do more than just keep bikes dry. It also needs to be easy to use, robust enough for daily life, and discreet enough not to dominate the garden.

We build bike storage with weatherproof construction, secure doors, and a finish that works with the style of the property and garden. Where space is limited, we also help plan storage so that access and circulation still work properly, especially where it needs to sit near a path, driveway or entrance area.

Pergola and outdoor seating area within a landscaped garden

Pergolas and outdoor features

Pergolas and similar structures can change the feel of a garden very quickly. They help define a seating area, support climbing plants, create a stronger sense of enclosure, or simply give the garden a clearer structure.

Used well, they add more than decoration. They help organise space and make patios, dining areas and entertaining spaces feel more settled and intentional.

We design pergolas and outdoor features to sit comfortably with the materials, planting and character of the garden, whether the overall look is traditional, contemporary or somewhere in between. They often work particularly well as part of a broader scheme involving decking, patios, paths and driveways, or tailored planting design.

Construction specification

The difference between a garden room that performs well for 25 years and one that fails within five is in the specification. What is hidden behind the cladding matters more than what is visible. Below is the standard specification we work to, with each element chosen to suit Surrey conditions and year-round use.

Foundations

Surrey’s heavy London Clay moves seasonally and any foundation that underestimates this will fail. For most garden rooms we specify either reinforced concrete pad foundations or ground screws set to engineered depth. Ground screws are particularly useful where access is limited or where root protection is needed for nearby trees.

Frame and walls

Timber frame construction with treated softwood studs at 400mm centres, with structural sheathing for racking strength. Wall thickness typically 140mm to allow for proper insulation. Vapour barriers and breather membranes installed correctly to manage moisture across the wall build-up.

Insulation

This is what makes a garden room genuinely usable year-round rather than only on mild days. We specify high-performance PIR insulation board in walls, floor and roof, with U-values that comfortably meet current standards for habitable spaces. Walls typically achieve a U-value of around 0.18 W/m²K, floors and roofs similar. The result is a room that holds heat in winter and stays cool in summer without excessive energy use.

Glazing

Double-glazed aluminium or timber units as standard, with options for triple glazing where heat loss or solar gain are concerns. Glazing is specified with appropriate solar control coatings for south-facing positions, since over-glazing without shading turns a garden room into a greenhouse in summer.

External cladding

Western red cedar, Siberian larch or thermally modified timber are our usual choices for a natural timber finish that weathers well. Composite cladding and rendered finishes are also available where a different look is wanted. All cladding is installed over a ventilated cavity to manage moisture.

Roofing

Flat roofs typically finished in EPDM rubber membrane (50 year design life). Where appropriate, we install a sedum or wildflower green roof system, which adds biodiversity, slows runoff and softens the structure visually. Pitched roofs are slate, tile or shingle depending on style.

Electrics, heating and connectivity

Full electrical installation by qualified electricians working under our garden electrics service, with sub-board, dedicated circuits, sockets, internal lighting and external lighting. Heating options include slim electric panel heaters, infrared panels and air source heat pumps. Data cabling and WiFi extension can be specified where the room will be used as an office.

Planning permission and Building Regulations

One of the most common questions about garden rooms is whether they need planning permission. The answer is usually no, but with important caveats. The distinction between Planning Permission and Building Regulations matters, since a structure can be permitted-development compliant but still require Building Regulations approval.

Permitted development rules

Most garden rooms can be built under permitted development without a planning application, provided they meet all of the following:

  • Single-storey, with a maximum height of 2.5m if within 2m of any boundary
  • Maximum overall height of 4m for a pitched roof, 3m for a flat or non-pitched roof
  • Total combined area of all extensions, sheds and outbuildings does not exceed 50 percent of the garden
  • Not located forward of the principal elevation of the house
  • Not used as separate residential accommodation (no sleeping, no separate household)

When planning permission is required

Permission is required if any of the permitted development rules are exceeded, or if your property is listed, in a conservation area, an Area of Outstanding Natural Beauty, or has had previous permitted development rights removed. We assess these factors at the survey stage and can prepare and submit a planning application where needed.

Building Regulations

Separate to planning, Building Regulations apply when a garden room exceeds 15m² of internal floor area, contains sleeping accommodation, or is closer than 1m to a boundary using combustible materials. Building Regulations cover structural integrity, insulation, fire safety, electrical safety, drainage and ventilation. Where applicable, we manage the Building Regulations application and inspection process.

We provide written advice on both Planning Permission and Building Regulations as part of our initial site assessment, so you know what is needed before any work begins.

Planting around your garden room

A garden room without considered planting around it looks like a building dropped into a lawn. With the right plants, it reads as a designed part of the garden. Climbing plants on adjacent walls, soft layered planting along the base, and a tree or two to give context can transform the result.

For climbers on the walls or adjacent screening, we specify Trachelospermum jasminoides (evergreen scented coverage), Clematis spp. for seasonal flowering, and Hydrangea anomala subsp. petiolaris for shaded north-facing walls. For the base of the structure, Hakonechloa macra, Geranium ‘Rozanne’ and Salvia nemorosa all work hard with little intervention. See our planting design service for full schemes.

How we work

We do not take a one-size-fits-all approach. Some gardens need a simple, practical solution. Others need a structure that becomes a major part of the overall design. We look at the garden as a whole and design accordingly.

That includes thinking about:

  • how the structure will be used day to day
  • where it should sit within the garden
  • how it connects with paths, patios and planting
  • what materials will age well in the setting
  • orientation, solar gain and natural light
  • Planning Permission and Building Regulations implications
  • how to balance practicality, appearance and longevity

If the structure forms part of a wider redesign, we incorporate it into a broader garden design and build project. If the priority is a specific element, we focus on that as a standalone piece of work.

Common questions about garden rooms

Do I need planning permission for a garden room?

Most domestic garden rooms fall within permitted development and do not require planning permission, provided they meet the rules on height, floor area and position. Listed buildings, conservation areas and properties with restrictions on permitted development rights are the main exceptions. We assess this at the survey stage and produce specifications that work within the rules.

Do I need Building Regulations approval?

Building Regulations apply separately to planning. Approval is required if the internal floor area exceeds 15m², if the room contains sleeping accommodation, or if it is closer than 1m to a boundary using combustible materials. Where applicable, we manage the Building Regulations application and inspection process on your behalf.

How long does it take to build a garden room?

On-site build time for a typical garden room is 4 to 8 weeks, depending on size, complexity and any associated landscaping. Foundations and groundworks usually take the first week to ten days, with frame, cladding, insulation, glazing, internal finishes and electrics following in sequence. We provide a clear written programme with every quotation.

Are garden rooms genuinely usable year-round?

A properly specified and insulated garden room is comfortable year-round. The combination of high-performance PIR insulation, double or triple glazing and an appropriate heating source (electric panel heaters, infrared or air source heat pump) keeps the room warm in winter without excessive running costs and cool in summer with the right solar shading. Poorly insulated garden rooms are typically only comfortable for half the year.

Can I have plumbing or a bathroom in the garden room?

Yes, but this triggers Building Regulations approval and requires a connection to the foul drainage system. We can specify and install plumbing, sink areas, and full bathrooms where required, working with qualified plumbers and within Building Regulations.

What foundations are used on Surrey clay sites?

Heavy London Clay moves seasonally, so foundations need to either work with the movement (engineered concrete pad foundations) or sit below it (deep ground screws). We assess the site at survey stage and specify accordingly. We never use unsuitable shallow foundations on clay sites; doing so is the most common cause of garden room failure within the first five years.

How long does a well-built garden room last?

A garden room built to our standard specification has a design life of 25 to 30 years, with major components (insulation, structural frame, EPDM roofing) likely to perform well past that. External cladding may need replacement or refurbishment within 15 to 20 years depending on the material specified. Glazing units typically last 20 to 25 years.

Can the structure be integrated with the wider garden design?

Yes, this is one of the main advantages of working with us rather than a specialist garden room company. Because we also design and build the surrounding paving, planting, lighting and boundaries, the room sits within a coherent garden rather than being dropped into a lawn. We can incorporate the room into a complete garden design and build or coordinate it with works you already have planned.

Areas we cover

We design and build garden rooms across Kingston upon Thames, Surbiton, Richmond and the wider Surrey and South West London area. Key locations include:

Thinking about a garden room or outdoor structure?

If you are considering a garden room, shed, pergola, bike store or another outdoor feature, we would be glad to talk it through with you.

Contact us to discuss your project.

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