Is movement normal in a Victorian terrace?

4 November 2026 · Blog · Buying a home

London’s Victorian and Edwardian terraces are some of the most sought-after homes in the city, and almost all of them have moved at some point in their 120-plus years. Most of that movement is historic and harmless. Some isn’t. Knowing the difference is what a structural report is for.

Why Victorian houses move
• Shallow foundations: many were built on brick footings only a little below ground, on London Clay that shrinks and swells with the seasons.
• Soft lime mortar: it lets walls flex and settle without failing, which is good, but it means some distortion is normal.
• Bay windows: often built on even shallower foundations than the main house, so they move on their own.
• Alterations: removed chimney breasts, knocked-through walls and new openings can all leave the structure under-supported.
• Roof spread: when roof timbers push outwards, the tops of the walls can bow.

Normal signs of age
• Slightly sloping floors and out-of-square door frames
• Old, stable cracks that have been filled and decorated over
• Slight leaning or bowing that hasn’t changed in decades

Signs that need a closer look
• New or growing cracks, especially diagonal ones above openings
• A bay window pulling away from the main wall
• Bulging or bowing walls, particularly at first floor or roof level
• Chimney breasts removed below but not above, with no sign of support
• Cracking near large trees or leaking drains

How we help
We look at what has moved, how much, why, and whether it’s still moving, and tell you in plain English whether it’s typical of the age of the house or something you need to deal with before you buy. We see Victorian terraces every week across London, from Islington to Clapham to Twickenham.

Common question

The survey says “movement consistent with age”. Do I need an engineer?
Not always. But if the surveyor also says “refer to a structural engineer”, or you’re planning to knock through or extend, it’s worth getting a clear answer first.

Book a pre-purchase structural report →
Site visit within 3 working days · report within 48 hours · get in touch or call 020 3835 2633

More for home buyers
• My RICS survey says “refer to a structural engineer”
• Should I buy a house with cracks or subsidence?
• Buying a house where a wall was removed without approval
• My lender wants a structural engineer’s report
• How quickly can I get a structural report before exchange?
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Structural engineer or RICS surveyor? →