Choosing the right number of security cameras for your home or business is one of the most common questions Kiwi buyers face. Too few and you have blind spots; too many and you're paying for cameras that add little protection. The answer depends on your property size, layout, camera type, and the brands you're working with. This guide breaks down the key factors - and matches each scenario to the brands available at Tech Supply Shed NZ - so you can make a confident, practical decision.

Start With Your Property Layout

The single biggest factor in determining camera count is the size and shape of your property. A standard NZ residential section typically needs 4-6 cameras to achieve solid coverage. A larger lifestyle block or commercial premises will need more. Start by sketching a rough floor plan and marking every entry and exit point - these are your non-negotiable camera positions.

Key coverage zones to always prioritise:

• Front door - the most common entry point for intruders
• Back door and side gates - frequently overlooked blind spots
• Garage and driveway - vehicle theft and package theft are common
• Backyard and deck - especially important for properties backing onto reserves or laneways
• Indoor entry points - hallway, lounge, or main living areas if indoor cameras are used

Camera Count by Property Type

Apartment or unit (1-2 cameras): A single front door camera plus one covering the main living area or carpark is usually sufficient. A compact wireless camera like the eufy S350 Indoor Camera or the Arlo Essential 3rd Gen is ideal here - no complex wiring and easy to reposition.

Standard home, 3-4 bedroom (4-6 cameras): Cover the front door, back door, garage, driveway, and at least one side of the house. A 4-camera wireless kit or a wired PoE system is the most cost-effective starting point. The eufy EufyCam S4 2-Pack or the Arlo Essentials 2K 4-Pack are purpose-built for this use case - wireless, weatherproof, and easy to scale.

Large home or lifestyle block (6-10+ cameras): Multiple entry points, outbuildings, and long driveways all warrant additional coverage. A wired PoE system like the TVT D28C PoE 6MP Dome paired with a TVT NVR provides the reliability and image quality you need at this scale, without the WiFi dependency of wireless systems.

Small business or retail (6-16 cameras): Factor in all customer entry points, the counter and POS area, stockroom, loading dock, and carpark. Businesses with staff should also consider internal cameras for procedural compliance and liability protection. Swann's DVR and NVR systems are a strong fit here, offering multi-channel recording with local storage.

Wired vs Wireless: How It Affects Your Camera Count

Your camera system type directly impacts how many cameras are practical to install. Wired PoE systems - like the TVT D28C PoE dome range - are the right choice for larger installs. You're not fighting WiFi signal degradation or managing battery life across 8+ cameras. The trade-off is cable runs during installation, which is best planned during a build or renovation.

Wireless battery-powered cameras are far easier to add incrementally. Eufy and Arlo both lead this category in NZ. Start with 2-3 cameras covering your highest-risk zones, then expand as your budget allows. The eufy 3W Solar Panel eliminates battery maintenance entirely for outdoor eufy cameras - a practical set-and-forget solution for NZ's outdoor environments.

Hybrid systems blend wired indoor cameras with wireless outdoor units. Swann's range covers both ends - their indoor WiFi cameras handle interior zones while their outdoor spotlight cameras handle the perimeter. This approach lets you start small and wire in permanent cameras over time without replacing the entire system.

How Field of View Affects Camera Count

A wider field of view (FOV) means fewer cameras needed to cover a given area. Most consumer cameras cover 90-130 degrees horizontally. Pan-and-tilt cameras - like the Arlo Essential Pan Tilt 2K or the Swann Pan & Tilt Camera - can follow motion across a wide area from a single mounting point, effectively replacing 2-3 fixed cameras in large open zones like a backyard or carpark.

For narrow entry points like doorways and gates, a standard fixed lens is fine. For wide open areas - a driveway, yard, or warehouse floor - prioritise a wide-angle or pan-and-tilt unit to maximise coverage from a single camera position.

Top Security Camera Brands at Tech Supply Shed NZ

eufy - eufy's wireless camera range is one of the most popular choices for NZ homes, and for good reason. Local storage via HomeBase means your footage isn't locked behind a subscription, and the EufyCam S4 and E42 kits are genuinely easy to install without professional help. eufy cameras use AI-powered person detection to reduce false alerts - a practical advantage in properties with pets, trees, or street traffic. The eufy Cam 2C Pro 4-Camera Kit is a complete, scalable starting point for a standard NZ home.

Arlo - Arlo sits at the premium end of the wireless security camera market. The Pro 5, Pro 6, and Ultra 3 lines offer 2K and 4K resolution, colour night vision, integrated spotlights, and a robust cloud platform. Arlo cameras are a strong choice when image quality and remote monitoring are the priority - the Arlo Ultra 3 4K delivers exceptional detail for large properties. The Arlo Go 2 is unique in this range - LTE connectivity means it works without WiFi, making it ideal for rural properties, construction sites, or locations where internet coverage is unreliable.

Swann - Swann specialises in complete DVR and NVR security systems, making them the natural choice when you want a multi-camera setup with centralised local recording. Their 4, 6, and 8-camera kits come preconfigured for straightforward installation, and the wired cameras deliver consistent 1080p and 4K footage without the battery or connectivity concerns of wireless systems. The Swann 2K Outdoor Spotlight Cam is a capable standalone wireless option for those who want a single high-impact camera without a full system.

TVT - TVT is the professional-grade choice for commercial installs and larger properties where wired PoE reliability is essential. TVT's IP67-rated dome cameras, PoE NVRs, and full accessory ecosystem (junction boxes, brackets, baluns) are designed for permanent installations that need to perform consistently across NZ's varying climate conditions. If you're running cable through a new build or a business premises and need cameras that will last, TVT is the right foundation to build on.

How to Plan Your Camera Positions Before You Buy

Getting camera placement right before you purchase saves you from buying the wrong number of cameras or discovering blind spots after installation. Start by walking the perimeter of your property at dusk - this gives you a realistic sense of which areas are poorly lit, where shadows fall, and which angles give the widest view of each zone. Note any obstructions: trees, fences, eaves, and parked vehicles all affect line of sight and should factor into your mounting decisions.

Once you have a rough map, consider camera overlap. A small amount of overlap between adjacent cameras is intentional - it eliminates blind spots at the edges of each camera's field of view and ensures that if one camera is obscured or tampered with, the adjacent unit still captures the event. For entry points like front doors and gates, position the camera so the face and upper body of anyone approaching are clearly captured at 2 to 2.5 metres height. For wide coverage zones like driveways and yards, mount higher and angle downward to maximise the visible area. If you're installing a PoE system, plan your cable routes at this stage - running cable after the fact through finished walls or ceilings is significantly more disruptive than routing during the planning phase.

Common Mistakes to Avoid

The most frequent mistake is under-buying - purchasing a 4-camera system for a property that genuinely needs 6, then discovering the gaps too late. Choose a DVR or NVR recorder with more channels than you currently need, then add cameras progressively. Swann's 8-channel systems and TVT NVRs are built with this headroom in mind.

The second mistake is mounting cameras too high. Positioning above 3 metres significantly reduces facial recognition capability. For entry point cameras where identification matters, aim for 2 to 2.5 metres. For perimeter overview cameras, higher mounting is fine - you're capturing movement and vehicle detail rather than faces.

The third mistake is ignoring night vision range. A camera rated for 10-metre night vision will miss events at 15 metres. Check the stated infrared or colour night vision range against your actual coverage zone, and factor in whether the area has any ambient lighting that colour night vision cameras can use.

NZ-Specific Considerations

New Zealand privacy law requires that security cameras on residential properties do not capture footage of neighbouring properties, public footpaths, or other areas where people have a reasonable expectation of privacy. The Office of the Privacy Commissioner NZ provides clear guidance on the rules around residential and business camera use - it's worth reviewing before finalising camera positions, particularly for cameras that face boundaries or shared spaces.

A Quick Rule of Thumb

If you're unsure where to start: count your external doors and gates, then add one camera per side of your home that faces a road, laneway, or boundary. That number is your minimum. Add 20-30% more if you have a garage, carport, or garden shed you want covered. For a typical 3-4 bedroom NZ home on a standard section, that calculation usually lands at 4-6 cameras - which maps neatly to the eufy E42 4-Pack, Arlo Essentials 4-Pack, or a Swann 4-camera DVR kit as a starting point.

Shop Security Cameras at Tech Supply Shed NZ

Tech Supply Shed NZ stocks security cameras from eufy, Arlo, Swann, and TVT - from single wireless cameras to complete multi-camera PoE and DVR systems. Whether you're covering a single apartment entry or securing a commercial site, browse our full range and order online with confidence.