An old CCTV system failing does not automatically mean the building needs rewiring. In a large share of the upgrades we do, most of the existing cable is reusable, and the cost of a full rewire is avoidable - but knowing which case you are in needs an actual inspection, not an assumption either way.
What decides whether your existing cable is reusable
The deciding factors are the cable type, its physical condition, and the run length. Older coaxial cable used for analogue systems can often carry a modern signal over reasonable distances without replacement. What actually rules cable out is physical damage - corrosion at connectors, water ingress, rodent damage - or a run length that has degraded the signal beyond what the new equipment can compensate for. An inspection tests the existing runs rather than assuming their age alone disqualifies them.
Hybrid recorders: the practical bridge
Modern hybrid recorders accept both older analogue-style cameras over existing coaxial cable and newer IP cameras over network cable on the same unit. This is what makes a phased upgrade realistic: you can replace ageing cameras with modern ones on the existing cable runs, add new IP cameras on fresh cable only where you are genuinely expanding coverage, and run both on a single recorder rather than needing two separate systems during a transition.
What genuinely needs new cable, and what does not
- Reusable, typically: coaxial runs in good physical condition, particularly shorter runs within a floor or a compact building.
- Needs new cable, typically: any run with visible damage or corrosion, any position genuinely new to the system, and any run where you are moving to a camera type the existing cable cannot support at all.
- Worth checking case by case: long runs where signal quality is borderline - sometimes a signal booster or a repositioned recorder solves what looks at first like a cable problem.
Phasing an upgrade camera by camera
A practical phased upgrade replaces the recorder first, sized for the full eventual camera count even if not all channels are used immediately, then swaps cameras onto existing cable where it tests good, then adds new cable only for genuinely new positions or runs that failed inspection. This spreads the cost over time and means the system is never offline for longer than a single camera swap, rather than the building losing coverage for a full rewire.
When rewiring is honestly the better answer
Sometimes it genuinely is. If most of the existing cable fails inspection, if the building is being renovated anyway and walls are already open, or if you are moving to a camera count and layout different enough that the old cable routes no longer make sense, a fresh install can end up cheaper and more reliable than patching around old infrastructure. We will tell you this directly if it is what the inspection shows, rather than forcing a hybrid approach onto a system where it does not actually fit.
Common questions
How do we know if our existing cable is actually still good?
It needs a physical inspection and a signal test, not a guess based on age alone - cable that looks old can test fine, and cable that looks fine can have failed connectors or water damage you cannot see from outside. We test existing runs as part of any upgrade survey before recommending reuse or replacement.
Will a hybrid system look and perform differently camera to camera?
There can be a visible difference in image quality between an older camera on existing cable and a new camera you install alongside it, though a properly chosen upgrade minimises this. We will show you the expected difference before you commit to a phased approach, so it is a decision, not a surprise.
Is a phased upgrade actually cheaper than a full rewire in the end?
Usually, yes, when a meaningful share of the existing cable tests reusable - you avoid the labour cost of running new cable throughout the building. If inspection shows most cable has failed, the math can flip, which is exactly why the inspection happens before any commitment, not after.