Do I need garden drainage when landscaping?

Garden drainage may be needed if the garden holds water, slopes towards the house, has clay soil, or is being covered with patios, decking or artificial grass. Drainage should be checked before finalising a landscaping quote.

Garden Landscaping Cost Calculator UK

Q: How much does garden landscaping cost in the UK?

Garden landscaping can cost from a few thousand pounds for a small refresh to £15,000 to £40,000 or more for a full redesign with patios, decking, fencing, drainage or retaining walls. Size, access, ground condition and the mix of hard and soft landscaping affect the final price.

Q: Why is landscaping so expensive?

Landscaping can become expensive because the visible finish is only part of the job. Excavation, waste removal, ground preparation, drainage, retaining walls, access and labour time can all add significant cost.

Q: What is the cheapest way to landscape a garden?

The cheapest approach is usually to keep the design simple, reuse existing levels where possible, limit structural work, use turf instead of large paved areas, and avoid unnecessary changes to drainage or retaining walls.

Q: Is artificial grass cheaper than turf?

Artificial grass usually costs more upfront than natural turf because the material and base preparation are more expensive. Turf is usually cheaper to install, but it needs ongoing maintenance.

Calculate garden landscaping cost

Choose the main parts of the garden project. The calculator combines hard landscaping, soft landscaping and structural allowances into one planning range.

Total garden area

Use the approximate area being landscaped, not necessarily the full property plot.

Patio area

Decking area

Lawn surface

Lawn size

Fencing

Retaining walls

Retaining walls can change the project cost quickly because they involve structure, levels and ground movement.

Garden drainage

Current garden condition

Access

Finish level

Region

Include contingency?

Estimated landscaping cost

Estimated range £7,800 – £16,400

Estimated cost per m² £98 – £205

Cost band Typical

Contingency included 15%

Element breakdown

Patio£2,300 – £4,600

Decking£0

Lawn£600 – £1,400

Fencing£1,800 – £3,600

Retaining£0

Drainage£700 – £1,800

This estimate is mainly driven by patio size, lawn choice, fencing, drainage, access and garden condition.

Get local landscaping quotes Compare landscaping calculators

A landscaper needs to inspect levels, access, drainage, ground condition and waste removal before confirming a fixed quote.

Why landscaping costs vary so much

Landscaping costs vary because a garden project is usually a mix of visible finishes and hidden preparation. A simple lawn refresh is very different from a full redesign with hard surfaces, drainage and retaining walls.

Hard landscaping

Patios, decking and paved areas usually carry higher costs because they need preparation, levels, sub-base work, drainage planning and careful installation.

Soft landscaping

Turf, planting and soil improvement can be lower cost than paving, but the final price still depends on preparation, soil quality and the size of the area.

Structural work

Retaining walls, drainage, steps and major level changes can push a garden project into a higher cost range because they solve site problems, not just surface appearance.

Compare landscaping elements

Use the full calculator above for a combined estimate, then move into the specific calculator that matches the most important part of your project.

Element	Typical cost behaviour	Best suited to
Patio	Mid to higher range	Outdoor dining, seating areas and hard-wearing garden zones
Decking	Varies by timber, composite and height	Raised areas, sloped gardens and warm outdoor living spaces
Turf	Usually lower upfront	Natural lawns, family gardens and softer green space
Artificial grass	Higher upfront than turf	Low-maintenance lawns and shaded or high-use areas
Fencing	Driven by length, panels and posts	Privacy, boundaries and garden security
Retaining wall	Can become structural and high-cost	Sloped gardens, level changes and soil retention
Garden drainage	Often hidden until the site is inspected	Wet gardens, clay soil, poor falls and paved areas

Typical UK garden landscaping cost ranges

These are broad planning ranges. A full garden redesign can vary widely because two gardens with the same area can have completely different levels, access, drainage and material choices.

Project type	Typical range	Cost pattern
Small garden refresh	£2,000–£6,000+	Turf, light clearance, small patio or simple planting
Standard garden landscaping	£6,000–£15,000+	Patio, lawn, fencing and moderate preparation
Full back garden redesign	£15,000–£40,000+	Multiple zones, premium finishes, drainage and level work
Sloped or problem garden	£12,000–£50,000+	Retaining walls, steps, drainage and heavy groundworks
Low-maintenance garden	£5,000–£20,000+	Artificial grass, paving, raised beds and limited planting

What affects garden landscaping cost?

The final quote depends on how much of the garden is being changed, what materials are being used and what problems need to be solved before the finish is installed.

Garden size

Larger gardens usually cost more overall, but the cost per m² can vary depending on whether the work is simple turfing or a detailed multi-zone design.

Number of elements

A patio-only project is easier to price than a garden with paving, lawn, fencing, drainage, steps, retaining walls and planting.

Ground condition

Uneven ground, poor soil, old concrete, tree roots, rubble, clay and poor levels can increase preparation and waste removal costs.

Drainage

Drainage can affect patios, turf, artificial grass and retaining walls. Water needs somewhere safe to go after the layout changes.

Access

Limited side access, steps, terraced gardens and no room for machinery can make material delivery and waste removal slower.

Finish level

Premium paving, composite decking, porcelain slabs, decorative fencing and detailed planting plans usually increase both material and labour cost.

The hidden cost layer: preparation, drainage and retaining work

The most expensive part of landscaping is often the part you do not see at the end. Clearance, excavation, skips, soil improvement, drainage, sub-base work and retaining walls can all change the quote before a patio slab, fence panel or roll of turf is installed.

If water is the issue, use the Garden Drainage Cost Calculator. If your garden has a slope or level change, compare the allowance with the Retaining Wall Cost Calculator.

Front garden projects can also overlap with excavation and access issues. For that side of the project, compare the Driveway Excavation Cost Calculator.

Already have a landscaping quote?

Check whether the quote separates visible finishes from preparation. A strong quote should make it clear what is included for excavation, waste removal, sub-base, drainage, retaining walls, fencing, turf, paving and final finish.

If the quote is mainly for one part of the garden, compare it with the relevant calculator: patio cost, decking cost, fencing cost, turf installation cost or artificial grass cost.

Planning landscaping as part of wider home improvement?

Garden landscaping often connects with other project costs. A rear extension can leave a garden needing new levels, drainage, patios or turf, so compare your plans with the extensions cost calculators.

Front garden work may overlap with access, excavation and driveway surfaces. If the project includes parking or a new front approach, use the driveway cost calculators.

If the main issue is water management, compare this estimate with the wider drainage installation cost calculator.

How this landscaping estimate is calculated

The calculator starts with typical cost ranges for each selected landscaping element. It then adjusts the combined project range using garden condition, access, finish level, region and contingency.

This gives a more useful planning estimate than a single average garden cost because it separates hard landscaping, soft landscaping and structural work.

For more detail, read our methodology, pricing data and how costs are calculated.

Garden landscaping decision paths

Use these paths to move from a rough garden idea to the most relevant calculator.

I want a full garden estimate

Start with this Garden Landscaping Cost Calculator. It combines the main parts of a project into one estimate.

I only need a patio

Use the Patio Cost Calculator if your main cost is paving, slabs, porcelain, sandstone or an outdoor seating area.

I want a raised outdoor area

Use the Decking Cost Calculator for timber or composite decking, especially on sloped or uneven gardens.

I want a lawn

Compare the Turf Installation Cost Calculator with the Artificial Grass Cost Calculator.

I need privacy or new boundaries

Use the Fencing Cost Calculator to estimate the cost of panels, posts, gravel boards and labour.

I have a wet or sloped garden

Check the Garden Drainage Cost Calculator and the Retaining Wall Cost Calculator before finalising the visible finish.

Garden landscaping cost FAQs

How much does garden landscaping cost in the UK?

A small garden refresh may cost £2,000 to £6,000+, while a full redesign with patios, fencing, drainage and retaining work can reach £15,000 to £40,000+.

Why is landscaping so expensive?

Landscaping includes labour, waste removal, ground preparation, materials, access, drainage and sometimes structural work. The visible finish is only part of the total cost.

What is the cheapest way to landscape a garden?

Keep the design simple, avoid major level changes, limit premium paving, reuse existing features where practical and choose turf over large hard-surfaced areas.

Is artificial grass cheaper than turf?

No, artificial grass usually costs more upfront. Natural turf is typically cheaper to install, but it needs mowing, watering and maintenance.

Do I need drainage for a patio?

Many patios need drainage planning, especially if water could run towards the house, sit against walls or collect on clay soil.

Can retaining walls increase landscaping cost?

Yes. Retaining walls can be one of the biggest cost drivers because they deal with soil pressure, levels, foundations and drainage behind the wall.

Should I landscape the garden after an extension?

Often, yes. Extensions can disturb levels, access, drainage and lawn areas, so landscaping may be needed to finish the outdoor space properly.

Are CostIntel landscaping estimates fixed quotes?

No. They are planning estimates based on typical UK landscaping cost drivers. A contractor needs to inspect the garden before giving a fixed quote.