Property survey guide

Which house survey do I need?

The right survey depends on the property’s age, condition, construction and your plans for it. A Level 2 survey suits many conventional homes; a Level 3 Building Survey is usually better for older, altered or higher-risk properties.

Last reviewed: August 2026

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Quick answer

If you are buying a conventional property in reasonable condition, a Level 2 Home Survey may be appropriate. If it is old, unusual, extended, listed, visibly neglected or you are planning major work, consider a Level 3 Building Survey.

A mortgage valuation is not a substitute for either type of survey.

Survey types compared

Survey type	Best for	What it does
Level 1 Condition Report	Newer, conventional homes where you want a basic overview.	Highlights the property’s condition using a simple traffic-light style rating.
Level 2 Home Survey	Conventional properties in reasonable condition.	Identifies significant visible defects and risks, with advice on what may need attention.
Level 3 Building Survey	Older, larger, unusual, altered or visibly neglected properties.	Provides a more detailed inspection and explanation of defects, risks and likely next steps.

When is a Level 2 survey suitable?

A Level 2 Home Survey is often suitable when the property is of conventional construction, appears reasonably maintained, and has not been extensively altered.

A Level 2 survey may be a good fit if the property is:

A modern or relatively conventional house or flat.
In apparently reasonable condition.
Not listed, unusually constructed or significantly altered.
Not showing obvious signs of major damp, cracking or structural movement.

When should I choose a Level 3 Building Survey?

A Level 3 Building Survey is usually worth considering where the property has more potential risk or where you need a more detailed understanding before committing to the purchase.

Consider a Level 3 survey if the property is:

Older, particularly a period property.
Listed, non-standard or of unusual construction.
Extended, converted or substantially altered.
In visibly poor condition or showing signs of damp, cracking or roof problems.
Large, expensive or likely to need renovation.
Being bought with plans for major building work.

A Level 3 survey can cost more than a Level 2 survey, but the extra detail may help you decide whether to proceed, seek specialist advice, renegotiate or budget for repairs.

Is a mortgage valuation enough?

No. A mortgage valuation is commissioned for the lender and is mainly intended to confirm whether the property provides suitable security for the mortgage. It may be brief and does not give you the same protection as an independent condition survey.

How to choose the right survey

Consider the property’s age, condition, construction and history.
Think about concerns raised during your viewing or in the estate-agent details.
Be clear about any renovation, extension or conversion plans.
Ask a surveyor which level they recommend and why.
Get written quotes that clearly state the survey level and scope.
Check qualifications, insurance, availability and report turnaround time.

Choosing a house survey: FAQs

Do I need a survey for a new-build property?

New-build homes can still have defects. Depending on your needs, you may consider a survey, a snagging inspection or both. Ask a qualified professional which service best fits the property and timing.

What is the difference between a Level 2 and Level 3 survey?

A Level 3 survey is more detailed and is generally intended for properties with more potential risk, complexity or visible concerns. A Level 2 survey is often suitable for conventional homes in reasonable condition.

Can a surveyor tell me how much repairs will cost?

A report may explain defects and recommend further investigation. Whether repair-cost guidance is included depends on the survey type, scope and agreement with the surveyor.

When should I arrange a survey?

Arrange it after your offer is accepted and before contracts are exchanged, leaving enough time to receive the report and consider any issues raised.