Flooded driveways & standing water
In short
Drives that pond, flood or send water into a garage — diagnosed properly, because the cause is one of a small number of things and they have different answers. Levels, a blocked outfall, an undersized system or ground that simply cannot take any more.
Also called: Driveway floods · Puddles on my drive · Water in my garage · Drive holds water
Signs you need this
- Water standing on the drive for hours after rain stops
- Water reaching the garage, the front door or the house wall
- A gully or channel that overflows during heavy rain
- Run-off crossing the pavement and into the road
- Moss and algae in the areas that stay wet longest
- Water appearing on the drive when it has not rained hard
Standing water on a drive is always one of four things, and identifying which decides everything else. The levels are wrong, so water has nowhere to go. The drainage that exists is blocked or silted. The drainage that exists is too small for the area draining to it. Or the receiving ground or system is saturated and cannot accept any more. Each has a different answer, and treating a blockage as a design problem — or the reverse — wastes money.
Start with the cheapest possibility, because it is also the commonest. Silted channels, blocked gullies, a soakaway that has filled with fines because nobody fitted a silt trap, a downpipe gully full of leaves — these account for a large share of drives that flood, and clearing them costs very little. It is genuinely worth lifting every cover and grating and looking before anybody prices excavation.
Levels come next and they are the hardest to fix. A drive that falls towards the house or the garage will deliver water there in every serious downpour, and a channel across the threshold is mitigation rather than a cure. Where the fall is modest the surface can sometimes be regraded; where it is significant, the honest answer may be that the drive needs relaying to correct levels that were set wrong when it was built.
Capacity is a design question and it is increasingly the live one. Systems put in for a smaller drive twenty years ago are now serving an extended, widened, fully paved frontage, and the same single gully is trying to take three times the water. Adding hard surface without upsizing the drainage is a very common and entirely avoidable cause of flooding, and it is worth checking whenever a drive is being extended.
Then there is the local dimension, and it is a real one rather than a rhetorical flourish. Cheshire East's Preliminary Flood Risk Assessment names Macclesfield as the borough's only designated Flood Risk Area, with 47 internal flooding incidents recorded since 2011, and attributes part of that to an ageing network of unmapped, culverted watercourses running under the town. In the streets over and around those culverts, water appearing on a drive is not always a drive problem — and where the timing, the location or the pattern does not fit, that possibility gets ruled out before anybody prices groundworks.
Two things worth knowing about shared drainage. Since 1 October 2011, shared drains and sewers serving more than one property transferred to the water company, so a gully or a run in a shared yard or an entry that several houses use is very often United Utilities' to maintain rather than yours to pay for. That is worth establishing before commissioning private work — people pay for clearance they were entitled to have done free.
What the job covers
- Every cover, gully and grating lifted and inspected before anything is priced
- Existing drainage traced and its condition established
- Levels and falls surveyed rather than assumed
- Blockages and silting cleared as the first and cheapest step
- Capacity assessed against the area actually draining to it
- Regrading, additional channels or a larger outfall as the cause requires
- Groundwater and culvert-related causes ruled out where the pattern fits
- Shared-drain responsibility checked before you pay for anything
What it costs
We don't publish a price for this yet, because a number pulled out of the air is worse than no number at all — your contractor has to honour it. On driveways it would also be close to meaningless: the groundworks are usually the biggest single factor, and how deep the dig has to go varies enormously house to house. You'll get a firm price for your actual job when they ring you back, before any work starts. The quote itself is free and there's no obligation either way.
Common questions
Why does my drive suddenly flood when it never used to?
Usually because something has silted or blocked, or because the area draining to the same outfall has grown — a widened drive, a new extension roof, a patio added. Occasionally because the receiving system is now at capacity. Checking the existing drainage before assuming a design problem answers it in most cases.
Water comes into my garage. Is a channel drain enough?
It is the standard answer and it works, provided it is sized for the catchment and connected to an outfall that can take the flow. What it will not do is compensate entirely for a drive that falls steeply towards the building — in that situation the channel can be overwhelmed in a heavy storm, and regrading the levels is part of the real fix.
Could this be groundwater rather than my drive?
In this town, genuinely possible. Cheshire East designates Macclesfield as its only Flood Risk Area and attributes part of that to unmapped culverted watercourses under the town. If water appears when it has not rained hard, comes up rather than runs across, or affects several properties together, that gets investigated before anyone prices driveway drainage.
Who pays to clear a drain in a shared yard?
Very often the water company. Since 1 October 2011 shared drains and sewers serving more than one property transferred to the water company — here United Utilities — so a blockage in a shared run is frequently theirs to clear, free. It is always worth establishing that before paying a private contractor to do it.
Need this doing in Macclesfield?
Tell us the job and it goes straight to our local contractor — one call back, usually the same day. Free quote, no obligation.