Overview
The Crane House is an early 20th-century non-traditional house type designed by Alderman Crane and constructed between 1925 and 1926. Around 400 examples were built, primarily as detached and semi-detached single-storey bungalows, most commonly located in suburban settings associated with post-First World War housing expansion.
These properties reflect the period’s focus on efficiency, affordability, and emerging construction techniques, combining steel framing with concrete blockwork and asbestos-based components.
Crane Houses were built using a steel structural frame with hollow clinker concrete block external walls and asbestos cement roof coverings. They are single-storey bungalows and are not classed as defective under the Defective Premises Act.
Typical characteristics & construction
Crane Houses are single-storey bungalows constructed on concrete raft foundations thickened at the perimeter. A damp-proof course is incorporated to reduce the risk of rising moisture.
The primary structure comprises rolled steel angle (RSA) and rolled steel tee (RST) stanchions and trusses, protected with a red oxide coating. External walls are formed from roughcast rendered hollow clinker concrete blocks, fair-faced internally.
Roofs are steeply pitched and hipped, finished with asbestos cement pantiles over bituminous felt and timber battens. Steel-framed windows with PS surrounds and recessed porches are typical identifying features.
| Element | Typical construction | Inspection focus |
|---|---|---|
| Substructure | Concrete raft foundation with DPC | Settlement, moisture transfer, edge cracking |
| Frame | RSA and RST steel stanchions and trusses | Corrosion, protective coating condition |
| External walls | Hollow clinker concrete blocks with roughcast render | Cracking, spalling, moisture ingress |
| Roof | Asbestos cement pantiles on timber battens | Tile cracking, felt condition, water ingress |
| Ceilings | Asbestos cement panels on RST grid | Damage, disturbance, asbestos condition |
Potential hazards & inspection priorities
The most significant risks associated with Crane Houses relate to asbestos-containing materials and corrosion of the steel frame. Asbestos is commonly present within roof coverings, ceiling panels, and profiled sheets within the roof space.
Minor corrosion to steel stanchions, particularly at their bases, and superficial corrosion to roof trusses are commonly encountered. Cracking to render, clinker blocks, floor screeds, skirtings, window sills, and cast iron flue pipes is also a recurring issue.
Spalling of clinker partition blocks may occur where moisture penetration or long-term deterioration is present.
Is this house right for you?
Crane Houses require a purchaser who understands non-traditional construction and is prepared to manage asbestos-containing materials and steel frame maintenance.
- Commission a full building survey
- Obtain an asbestos survey where appropriate
- Budget for ongoing maintenance rather than cosmetic upgrades
Mortgage & resale considerations
Although Crane Houses are not classed as defective, lender acceptance is influenced by condition, asbestos management, and clarity of survey reporting. Documentation confirming maintenance and the absence of significant unresolved corrosion is often critical.
What a survey can — and cannot — tell you
A building survey provides an informed assessment of the visible condition and construction of a Crane House. Inspections are non-intrusive and limited to areas that are accessible at the time of inspection.
- Identify visible cracking to render and clinker blockwork
- Assess signs of dampness, moisture ingress, and condensation risk
- Comment on roof coverings, drainage details, and external envelope condition
- Review the condition of accessible steel frame elements
- Highlight defects requiring repair, monitoring, or further investigation
However, there are limitations to what a survey can determine without intrusive investigation.
- Confirm the condition of concealed steel sections
- Assess hidden asbestos-containing materials
- Determine the extent of corrosion behind finishes
- Inspect inaccessible or covered areas
Where higher-risk indicators are identified, further specialist or intrusive investigation may be recommended.
For a thorough building survey in Greater London, an instant quotation can be obtained through the online survey calculator.
Considering a Crane House?
A detailed building survey can help clarify construction-specific risks before committing to a purchase.
Get your instant survey quoteDisclaimer: This article is provided for general educational purposes only and is based on industry research, professional knowledge, and experience. It does not relate to any specific property and should not be relied upon when making a purchasing decision. Prospective purchasers should always commission an independent RICS-qualified surveyor to conduct a full inspection and provide a report on the actual condition of any property of interest.
