This sloping clay-soil garden was transformed into a wildlife-rich family landscape designed for year-round beauty, natural drainage, outdoor living, and long-term resilience.
At EWSP Consultancy, every garden begins with understanding how people want to live within their landscape. This concept design was carefully developed following an in-depth consultation with the client, focusing on creating a resilient, wildlife-friendly garden that balances family life, biodiversity, and long-term sustainability.
The concept plan for a London property, above, has been carefully developed to reflect the key aims identified during the client’s initial consultation call.
• A natural, organic, and lush planting style that brings nature closer to the home
• A garden that is visually appealing year-round, not just in summer
• A child-friendly space that can evolve with the family over time
• A functional entertaining space, including seating and sauna areas
• A design that addresses clay soil, drainage issues, and wind exposure
• Integration of a forest garden approach with layered planting
The overall vision is to create a diverse, wildlife-friendly, and family-oriented garden that functions as a long-term, low-maintenance haven.
Natural Drainage Solutions for Clay Soil Gardens
The design incorporates opportunities for rainwater capture and infiltration throughout the site, with planting and landform working together to slow, spread, and sink water naturally into the landscape.
Designing With Sloping Garden Levels
The shaping of the land (earthworks) plays a key role in this design, particularly in responding to the site’s slope, drainage challenges, and overall usability.
Working With the Existing Slope
Rather than resisting the natural gradient, the design works with it to:
- Create defined, usable spaces across different levels
- Improve movement through the garden, avoiding steep steps and creating an easier transition to the garden beyond the patio.
- Enhance visual interest and spatial flow
- Support water management by guiding natural drainage patterns
Subtle level changes help organise the garden into functional zones while maintaining a cohesive overall design.
Terracing & Level Definition
Where appropriate, gentle terracing or level transitions are proposed to:
- Form stable, practical areas for seating, play, and growing.
- Reduce erosion and runoff on sloped sections.
- Make the space safer and more accessible, particularly for family use.
- Enable smarter water management.
Sloping garden can be challenging, but the right design can ensure that you avoid common pitfalls and make the most of the opportunities of your specific situation.
Planning a garden on difficult ground, a slope, or clay soil? A Land Strategy Call helps identify practical ecological solutions before costly mistakes are made.
Rain Garden & Water Integration
Earthworks are closely integrated with the water management strategy:
- Shallow depressions and contoured landform direct water into rain garden areas
- These features help to slow, spread, and absorb water across the site
- This approach alleviates pressure on drainage while supporting lush planting.
- Rain gardens 1 and 2, (basins c. 10-15cm below surrounding soil level at the centre, with plenty of organic mulch and appropriate planting), are linked by a short culvert/ French drain below the path, allowing excess to spill from 1 to 2, and on, where water is excessive, to gravel-filled area below the sauna.
- A vegetated swale (c. 90cm wide and 30cm deep at centre, with gently sloping sides) takes excess water from the basin below the in-ground trampoline/ pond and slowly infiltrates it and sends excess to the rain gardens and, ultimately, overflows to gravel below the sauna in extreme conditions. This also doubles as an area for attractive, durable, resilient, native planting.
These strategies are particularly important given the clay soil conditions, which benefit from increased infiltration and reduced compaction.
Soil Movement & Improvement
Any excavation and reshaping of the land can be used strategically:
- Topsoil is retained and redistributed to improve growing areas
- Organic matter can be incorporated during works to enhance soil structure
- Raised areas can be formed where improved drainage is required
This ensures that earthworks contribute directly to long-term soil health and productivity.
Integration With Key Features
Levels have been carefully considered in relation to:
- Seating and entertaining areas, which are positioned on more stable, level ground
- Sauna placement, ensuring comfort, drainage, and accessibility
- Paths and circulation routes, designed to follow natural patterns of movement through the space.
Soil & Long-Term Fertility
To support a healthy, productive garden:
- Soil improvement will rely on organic, regenerative practices.
- Composting, mulching, and planting strategies will build fertility over time.
- Minimal disturbance approaches will protect soil structure.
I recommend creating new planting areas by marking out and sheet mulching with plenty of organic matter, to improve the clay soil and add humus over time.
Shelter Planting for Wind-Exposed Gardens
Layered planting and structural vegetation are used to reduce wind impact
- A mix of evergreen and deciduous species provides year-round shelter.
- Key seating and functional areas are positioned with protection in mind.
Forest Garden & Layered Planting
Across the site, planting follows a forest garden approach, including:
- Trees, shrubs, climbers, and ground cover layers
- Mixed native and productive species
- Year-round structure through evergreen and deciduous plants
This creates a resilient, low-maintenance planting system that evolves over time.
Child-Friendly Design Features
A key priority of this project is to create a garden that is safe, engaging, and adaptable for children, while also remaining functional and attractive for adults over the long term.
The design integrates child-friendly elements in a way that feels natural and cohesive, rather than separating “play” from the rest of the garden.
Safe & Accessible Layout
- Clear, defined pathways allow for easy and safe movement throughout the garden
- Open sightlines from seating and entertaining areas enable passive supervision
- Level changes are gradual and carefully considered to minimise trip hazards
This ensures the space is both practical for everyday use and comfortable for families.
The design includes a wide range of integrated play opportunities, including:
- A treehouse-style platform with ladder and climbing wall
- A swing with optional baby attachments
- A sand pit integrated into a coffee table feature
- A small children’s den / reading nook
- Natural play elements such as logs, planks, and stepping stones
These features are distributed throughout the garden, encouraging exploration and imaginative play.
Flexible Trampoline / Pond Area
A multifunctional space is designed to evolve over time:
- Initially suitable for an in-ground trampoline
- Built with drainage and overflow directed into the swale system
- Can later be converted into a wildlife pond
This is designed for long-term adaptability.
Flexible Family/ Entertaining Areas
Outdoor Living & Entertaining Area
Close to the house, a dedicated outdoor dining and kitchen space includes:
- A BBQ, sink, and preparation area
- Direct access from the house for convenience
- Suggested natural stone pavers with planting between.
- Integration with surrounding planting to soften the space
This area is designed for regular use and supports year-round outdoor living.
Sauna, partially earth-sheltered for heat retention, positioned for accessibility, with consideration of levels and drainage.
A pergola structure with seating area and adjacent planting areas provide:
- Space for climbing plants (e.g. wisteria)
- Herb beds and productive borders along edges
- A transition between ornamental and productive zones
- Deck below, with a relaxed seating area, multi-functional storage, and kids play features.
Reclaimed materials are proposed to enhance sustainability. I believe that much of what is currently there can be reused – though I have proposed moving and slightly reducing this area in size for light/ layout/ function reasons.
Planning a Garden on a Difficult Site?
Whether you are dealing with clay soil, drainage issues, slopes, or exposed conditions, ecological landscape design can transform challenging spaces into resilient, beautiful family gardens.
A Land Strategy Call helps identify practical, site-specific solutions before costly mistakes are made.
Book a consultation to discuss your project.