Back garden redesign

Given the UK's unpredictable climate, a successful redesign must balance aesthetics with practicalities like effective drainage and durable material selection. This guide outlines what to expect when hiring a professional landscaper to overhaul your outdoor space in 2025/26.

What Does the Work Involve?

• Site Survey and Design: Measuring levels, assessing soil type, and identifying sun/shade patterns to create a workable layout.
• Site Clearance: Professional removal of old paving, unwanted trees, shrubs, and existing structures like dilapidated sheds.
• Groundworks and Drainage: Excavating the site to the correct depth and installing soakaways or ACO drains to prevent waterlogging.
• Hard Landscaping: Constructing the "bones" of the garden, including patios, retaining walls, decking, fencing, and pathways.
• Sub-base Preparation: Laying and compacting MOT Type 1 or similar aggregates to ensure structural integrity for heavy stone or porcelain.
• Soft Landscaping: Improving soil quality with organic matter before laying turf, sowing seed, or planting herbaceous borders and trees.
• Finishing Touches: Installing exterior lighting, irrigation systems, and applying sealants or decorative mulches.

Typical Costs

Landscaping costs vary significantly based on material choice (e.g., Indian Sandstone vs. Italian Porcelain) and site access. The prices below include professional labour, materials, and VAT for 2025/26.

Factors such as "muck away" (removing large volumes of soil), limited access through a terraced house, and the need for specialist machinery like mini-diggers will push costs toward the higher end of the scale.

How Long Does It Take?

• Small Courtyard/Patio Refresh: 5–8 working days.
• Standard Medium Garden Overhaul: 2–4 weeks, depending on weather.
• Large-scale Project with Masonry: 6–10 weeks for complex builds involving retaining walls or outdoor kitchens.
• Planting Only: 1–3 days once all ground preparation is complete.

DIY or Professional?

While DIY is suitable for basic planting or painting fences, a full redesign involves structural engineering and complex drainage. Incorrectly installed patios will sink or "rock" within one winter, and poor drainage can lead to damp issues in your home's foundations.

Professional landscapers have the machinery and expertise to manage levels and soil disposal, which are the most physically demanding and technically difficult parts of the job.

Any electrical work (lighting) must be carried out by a Part P registered electrician, and gas fire pits or outdoor kitchens require a Gas Safe engineer. Attempting these yourself is not only dangerous but can invalidate your home insurance.

Choosing the Right Tradesperson

• Check Accreditations: Look for members of the Association of Professional Landscapers (APL) or the British Association of Landscape Industries (BALI).
• Verify Insurance: Ensure they hold at least £2 million in Public Liability insurance.
• Portfolio Review: Ask to see photos of "work in progress," not just finished shots, to see the quality of their sub-bases.
• Waste Licence: Confirm they hold a valid Environment Agency waste carrier's licence to ensure your garden waste isn't fly-tipped.

Questions to ask:

• "How will you manage site drainage to ensure water doesn't pool near the house?"
• "Can you provide a breakdown of material costs versus labour?"
• "What is your policy for handling unforeseen ground conditions (e.g., buried concrete)?"

UK Regulations

• SUDS (Sustainable Urban Drainage Systems): You generally do not need planning permission to pave your back garden, but you must use permeable materials or direct run-off to a lawn or border.
• Boundary Walls: Planning permission is usually required for walls or fences over 2 metres high (or 1 metre if next to a highway).
• Tree Preservation Orders (TPOs): Always check with your local council before removing established trees, as fines for breaching a TPO are substantial.
• Building Regulations: Required if you are building a significant retaining wall (usually over 1 metre) or a large outbuilding/garden office.

Common Problems

• Subsidence and Sinking: Caused by an inadequate sub-base. A professional should use a minimum of 100mm-150mm of compacted MOT Type 1.
• Efflorescence: White salty deposits on new stone. This is natural but can be minimised by using the correct mortar mix and sealing stone at the right time.
• Poor Drainage: "Puddling" on lawns or patios often occurs when the garden hasn't been graded with a slight fall away from the property.
• Invasive Species: Failure to identify Japanese Knotweed or Bamboo before starting work can lead to expensive structural damage later.

Frequently Asked Questions

Do I need planning permission for a garden redesign?

In most cases, no. However, you will need it for walls over 2m, significant changes in ground levels, or if you live in a Conservation Area or Listed Building. Always check with your local authority first.

What is the best time of year to redesign a garden?

Autumn and winter are ideal for hard landscaping and structural work so that the garden is ready for planting in spring. However, very wet or freezing conditions can delay concrete and mortar work.

Why is porcelain more expensive to install than sandstone?

Porcelain requires a specialist diamond blade for cutting and a "primer" (SBR) applied to the back of every slab to ensure it bonds to the mortar. It is more labour-intensive than natural stone.

How can I reduce the cost of my redesign?

Choose high-quality materials for the areas closest to the house (like the main patio) and use cheaper alternatives like gravel or bark for secondary paths and utility areas.

Will a landscaper remove all the old soil and rubble?

Yes, but this is a significant cost factor. "Muck away" services via grab lorries or skips are expensive, so discuss if any soil can be repurposed for raised beds or mounds on-site.