In 40 seconds
Having an existing driveway professionally pressure-washed in the UK usually costs roughly £3–£8 per square metre, which works out at around £80–£150 for a single-car driveway and about £150–£300 for a double. Block paving sits at the upper end because the joints are re-sanded with kiln-dried sand as part of the clean, typically £3.50–£6 per square metre. Patios are usually £4–£8 per square metre. Sealing is an optional extra on top, commonly £3–£8 per square metre, and most drives only need a maintenance clean every 1–3 years. The honest answer is always a range, because it depends on your surface, its size and how dirty it is.
Most cleaning guidance is published by firms quoting for the work, so the numbers tend to be optimistic and the process glossed over. The pages below give honest cost ranges for cleaning and sealing an existing driveway, patio or block paving, explain how block paving is properly washed and re-sanded, and set out how often the job really needs doing — before you take a single quote.