A CCTV drain inspection is the only way to know with certainty what condition your underground pipes are in. But how often you actually need one depends on the type of property, the age and material of the pipes, the drain history, and what’s happened since the last inspection. This guide gives you a practical schedule for every property type on the Central Coast.
The quick answer
For a residential property with older clay or AC cement pipes and no recent drain work, a CCTV inspection every 5-7 years is appropriate. Properties that have been relined can extend to 10 years. Investment properties and holiday rentals warrant inspection every 3-5 years. Commercial food premises should inspect drain lines annually. Properties that have had a blockage event or are being purchased/sold should have an inspection regardless of the schedule.
The baseline: why drain inspection schedules matter
Underground drain pipes are the one piece of infrastructure that most property owners never see. Unlike a roof (visible from the ground) or walls (visible during renovation), drain pipes can deteriorate from good to critical without any external sign, until a blockage, back-surge or sewer gas event makes the problem impossible to ignore.
A CCTV inspection at an appropriate interval:
- Catches deterioration before it becomes an emergency
- Documents pipe condition at a point in time (useful for insurance, resale)
- Confirms that previous relining is holding correctly
- Identifies root intrusion before it blocks completely
The inspection cost ($250, $500) is minimal compared to the emergency call-out cost of a failure event ($400, $1,500) or the consequential costs of sewage damage.
Schedule by property type
Owner-occupied residential, older home (pre-1985)
Pipe materials: AC cement or terracotta (clay). These pipes are now 40-70+ years old.
| Situation | Recommended frequency |
|---|---|
| No CCTV history, no known drain issues | Inspect now, then every 5 years |
| Previous CCTV, moderate defects found | Every 3 years until defects remediated |
| Post drain relining | Every 10 years |
| Established large trees near drain line | Every 3-5 years (root monitoring) |
| After a blockage event | Inspect immediately after clearing |
Central Coast relevance: Most pre-1985 homes in Gosford, Wyong, East Gosford and North Gosford fall into this category. A CCTV inspection that shows moderate defects but no current blockage gives you the lead time to plan relining without emergency pressure.
Owner-occupied residential, newer home (post-1990)
Pipe materials: PVC. Generally in better condition, but not immune to root intrusion, incorrect installation or damage from renovations.
| Situation | Recommended frequency |
|---|---|
| No drainage symptoms, no tree pressure | Every 10 years |
| Large trees established near drain line | Every 5 years |
| After renovation affecting drainage | Inspect post-renovation to confirm no damage |
| After a blockage or slow drain event | Inspect to confirm cause |
Investment property (residential tenancy)
Investment properties have tenants who may not report drain problems promptly. Early detection of developing issues is more valuable here.
| Situation | Recommended frequency |
|---|---|
| Pre-1985 property, original pipes | Every 3 years |
| Post-1990 property, PVC pipes | Every 5-7 years |
| Post drain relining | Every 7-10 years |
| New tenant taking occupation | Consider inspection as part of the changeover |
| After tenant reports blockage | Inspect after clearing |
Investment property note: Many landlords make the mistake of only responding to drain problems rather than inspecting proactively. A CCTV inspection every 3 years on an older investment property is far cheaper than one after-hours emergency per year plus a reactive reline under pressure.
See our drain relining for investment properties guide for the full financial case.
Holiday rental / short-term rental
Holiday rentals have high-intensity peak use and extended idle periods, both of which create drain risk.
| Situation | Recommended frequency |
|---|---|
| Pre-1985 coastal property | Every 2-3 years |
| Post-1990 property | Every 3-5 years |
| Post drain relining | Every 7 years |
| Before listing a newly acquired property | Inspect before first guests |
| After a guest reports a drain event | Inspect immediately after clearing |
Central Coast holiday rental note: Properties at Avoca Beach, Terrigal, Umina and Woy Woy are particularly at risk given the combination of older pipes, coastal root pressure and high seasonal use. We cover this in detail in our holiday rental drain relining guide.
Commercial food premises (café, restaurant, takeaway)
Commercial kitchens have grease loads, high volumes and regulatory obligations that make drain inspection critical.
| Situation | Recommended frequency |
|---|---|
| Kitchen drain lines (grease-affected) | Annually |
| Main sewer from premises to street | Every 2-3 years |
| Post drain relining | Every 3-5 years |
| Before renewing a food business licence | Inspect to confirm drainage compliance |
| After a back-surge or overflow event | Inspect immediately |
For commercial premises, drain inspection is not just good practice, it’s part of managing regulatory risk. A blocked drain during a health inspection is a significant compliance problem.
Commercial property (non-food)
| Situation | Recommended frequency |
|---|---|
| General commercial premises | Every 5 years |
| Premises with large tree planting | Every 3 years |
| Post drain relining | Every 7-10 years |
| Pre-sale or change of tenant | Inspect for due diligence |
Pre-purchase inspection
This is the most important single inspection category. A pre-purchase CCTV inspection is strongly recommended for any property that:
- Was built before 1990
- Is on the Central Coast (older pipe stock)
- Has large trees in the garden
- Has not had documented drain work in the last 10 years
The inspection should occur before exchange or within the cooling-off period. Cost: $300, $500. Potential saving: $3,500, $9,000 in immediate post-purchase relining costs if defects are found and negotiated.
See our pre-purchase CCTV inspection guide.
When to book a CCTV inspection regardless of schedule
Certain events should trigger an unscheduled inspection:
| Trigger event | Why inspect |
|---|---|
| Blocked drain cleared (recurring) | Understand structural cause, not just symptom |
| Sewage odour from yard or inside house | Possible cracked pipe, locate and assess |
| Wet patch in garden with no fixture leak | Possible sewer exfiltration |
| Purchase of older property | Baseline condition documentation |
| Major tree removal near drain line | Check for root damage or voids |
| Post-relining warranty issue | Independent verification of liner condition |
| After excavation near drain line | Confirm no damage to pipe |
| Surface subsidence near drain line | Possible void from exfiltrating pipe |
What happens in a CCTV inspection
The camera system consists of a crawler camera attached to a push rod or self-propelling unit, fed through the pipe from an inspection shaft or toilet pan access. Modern systems include:
- HD colour camera
- Built-in inclinometer (gradient measurement)
- Distance counter (defect location by chainage)
- Lighting for clear footage in dark pipes
A written report with footage is provided after the inspection. The report classifies defects and provides recommended actions. See our CCTV drain inspection report explained guide.
Scheduling a CCTV inspection on the Central Coast
Availability on the Central Coast varies by season. Summer is the busiest period for emergency drain work. To avoid delays:
- Schedule routine inspections in autumn (March, May) or early winter (June, July)
- Allow 1-2 weeks lead time for residential scheduled inspections
- Emergency CCTV is typically available within 24 hours
Cost of CCTV inspection on the Central Coast (2026)
| Inspection type | Typical price |
|---|---|
| Basic residential CCTV | $250, $400 |
| Full inspection with report | $300, $500 |
| Pre-purchase inspection (with buyer report) | $300, $500 |
| Combined sewer + stormwater | $400, $700 |
| Commercial inspection | $400, $1,000 |
| Post-reline verification | $250, $450 |
Frequently asked questions
Do I need a CCTV inspection if I’ve had no drain problems? For older properties (pre-1985) on the Central Coast, yes. Root intrusion and joint deterioration are silent until they cause a blockage. An inspection gives you advance knowledge and lets you plan relining on your schedule rather than in an emergency.
Can I schedule CCTV and relining in the same visit? If the contractor has reviewed CCTV footage and confirmed the pipe is suitable for relining (clear bore, appropriate access), the jetting and liner installation can sometimes follow the same day as the inspection. More typically, the inspection is scheduled separately to allow proper report preparation and quote development.
How long does a residential CCTV inspection take? For a standard residential sewer main (15-20 m), typically 1-2 hours including set-up, camera run and basic footage review. A more detailed inspection covering multiple pipes takes 2-4 hours.
Is CCTV inspection covered by my home insurance? Generally no, it’s a maintenance service, not an insured event. However, if a known pipe failure has caused insured damage, the insurer may require a drain inspection as part of the claim assessment.
What if the CCTV shows my pipes are in good condition? Great news, you now have documented evidence and a timeline for the next inspection. File the report with your property records and schedule the next inspection on the appropriate interval.
Ready to know what’s going on inside your Central Coast drains? Book a CCTV inspection.