Professional Surveying Services
Welcome to David Cosby Chartered Surveyors
We are a firm of Chartered Land Surveyors, Building Surveyors, and Registered Valuers, regulated by the Royal Institution of Chartered Surveyors (RICS)
Commercial Property Surveys
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RICS Home Survey Reports & Valuations
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Land Surveying
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Measured Building Surveys
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Probate Valuations
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Land Registry Compliant Plans
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Regulated by the Royal Institution of Chartered Surveyors (RICS)
Our surveying services are conducted by qualified professionals who adhere to the strict standards and ethical guidelines set by the Royal Institution of Chartered Surveyors (RICS)

Your Local Property Professionals
From our base in South Northamptonshire, David Cosby Chartered Surveyors offer informed local insight alongside nationwide surveying services. With specialist land and building surveying expertise, we provide dependable, up-to-date guidance on all aspects of land and property.
Latest News and Projects
Renters’ Rights Act: What It Means for the Market
The forthcoming Renters’ Rights Act will bring major changes to the private rental sector, including the removal of Section 21 notices and new limits on rent reviews. Early signs suggest some landlords may consider selling ahead of implementation.
Historic Carpenters’ Marks Found at a Georgian Mill House, Brackley
While surveying a late eighteenth-century mill house in Brackley, we uncovered original carpenters’ marks on the roof trusses — Roman numerals cut into the oak that reveal how Georgian roof frames were set out, assembled, and raised with remarkable accuracy.
Dry Rot in Action
During a recent survey of a Grade II Listed property, we encountered an active outbreak of dry rot within the basement. The fungus had formed extensive mycelium and a distinct rhizomorph “feeding strand” between timber stacks — a striking demonstration of how opportunistic and dynamic timber-decay fungi can be when the conditions are right.






