Third Surveyor Party Wall

Under the Party Wall etc. Act 1996, a third surveyor may be appointed to help resolve disagreements between two appointed party wall surveyors. This is an important safeguard within the legislation and helps ensure disputes are resolved professionally without needing court involvement.

This guide explains the role of the third surveyor, when they become involved and how they help the party wall process work effectively. Bloomsbury Surveyors advises clients across Brighton, Hove and Sussex on all aspects of the party wall process.

For a general overview of the legislation, visit our Party Wall Act Explained page.

What Is a Third Surveyor?

When two party wall surveyors are appointed, the Act requires them to select a third surveyor at the start of the process. The third surveyor acts as an independent professional who can step in if the two surveyors cannot agree on a matter.

The third surveyor does not normally become actively involved unless a disagreement arises. However, their appointment ensures there is always a clear route to resolve technical or procedural differences.

Why the Third Surveyor Exists

The role exists to prevent deadlock between surveyors. Without this mechanism, disagreements might otherwise lead to delays or legal action.

The third surveyor provides:

• An independent professional opinion
• A mechanism for resolving disagreements
• A binding determination where needed
• A way to avoid court proceedings in most cases

This helps keep the party wall process structured and efficient.

When Does the Third Surveyor Become Involved?

The third surveyor normally only becomes involved if the two appointed surveyors cannot agree on a particular issue. This might involve technical matters, procedural issues or questions relating to the Party Wall Award.

Common situations where the third surveyor may become involved include:

• Disagreement about protective measures
• Disputes about access arrangements
• Technical disagreements about structural risk
• Disputes about damage claims
• Interpretation of award provisions

You can read more on our Party Wall Dispute Resolution Brighton page.

How the Third Surveyor Is Appointed

When two surveyors are appointed, they must agree on the identity of the third surveyor at the start of the process. This ensures the appointment is already in place if needed later.

The third surveyor must be independent and suitably experienced in party wall matters.

What Powers Does the Third Surveyor Have?

The third surveyor has the authority to make a determination on matters referred to them by either of the appointed surveyors. Their decision is normally binding within the framework of the Act.

This authority helps ensure that the process can move forward even if the original surveyors disagree.

Does the Third Surveyor Replace the Other Surveyors?

No. The third surveyor does not replace the original surveyors. Their role is limited to determining specific matters that have been referred to them.

Once the issue is resolved, the original surveyors usually continue with the process.

Who Pays the Third Surveyor?

The costs of the third surveyor are usually allocated as part of the party wall process. In many cases, the building owner pays reasonable costs, although the final position depends on the circumstances and the determination made.

Costs are typically addressed within the Party Wall Award.

Read more on our Party Wall Award Explained page.

How Often Is the Third Surveyor Needed?

In many cases, the third surveyor is never required to become actively involved because the appointed surveyors are able to reach agreement. However, the presence of the third surveyor provides an important safeguard that helps maintain professionalism within the process.

Why the Third Surveyor Is Important

The third surveyor plays an important role in maintaining confidence in the party wall system. Their presence helps ensure disagreements can be resolved professionally without unnecessary escalation.

This helps:

• Maintain fairness
• Resolve technical disagreements
• Prevent delays
• Avoid unnecessary legal costs
• Support a structured dispute process

How Bloomsbury Surveyors Can Help

Bloomsbury Surveyors advises clients on all aspects of the party wall process including surveyor appointments, awards and dispute resolution. We work with building owners and adjoining owners across Brighton, Hove and Sussex.

Our aim is to provide clear, professional advice that helps maintain a fair and efficient process.

Related Party Wall Pages

• Party Wall Surveyor Brighton
• Role of Party Wall Surveyor
• Party Wall Dispute Resolution Brighton
• Party Wall Award Explained
• Party Wall Surveyors Disagree
• Party Wall FAQs

Frequently Asked Questions

Is a third surveyor always required?

Yes, where two surveyors are appointed, a third surveyor must be selected in case they are needed.

Does the third surveyor always get involved?

No. They usually only become involved if the two appointed surveyors cannot agree.

Is the third surveyor independent?

Yes. The third surveyor must act independently and impartially.

Can either surveyor refer a matter to the third surveyor?

Yes. Either appointed surveyor can refer a dispute to the third surveyor.

Do you deal with third surveyor matters in Brighton?

Yes. We advise clients across Brighton, Hove and Sussex on all party wall surveyor roles.