MET SURVEYORS

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Basement Impact Assessment (BIA Survey) Services by Met Surveyors

At Met Surveyors, we specialise in delivering expert Basement Impact Assessments (BIA surveys) for residential and commercial developments across London and the South East. If you're planning a basement construction or extension, a professionally prepared BIA survey is essential for securing planning approval and ensuring your project proceeds safely and compliantly.

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What Is a Basement Impact Assessment?

A Basement Impact Assessment is a comprehensive technical report that evaluates how a proposed basement development could affect the structural integrity of nearby properties, drainage systems, and the local ground conditions. Most local planning authorities in London now require a BIA survey as part of any planning application involving excavation or basement construction.

Typical considerations in a BIA survey include:

• Ground movement and soil stability

• Proximity to adjacent structures and foundations

• Risk of flooding or groundwater displacement

• Proposed construction methodology

• Impact on trees, utilities, and public infrastructure

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Why You Need a BIA Survey

A BIA survey is not only a planning requirement in many London boroughs—it is also a key safeguard for managing risk throughout your project. Whether you're a homeowner, architect, or developer, a basement impact assessment helps you:

• Address planning policy requirements

• Avoid costly delays or objections

• Reduce structural risks to neighbouring properties

• Identify environmental and drainage considerations early

• Demonstrate responsible and informed design practices

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Our Expertise at Met Surveyors

Met Surveyors has a strong track record of producing clear, accurate, and council-compliant basement impact assessments. Our team collaborates with structural engineers, geotechnical consultants, and planning professionals to ensure every BIA survey meets the expectations of local authorities such as Camden, Kensington & Chelsea, Westminster, Islington, and beyond.

We offer a complete BIA service, including:

• Initial site review and feasibility assessment

• Desktop study of geology, hydrology, and existing infrastructure

• Coordination with your design and engineering teams

• Risk analysis and mitigation strategies

• Full BIA report preparation for submission

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Supporting Planning Success

We understand the unique demands of basement developments in high-density urban environments. With our knowledge of local planning policies and technical requirements, Met Surveyors is your trusted partner in navigating the basement planning process confidently.

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Request a Basement Impact Assessment Today

If you're planning a basement project and need a professionally prepared BIA survey, contact Met Surveyors today. We’ll guide you through the process and deliver a tailored basement impact assessment that supports your planning application and protects your investment.

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If you're still not quite sure about what you want or if you need advice you can Book a Callback Consultation Here