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
Spray Foam Insulation | A Growing Problem for UK Homeowners
Spray foam insulation has become a popular choice for improving energy efficiency in UK homes, but its widespread use has also revealed significant challenges. From trapped moisture to mortgage refusals and insurance complications, homeowners are finding that spray foam is not always the straightforward solution it appears to be. This article explores the risks, examines government schemes like the Green Homes Grant, and offers practical advice for navigating these issues, particularly for owners of period properties
Do I Need a RICS Red Book Valuation for Probate?
Understanding whether a probate estate requires a RICS Red Book valuation or an estate agent’s appraisal is essential. This guide explains the differences, when a formal valuation is advisable, and how each affects inheritance tax reporting.
How do we value your home? The Comparable Method Explained
What Is the Comparable Method of Valuation?
The comparable method of valuation relies on the principle of substitution: buyers typically will not pay more for a property than they would for a similar one in the same market. We analyse data from recent sales of comparable properties to determine a realistic market value for your home.
This method works particularly well for residential properties, where we can access a wealth of data on similar homes in your area.






