Lawn Renovation Calculator UK | Full Renovation Cost & Materials
UK Lawn Renovation Tool

Lawn Renovation Calculator
UK — Cost & Materials

Work out grass seed, topsoil volume, fertiliser and scarifying — plus a realistic DIY vs. professional renovation cost for UK lawns.

Full Strip & Reseed Heavy Scarify + Overseed Topsoil Depth & Volume Estimated Cost in £
Calculate Renovation Renovation Guide
Tool

Lawn Renovation Cost & Materials Calculator

Use this tool to estimate materials and cost for a full UK lawn renovation — including seed, topsoil, fertiliser and a realistic DIY or professional price per m².[web:16][web:22]

Full Renovation Calculator

Choose full strip & reseed or heavy scarify + overseed

If you enter length AND width, area is calculated automatically.
For full renovations, 25–50mm of new topsoil is typical; lawns ideally have 100–150mm total topsoil.[web:17]
New lawn from seed is usually 50–70 g/m² depending on mix.[web:21]
Typical granular rate 25–35 g/m² for lawn fertilisers.[web:18][web:21]
UK lawn renovation services often start around £10–£15 per m² including materials.[web:22][web:25]
Renovation Materials Summary
Area
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m²
Topsoil
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m³
Grass Seed
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kg
Fertiliser
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kg
DIY Material Cost (Estimate)
Topsoil£0
Grass Seed£0
Fertiliser£0
Total Materials£0
Professional Job (Guide)
Rate per m²£0
Total Area0 m²
Estimated Total£0
Typical Turfing (re-turf)£0
Method

Full Lawn Renovation — Step by Step

For dead, bumpy or weed-dominated lawns, a full renovation gives better results than repeated patch repair.

1

Strip & Prepare

Remove old turf and weeds, then rotovate or cultivate the soil. Rake to a fine tilth and level carefully. Aim for at least 100–150mm of good topsoil depth for strong root development.[web:17]

2

Add Fresh Topsoil

Spread new topsoil across low areas and thin, compacted patches. A 25–50mm dressing over the whole lawn is common in UK renovations, blended into the upper soil layer for drainage.

3

Pre-Seed Fertiliser

Apply a pre-seeding fertiliser at 25–35 g/m² to provide phosphorus for root establishment.[web:18][web:21] Lightly rake it into the top 10–15mm so nutrients sit where new roots form.

4

Sow & Protect

Sow grass seed at 50–70 g/m², split into two passes at 90°. Lightly rake, roll or board the soil, then keep moist for 3–4 weeks while seedlings establish and fill out.

Choice

Overseeding vs. Full Renovation — Which Do You Need?

Use overseeding for tired but mostly grassy lawns; use full renovation when the lawn is mostly weeds, moss or bare soil.

Factor Overseeding Full Renovation
Typical seed rate 20–50 g/m² (depending on thin vs bare patches) 50–70 g/m² (new lawn from seed)
Topsoil required None to light topdressing only 25–50mm new topsoil dressing, sometimes more on poor soils[web:17]
Best for Thin, patchy but mostly grass Weed-dominated, very uneven, heavily compacted lawns
DIY material cost Low–medium (mainly seed and fertiliser) Medium–high (topsoil, seed, fertiliser, machinery hire)
Professional price guide From ~£10 per m² including labour and materials[web:22] New turf including prep often £15–£25 per m²[web:16][web:19]
Time to usable lawn 4–8 weeks 6–10 weeks from seeding; instant if re-turfed
When to choose Grass still covers >50% of area, soil level ok Grass cover <50%, severe thatch, bumps or drainage issues
UK Guide

Understanding UK Lawn Renovation Costs

How your square metre area, chosen method and soil condition affect the final price.

What does a professional renovation cost per m²?

Across the UK, professional lawn renovation (heavy scarifying, overseeding, fertiliser and aftercare) commonly starts around £10 per m² including labour and materials.[web:22] Full turf replacement with groundwork is usually higher, often in the £15–£25 per m² range depending on access and soil condition.[web:16][web:19]

Where does your DIY budget go?

  • Bulk topsoil, delivered by the cubic metre (m³)
  • Quality UK-certified grass seed, typically priced per kilogram
  • Pre-seeding and follow-up fertilisers at 25–35 g/m²[web:18][web:21]
  • Machinery hire (scarifier, rotovator, roller) for a weekend
  • Skip hire or green waste removal for old turf and soil

How deep should new topsoil be?

For healthy lawns, most UK guidance recommends a total topsoil depth of 100–150mm.[web:17] In a renovation, you rarely replace all of this — instead you add 25–50mm of fresh topsoil to improve the upper root zone and correct levels before seeding.

Example: 100 m² Full Renovation (DIY)

Assuming 100 m², 30mm new topsoil, 60 g/m² seed and 30 g/m² fertiliser:

  • • Topsoil: 100 × 0.03 = 3.0 m³
  • • Seed: 100 × 60 g = 6.0 kg
  • • Fertiliser: 100 × 30 g = 3.0 kg

If topsoil is £45/m³, seed £6/kg and fertiliser £2.5/kg, materials are roughly:

  • • Topsoil ≈ £135
  • • Seed ≈ £36
  • • Fertiliser ≈ £7.50

Total DIY materials ≈ £180, plus any machinery hire and waste removal.

FAQ

Lawn Renovation — Frequently Asked Questions

Answers to the most common questions about UK lawn renovation costs, methods and timings.

Professional turfing with preparation often costs in the region of £15–£25 per m², depending on access, soil condition and the quality of turf used.[web:16][web:19] Professional renovation without new turf (scarify, overseed, fertilise) typically starts around £10 per m².[web:22]
A full renovation using seed is usually cheaper than re-turfing the same area because turf is more expensive per m² and labour intensive to lay.[web:16][web:22][web:25] Renovation does require patience while seed establishes, but the long-term result is comparable if done correctly.
Most guidance suggests 100–150mm of topsoil for healthy lawns.[web:17] During renovation, you generally improve the upper layer by adding 25–50mm of new topsoil rather than replacing the entire depth, unless the soil is extremely poor or contaminated.
Use a pre-seeding fertiliser with a balanced or slightly higher phosphorus content to support root development, applied at around 25–35 g/m².[web:18][web:21] Avoid very high nitrogen products at seeding time to reduce the risk of scorching young seedlings.
Late summer to early autumn (August–September) is ideal, as soil is warm, rainfall increases and competition from annual weeds falls. Spring renovations also work but may require more watering and weed control as temperatures rise.
For a true full renovation, you either strip off the old turf or heavily scarify and kill existing weeds so the new seed can dominate. Light renovations can be done by scarifying, topdressing and overseeding without complete turf removal, but severely uneven or weed-heavy lawns usually benefit from starting over.
New seed lawns typically take 6–10 weeks to become robust enough for normal family use, depending on temperature and grass mix. Keep pets and heavy foot traffic off the area until the grass roots have anchored and the surface feels firm, then reintroduce use gradually.
For small lawns under 40 m², hand tools are possible but hard work. For larger areas, hiring a powered scarifier and rotovator for a weekend is usually more efficient and gives more consistent results. This may cost less than paying a professional if you are happy to do the labour yourself.
Adding a thin layer of topsoil over an existing lawn without scarifying or punching holes will often smother the existing grass and create a layer that roots struggle to penetrate.[web:17] Proper renovation involves removing thatch, creating some soil contact for seed and blending new topsoil into the upper profile, not just dumping soil on top.
At 50 g/m², a 5 kg bag covers about 100 m². At 70 g/m², the same bag covers around 71 m². The calculator above tells you the total kilograms required, so you can see whether 5 kg, 10 kg or multiple smaller bags are most cost-effective for your lawn area.

Ready to rebuild your lawn properly?

Use the calculator to plan your materials and budget, then choose quality UK topsoil, seed and fertiliser so your renovated lawn stays healthy for years.

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