How Long Does a Drain Survey Take?

One of the first questions people ask when booking a drain survey is “how long will it take?” The answer depends on several factors, but here is a practical guide to what you can expect.

On-Site Survey Time

The actual time spent at your property surveying the drains varies based on the size and complexity of your drainage system:

Small Properties (2-Bedroom Terraced House)

Estimated time: 1 to 1.5 hours

A small terraced house typically has a single main drain run from the back of the property to the public sewer connection. The survey engineer will:

1. Locate the manhole covers (5 minutes).
2. Gain access and set up the camera equipment (10 minutes).
3. Push the camera through the drain (10–15 minutes depending on the length of the run).
4. Review the footage and note findings (5 minutes).
5. Give you a verbal summary (10 minutes).

The actual time depends on:

• How easily manhole covers are accessed. If they are buried under soil, covered with paving, or stiff from disuse, locating and opening them takes longer.
• The length of the drain run. A small terrace with a 10-metre drain is quicker than one with a 20-metre run.
• Whether the drain is partially blocked. A blockage slows the camera passage.

Medium Properties (3-4 Bedroom Semi or Detached)

Estimated time: 1.5 to 2.5 hours

A larger semi or detached house may have multiple drain runs — separate foul and surface water systems, or branches serving extensions or outbuildings. Each run needs a separate camera insertion.

• First run: 20–30 minutes.
• Second run: 20–30 minutes.
• Third run (if present): 15–20 minutes.
• Verbal summary and site notes: 15 minutes.

Total: 1.5 to 2.5 hours depending on access difficulty and the number of runs.

Large Properties or Complex Layouts

Estimated time: 2.5 to 4 hours

A large detached property, a property with a significant extension, or a property with multiple drainage systems (foul, surface water, separate kitchen drain) can take significantly longer.

Examples:

• A large Victorian villa with separate foul and surface water, an extension with its own drain, and outbuildings could have 4–5 distinct drain runs.
• Multiple runs mean multiple camera insertions, each taking 20–30 minutes.
• Older properties sometimes have abandoned drains that need to be surveyed and classified.

A complex property might take 3–4 hours, especially if there are access difficulties.

Commercial Properties

Estimated time: 2 to 6 hours

Commercial properties are significantly more complex and time-consuming:

• A small retail unit: 1.5 to 2 hours.
• A medium office or restaurant: 2 to 4 hours.
• A large building with multiple floors and multiple systems: 4 to 6 hours or more.

Commercial surveys involve additional testing (water pressure testing, infiltration testing) and more detailed documentation, which extends the on-site time.

What Affects On-Site Duration?

Several factors can make a survey faster or slower than average:

Access to Manhole Covers

If manhole covers are:

• Easily accessible: The survey is quick. Located in concrete or paving in the garden or drive, the engineer can quickly locate, open, and access them.
• Difficult to access: Takes longer. Buried under soil, hidden under decking or a patio, or covered with vegetation all require time to locate and expose.
• Missing or inaccessible: Sometimes a manhole cover is missing or too damaged to open. The engineer may need to use an alternative entry point (a rodding point, or inserting the camera through the soil stack). This adds time.

Blockages in the Drain

If the drain has a partial or complete blockage, the camera cannot pass through. The engineer will:

1. Try to push through gently with the camera.
2. If this fails, withdraw and report that the drain is blocked.
3. You will need a drain clearance before the full survey can be completed.

A partial blockage might be pushed through, taking an extra 10–15 minutes. A complete blockage stops the survey at that point.

Weather

Heavy rain can affect survey timing:

• A flooded property with water levels in the drains makes access unsafe. The survey may be postponed.
• Wet ground makes access more difficult and muddy.
• Generally, dry weather is preferable, but a survey can be conducted in moderate rain.

Property Age and Condition

Older properties with more complex drainage layouts take longer. A Victorian property with combined foul and surface water, brick barrel drains, and modified systems is more complex than a modern property with straightforward PVC.

Number of People Present

If you want to watch the survey and ask questions, the engineer will take time to explain findings and show you footage. If they survey without your presence, it is slightly quicker.

Report Turnaround Time

The on-site survey is only the first part. The engineer then needs to review the footage, write the report, and produce the documentation.

Standard Report Turnaround: 5-10 Working Days

A typical drain survey report — with video footage reviewed, defects identified, images annotated, and a written report produced — usually takes 5–10 working days to complete.

This timeline allows the surveying company to:

1. Download and review the HD footage (1–2 days).
2. Identify and classify defects using the industry grading system (1–2 days).
3. Capture and annotate still images (1 day).
4. Write the report and prepare the drainage plan (2–3 days).
5. Proof and quality-check (1 day).

Expedited Reports: 48 Hours

Some companies offer expedited reports in 48 hours. This typically costs a premium (£50–£150 extra) and is useful if you are about to exchange contracts on a property purchase.

An expedited report usually includes the key findings and images but may have less detailed annotation or explanation than a full report completed at the normal pace.

Slow Reports: 2-3 Weeks

Some operators take 2–3 weeks to produce reports, particularly if they are busy or have a backlog. This is not unreasonable, but it is worth confirming the turnaround time when booking.

For homebuyers and insurance claims, a 5–10 day turnaround is usually adequate. If you need a report urgently, confirm the expedited option when booking.

Total Timeline from Booking to Receiving Report

Here is the typical timeline from the moment you decide to book a survey to receiving the final report:

Scenario 1: Standard Booking

• Days 1–3: Find a surveying company, get a quote, book a convenient date.
• Days 4–10: Wait for the appointment (depends on company availability; many can survey within a week of booking).
• Day 11: Survey conducted (on-site time: 1–2 hours for most residential properties).
• Days 12–21: Report written and delivered (typically 5–10 working days).

Total time: 3–4 weeks from initial booking to receiving the report.

Scenario 2: Urgent Booking (Before Property Exchange)

• Day 1: Find a surveying company, request urgent booking.
• Day 2 or 3: Survey conducted (many companies can arrange urgent surveys within 24–48 hours if you push).
• Days 4–5: Expedited report delivered (48-hour option if you pay the premium).

Total time: 4–5 days from booking to receiving the report.

This is feasible if you are buying a property and reach the point of needing a survey urgently. However, you need to plan ahead and book quickly.

Scenario 3: Commercial or Complex Survey

• Days 1–5: Find a company specialising in commercial surveys, negotiate scope and scheduling.
• Days 6–20: Wait for appointment (commercial surveys may take longer to schedule due to the need for after-hours or weekend access).
• Days 21–25: On-site survey (2–6 hours depending on complexity).
• Days 26–40: Detailed report completed (10–15 working days for a complex commercial survey).

Total time: 5–8 weeks from initial inquiry to receiving the report.

When to Book Your Survey

If you are buying a property and want a survey before exchange:

1. Book the survey as soon as your offer is accepted. Do not wait for the house survey results or searches to complete.
2. Request a date within 1–2 weeks of booking. This gives the company time to fit you in without huge delay.
3. If you are close to exchange, request an expedited report (48-hour option) when booking.

The whole process from accepted offer to receiving a survey report can be completed in 2–3 weeks if you prioritise it. This keeps you well ahead of exchange deadlines (typically 6–8 weeks after offer acceptance).

Do You Need to Be Present?

You do not need to be present during the survey. The engineer can access the property and conduct the survey without you. This is actually preferred by some surveyors because it makes the job quicker and more professional.

However, many property owners like to watch the survey — it gives you a chance to understand the findings in real time and ask questions.

If you do attend:

• Plan for 1–2 hours, plus any additional time if the engineer needs to explain findings in detail.
• Ensure someone is available to provide access and answer basic questions about the property.
• Have a cup of tea ready — surveyors appreciate it!

Property Access Arrangements

For the survey to happen, you need to ensure the property is accessible:

• If you own the property: You need to arrange access. Unlock the back garden if necessary.
• If you are buying: Coordinate with the estate agent to arrange access. The agent can usually meet the engineer or provide a key.
• If the property is empty: Keys can be collected from the estate agent or a keyholder.
• If you are a landlord arranging a survey on a rental property: Give the tenant reasonable notice (usually 24 hours minimum) and ensure the engineer has access.

A lack of access to manhole covers or back gardens delays the survey. Confirm that all areas will be accessible before booking.

The Bottom Line

A typical residential drain survey takes 1–2.5 hours on-site, depending on the property size and complexity. The written report takes another 5–10 working days. Total time from booking to having the report in hand is typically 2–4 weeks.

If you need a survey urgently (before property exchange, for example), expedited options can compress the timeline to 4–5 days from booking to report delivery, though you will pay a premium.

Ready to book a survey? Get in touch — we can usually arrange surveys within a few days of booking, with standard reports delivered within 5–10 working days, or expedited reports in 48 hours if urgently needed.