Pressure washing your own driveway, wall or roof needs nobody’s permission. What it does need, on a huge share of Dublin’s housing stock, is a bit of thought about the fact that “your own property” is a few feet from someone else’s car, washing line or open window.
No permission needed, in law
Cleaning the exterior of your own home is not a licensable activity and does not require planning permission, a notice to neighbours, or anyone’s sign-off. That is worth saying plainly, because the rest of this guide is about courtesy rather than rules — nothing below is a legal obligation, and none of it should read as though it is.
Noise and timing
A petrol pressure washer and a generator, if the job needs one, are genuinely loud at close range, and in a terrace or a semi-detached estate that noise reaches several houses at once rather than dissipating the way it would on a larger plot. There is no special rule for cleaning equipment specifically, but the general expectation most people already apply to any noisy garden work applies here too: avoid early mornings, Sunday, and anything that runs for hours without a break if it can reasonably be split across two shorter sessions.
Worth mentioning to whoever is doing the work if you know a neighbour works nights, has young children napping on a schedule, or is elderly and easily disturbed — a two-line heads-up beforehand costs nothing and avoids the conversation happening after the fact instead.
Where the water actually goes
This is the part that causes more friction than the noise does, because it is often not obvious until it has already happened. Runoff from a driveway, a wall or a roof does not stop at the boundary line. On a sloped drive it runs downhill regardless of whose garden that is; on a shared or narrow passage it can splash both walls equally; and slurry from a roof or render clean carries algae, moss and whatever treatment was used with it.
Where a treatment is involved rather than plain water, the environmental precautions in what eco-safe treatments mean cover drains, planting and ponds in more depth than this guide does — that page is about the chemistry and the law around it; this one is about the neighbour on the other side of the wall.
Shared walls, gates and side returns
A lot of Dublin terraces and semis share a side passage, a party wall, or a gate that serves both houses’ bins. Working on a wall that is genuinely shared — rather than simply close to a boundary — is worth a quick word first regardless of what the deeds say, because equipment and hoses in a passage neither house exclusively owns tends to go more smoothly agreed than assumed.
The same applies to render and wall cleaning on a gable that faces directly onto a neighbour’s garden rather than the street — the work is identical, but the access and the runoff both cross a line the street-facing elevation never does.
When it is worth a knock on the door
Three situations where a short conversation beforehand is worth more than it costs:
- A gable or rear wall facing directly into their garden rather than the street.
- A roof or gutter clean above a shared passage or their car’s usual parking spot, where debris and slurry have nowhere else to land.
- Anything likely to run for more than a couple of hours, so a normal day does not turn into an unexpectedly long one for someone next door.
None of this changes the method or the price of the work itself — see driveway and patio cleaning and roof cleaning for how each is actually done. It just tends to be the difference between a job nobody remembers and one somebody mentions at the next residents’ WhatsApp group.