How Much Does a Drainage Specialist Cost in London? (2026)
CPIH-adjusted estimate · ONS series L537 · Published 17 June 2026
How much does a drainage specialist cost in London?
A drainage specialist in London costs an estimated £76–£163 per job in 2026, after applying the ONS CPIH 04.3 "Regular Maintenance and Repair of the Dwelling" sub-index (122.026, 2015 = 100, published 17 June 2026) and the ONS regional price level for London. Gera Trade Cost Index: 92/100.
ONS CPIH 04.3 index (L537): 122.026 (2026 Jan–May average, 2015 = 100). Published . Fetched . Updated monthly when ONS publishes new figures.
CPIH-adjusted cost estimate
| Figure | Value | Source / note |
|---|---|---|
| Adjusted cost range | £76–£163 per job | CPIH 04.3 + RRCPL adjusted |
| Adjusted midpoint | £120 | Mid-range planning estimate |
| CPIH 04.3 index applied | 122.026 | ONS L537, 2015 = 100 |
| ONS regional price index | 107 | ONS RRCPL 2016, UK = 100 |
| Gera Trade Cost Index | 92/100 | 100 = national CPIH-adjusted average |
| National typical range (2015) | £70–£150 per job | Pre-adjustment national range |
This is a CPIH-adjusted planning estimate, not a measured transaction price. Always obtain an itemised quote before committing. Methodology
Drainage Specialist costs in London — context
A UK drainage specialist typically charges £70–£150 per job to clear a blocked drain at 2025 prices; the ONS CPIH maintenance sub-index reflects 21% cumulative trade-cost growth since 2015.
The London estimate of £76–£163 per job applies a regional price adjustment of 107/100 (ONS RRCPL 2016). London sits above the UK average price level, so trade costs here tend to be higher than in other regions.
Drainage Specialist costs by UK region
| Region | Adjusted range | GTCI |
|---|---|---|
| South East | £72–£154 | 99 |
| South West | £72–£154 | 99 |
| East of England | £70–£150 | 100 |
| East Midlands | £70–£150 | 100 |
| West Midlands | £70–£150 | 100 |
| North West | £70–£150 | 100 |
| Yorkshire and the Humber | £69–£148 | 100 |
| North East | £70–£150 | 100 |
Other trade costs in London
Frequently asked questions
How much does a drainage specialist cost in London?
A drainage specialist in London costs an estimated £76–£163 per job in 2026, after applying the ONS CPIH 04.3 "Regular Maintenance and Repair of the Dwelling" sub-index (122.026, 2015 = 100, published 17 June 2026) and the ONS regional price level for London. Gera Trade Cost Index: 92/100.
Why does a drainage specialist cost more or less in London than the national average?
The CPIH-adjusted estimate for London applies an ONS regional price-level (RRCPL) index of 107 (UK = 100, ONS 2016). An index above 100 means prices in this region tend to be above the UK average; below 100 means they tend to be below. Combined with the ONS CPIH 04.3 maintenance sub-index of 122.026 (2015 = 100), the result is a GTCI score of 92/100 for this trade-location combination.
What is the Gera Trade Cost Index (GTCI)?
The Gera Trade Cost Index (GTCI) adjusts published 2025 UK national typical-rate ranges for trades using two real, key-free ONS data sources: (1) the ONS CPIH 04.3 "Regular Maintenance and Repair of the Dwelling" sub-index (series L537, 2015 = 100, published in the Consumer Price Inflation dataset, OGL v3.0) — the official UK government inflation tracker for the trade-maintenance category; and (2) the ONS Relative Regional Consumer Price Levels (RRCPL) 2016 all-items index — the only official UK statistic that directly measures price-level differences between regions. Formula: adjusted_low = base_2015_low_cost × (CPIH_04_3 / 100) × (regional_RRCPL / 100); adjusted_high = adjusted_low × (national_high / national_low). base_2015_low_cost is the 2025 national lower bound deflated back to the 2015 index baseline (= national_low_2025 / 1.2104). The GTCI score (0–100) measures how a location's adjusted midpoint compares to the UK-average CPIH-adjusted midpoint (RRCPL = 100): a score of 100 means exactly at the national CPIH-adjusted average; scores below 85 indicate above-average cost for that trade in that area. No figure is a measured transaction price — all are estimates derived from the published indices and must be validated by obtaining an itemised quote.
Is this a real measured price for a drainage specialist in London?
No. This is a CPIH-adjusted planning estimate computed from ONS government data, not a price measured from GeraHome bookings. Use it as a benchmarking reference and always get an itemised quote before committing.
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Contains public sector information licensed under the Open Government Licence v3.0. Source: ONS Consumer Price Inflation (series L537 — CPIH 04.3 Regular Maintenance and Repair of the Dwelling), Office for National Statistics (ONS), published 17 June 2026, fetched 2026-06-20. ONS RRCPL 2016 regional price levels. Adjusted costs are planning estimates only; obtain an itemised quote before committing to any work.Full methodology.