Planning your garden transformation

A garden transformation is a significant project: significant in budget, in disruption, and in the years of enjoyment that follow. The difference between a transformation that delivers and one that disappoints almost always comes down to what happens before the first turf is lifted. This guide walks through how to plan a garden transformation properly, in the order that works: brief, site analysis, design, materials, build, planting and aftercare. It applies whether the project is a courtyard refresh or a full redesign on an acre.

We work on transformations of every scale across Kingston, Surbiton, Esher, Richmond and the wider Surrey area, and the patterns are remarkably consistent. The clients who end up with gardens they love are the ones who took the brief seriously, allowed proper time for design, chose a contractor on competence rather than price alone, and trusted the process. The detail below sets out each stage and the typical timeline.

Stage 1: the brief

A good brief is the foundation of a good project. Spend longer here than feels necessary; it pays back tenfold in design quality and reduced revisions. The questions worth answering before the first designer visit:

• How will the garden be used? Family with young children needs different things from a couple in their seventies entertaining adult friends. Identify the four or five activities that actually happen, not the ones that sound nice in theory.
• How much time can realistically be given to maintenance? Be honest. An ambitious mixed border on heavy clay needs 80 to 120 hours of work per year; the same border in low-maintenance form needs 20 to 30. Both can look beautiful; only one matches a busy family schedule.
• What problems need solving? Overlooking, drainage, slope, an awkward shape, a dead corner under a tree. Listing the negatives is as useful as listing the positives.
• What budget range is realistic? The detailed bands are further down this page. The headline: a serious transformation of a typical Surrey garden starts at £30,000 and runs to over £100,000.
• What is the timeframe? A six-month project from first meeting to handover is realistic for most schemes. Compressed timelines compromise quality; very long ones lose momentum.
• What gardens do you respond to? Photos from visits, books, magazines and reference gardens (Sissinghurst, Beth Chatto, Great Dixter, RHS Wisley) tell a designer more in five minutes than an hour of conversation.

Stage 2: site analysis

Before any design work begins, the site has to be properly understood. A good landscape designer will spend hours measuring, photographing and noting conditions before sketching anything. The variables that matter:

• Aspect. Which way the garden faces determines almost every planting decision. Sun-mapping (tracking where direct light falls hour by hour through the day) is the single most important site exercise.
• Soil. Most of our area sits on London Clay or its Bagshot Sand overlays. Texture, pH, depth and drainage all affect what will grow. The sausage test (roll moist soil between palms; clay holds a sausage shape, sandy soil falls apart) gives a quick read.
• Existing trees. Mature trees set the structure of the garden. Check for Tree Preservation Orders (the council holds the register) before any work that affects them. TPOs can block significant project elements if not identified early.
• Levels. Slopes, terraces and split levels change everything about layout. Take measurements; assume nothing is square or level until proven.
• Drainage and services. Heavy rainfall reveals where water gathers. Buried services (gas, electric, water, drains) need to be mapped before excavation; CAT scan surveys are cheap insurance.
• Microclimate. Frost pockets, wind funnels, hot south-facing walls. Each creates planting opportunities or constraints.

Stage 3: design

The design phase translates brief and site analysis into a buildable scheme. A proper design process moves through layout to materials to planting in that order, never the reverse. Skipping straight to plants or paving choices before the layout is settled is the most common cause of disappointing finished gardens. We cover the full process in detail in our designing your garden guide, but the short version:

• Concept design. One or two layout options showing how the spaces flow. This is the moment to challenge assumptions and reshape the brief if needed.
• Detailed design. The agreed concept developed to construction drawings: dimensions, levels, materials, paving patterns, drainage falls, planting schedule.
• Materials. Hard landscaping materials chosen against the design. Natural stone, porcelain, brick, timber, gravel, Corten steel, render: each has structural and aesthetic implications.
• Planting design. The planting plan ties everything together and is usually drawn last, once layout and materials are settled. A four-layer planting framework (trees, shrubs, perennials, groundcover) gives structure across seasons.
• Lighting and finishing details. Often the last 10% of the design work and the part that elevates the garden from good to beautiful at night.

Design typically takes four to eight weeks for a typical Surrey garden. Larger or more complex projects, particularly those involving structural alterations or planning permission, take longer.

Stage 4: budget reality

The hardest conversation in any garden project is the budget one. UK garden costs have risen significantly since 2020, driven by labour, materials and energy. Realistic 2026 budget bands for a typical Surrey garden of 100 to 250 sq m:

• £15,000 to £30,000: refresh. Refurbishing existing structures, reworking the planting, new lawn, lighting. The hard landscape stays largely as it is.
• £30,000 to £60,000: remodel. New patio or paths, repositioned beds, new boundary treatment, comprehensive planting, lighting. Most of the visible garden changes; the boundaries and major trees stay.
• £60,000 to £120,000: full redesign. Everything changes. New levels, new structures (pergolas, walls, water features), bespoke joinery, mature planting, full irrigation and lighting.
• £120,000 and above: high-end commission. Bespoke commissions, garden buildings, swimming pools, significant tree work, large mature specimens. Often closer to a small construction project than a typical garden.

Add roughly 8 to 12% for contingency on any scheme. Drainage surprises, hidden services and unstable subsoil account for most overruns; honest builders flag these risks upfront.