Crack in Exterior Wall
A visible crack running through the outside wall of your property, which may be widening over time.
What Is Causing This?
- 1Subsidence caused by ground movement or tree roots
- 2Thermal expansion and contraction of brickwork
- 3Settlement of a newer extension joining the main building
How Urgent Is This?
This needs prompt attention. Delaying could cause further damage, safety risks, or significantly higher repair costs.
What Needs to Be Done
A builder or structural engineer will assess the crack pattern and severity. Minor cracks may just need repointing, while structural cracks may require underpinning, crack stitching, or wall ties.
How Much Will It Cost?
National average estimate
Labour: £3,325 – £8,250 | Materials: £2,300 – £6,700
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Ask a QuestionPlanning Permission Guidance
Some fixes for this problem may require planning permission or building regulations approval. Check if your project needs permission:
Generally permitted under Part 1, Class A of the GPDO. Standard permitted development allows a maximum projection of 3m ...
Garage ConversionGenerally permitted as an internal alteration that does not enlarge the building. Replacing the garage door with a windo...
Basement ConversionInternal works to convert an existing basement or cellar are generally permitted as internal alterations. However, excav...
How to Prevent This
Keep trees at a safe distance from foundations. Maintain guttering so water drains away from walls. Monitor any new cracks with a pencil mark and date.
Related Problems
Diagonal cracks appearing around windows and doors, doors sticking, and visible sinking on one side of the building.
The mortar between bricks is cracking, crumbling, or falling out, leaving gaps in the brickwork.
An exterior or interior wall that bulges or leans outward, visible when looking along its length.
Cracks visible in the foundation walls or signs of foundation movement such as doors sticking and walls cracking.
Other Builder Problems
An exterior or interior wall that bulges or leans outward, visible when looking along its length.
Diagonal cracks appearing around windows and doors, doors sticking, and visible sinking on one side of the building.
The mortar between bricks is cracking, crumbling, or falling out, leaving gaps in the brickwork.
Damp patches appearing on inside walls, particularly after rain, often with a musty smell.