Door Entry and Access Control What Sheffield businesses and apartment blocks actually need

Door Entry and Access Control Are Two Different Jobs

People use the terms interchangeably, and installers rarely correct them, but they solve different problems and you may only need one.

Door entry is about visitors. Someone who does not belong to the building arrives, presses a button, and a person inside decides whether to let them in. That is the intercom: a panel outside, handsets or an app inside, and a release on the lock.

Access control is about the people who do belong to the building. They present something, a fob, a card, a phone or a PIN, and the door opens without anyone being asked. The system knows who it was and writes it down.

A converted mill with twelve flats usually needs both. A twenty-desk office with a receptionist often needs access control on the internal doors and nothing more sophisticated than a doorbell at the front. Working out which you need is most of the value of a survey, and it is the fastest way to stop yourself buying a system twice the size of the problem.

The Four Ways to Open a Door

Every system on the market is some combination of these. None of them is best in all cases.

• Mechanical key. Cheap, universally understood, works in a power cut, and completely uncontrolled. There is no record of use, and the only way to remove someone's access is to change the barrel and reissue keys to everyone else. It stays in the plan as the emergency override, not as the daily method.
• Fob or card. The workhorse. Cheap to issue, easy to revoke instantly, and everyone already knows how to use one. The weakness is that a fob does not know who is holding it, so a lent fob is an unlogged entry.
• Phone. Bluetooth or NFC from an app. Nothing to issue, nothing to lose, and revoking access takes seconds from wherever you are. The catch is that it depends on the phone being charged and the person having installed the app, which is fine for staff and less fine for a contractor arriving at eight in the morning.
• PIN keypad. Useful for cleaners, occasional contractors and stock rooms. Also the credential most likely to end up written on the inside of a cupboard door. Give each person their own code rather than one shared code for the building, or you are back to not knowing who came in.

In practice most buildings run two together: fobs for everyone, phones for the people who want them, a keypad on the doors that need occasional access, and a mechanical override that lives in a safe rather than on a hook.

The Lock Is the Hard Part, Not the Reader

This is the single biggest thing people get wrong when comparing quotes. The reader is the visible bit, so it is what the conversation is about, but it is close to the cheapest component. What determines whether the job works, what it costs, and how long it takes is the lock and the door it is fitted to.

Three broad options, and the door usually decides which:

• Magnetic lock, or maglock. An electromagnet on the frame and a steel plate on the door. Strong, forgiving of a door that has dropped slightly, and mounted on the surface rather than cut into the timber, which matters on a door you are not allowed to modify. It holds only while it is powered, so it releases in a power cut. That is a safety feature on an escape route and a security problem on a stock room.
• Electric strike. Replaces the keep in the frame, so the lock itself stays mechanical and the door still locks conventionally. Neater and cheaper on a door that closes properly. Fussier on an old, warped or badly hung door, which describes a lot of doors in Sheffield's converted stock.
• Motorised or electric multi-point lock. Usually the answer on a communal entrance door with a multi-point mechanism already fitted. Considerably more expensive, considerably more secure, and often the only thing that will work on a modern composite or aluminium entrance.

You will also see fail-safe and fail-secure on quotes. Fail-safe means the door unlocks when power is lost. Fail-secure means it stays locked. That is not a preference, it is a decision made per door based on what the door is for, and it is one of the things a proper survey settles in writing rather than on the day.

Fire Doors, and the Part Nobody Puts on the Quote

This is where cheap access control quietly becomes a liability, so it is worth being blunt about it.

Anything on an escape route has to let people out without a fob, a code, a phone or any thought at all. That normally means a request to exit button or a push bar on the inside, plus a green emergency break-glass release next to the door that cuts power to the lock directly, not through the software. If the only way out of your building is for the access control system to be working and in a good mood, the system is wrong.

Locks on escape routes also generally need to release when the fire alarm activates. The interface between the fire alarm panel and the door hardware is covered by BS 7273-4, and it is not something to improvise. In practice that means the access control installer and the fire alarm engineer agree the interface before anything is fitted, it gets tested on handover with the alarm actually triggered, and the test is documented. Your fire risk assessment is what determines the requirement for your specific building, so it is the document to work from rather than a general rule off the internet.

If a quote for electrically locking a fire door does not mention any of this, that is not a cheaper quote. It is an incomplete one.

Apartment Blocks: What Actually Goes Wrong

Blocks fail in a consistent set of ways, and we see the same list whether it is a mill conversion at Kelham Island, a purpose-built block in the city centre, or a 1970s low-rise out towards Hillsborough.

• Nobody knows how many fobs exist. Twenty years of tenants, cleaners, letting agents and contractors, and no register. On an old system the only fix is to reprogram every fob in the building at once, which is a project in itself. On a modern one it is an afternoon of admin.
• The handsets are obsolete. The panel outside has failed, the manufacturer no longer exists, and a matching handset costs more than a new one. This is the most common reason a block calls us at all.
• The bin store and the bike store are wide open, or worse, on the same key as the front door, so a lost key is a whole-building problem rather than a small one.
• Deliveries. Couriers buzz every flat until someone gives up and lets them in, which defeats the entire system. A video panel and a per-visit release, or a proper parcel arrangement, solves a security problem that is really a behaviour problem.
• Nobody can prove anything. When there is a break-in or a dispute about who propped the door, there is no log and no footage of the entrance, so the conversation goes nowhere.

A practical note for managing agents and RTM companies: on leasehold blocks, works costing more than £250 for any single leaseholder trigger the Section 20 consultation process under the Landlord and Tenant Act 1985. A door entry replacement usually clears that threshold comfortably. It is worth getting the specification and a written quote early precisely because the consultation takes longer than the installation does, and we are used to producing documents that are meant to be read by residents rather than by engineers.

The other question worth asking early is whether the existing cabling can be reused. Sometimes it can, particularly if there is a usable riser and the original installer was tidy. Often the honest answer is that a two-core run from 1998 will technically work and will also be the thing you are ringing us about in two years. We will tell you which of those you have before you commit.

Offices and Units: Which Doors Actually Matter

For a commercial site, the instinct is to secure the front door and stop. The front door is rarely where the risk is.

• The front door, obviously, and usually with an intercom because visitors and deliveries arrive there.
• The comms cupboard or server room. Almost never controlled, and it holds the switch, the recorder and everything on the network. If someone can reach the rack, the cameras and the door system are both academic.
• Stock, tools or anything resaleable. The doors where knowing exactly who went in and when is worth more than keeping people out.
• The back door and the fire exit. The doors that get propped open with a fire extinguisher on a hot day. A door contact that tells you when it has been held open for five minutes is often the single most useful thing in the whole install.
• Shared entrances in a multi-tenant building. Where your access ends and the landlord's begins needs to be agreed on paper before anyone drills anything.

Why We Put It on the Same System as the Cameras

We fit Unifi Access, on the same platform as the network and the cameras we already install, and the reason is boring and practical rather than brand loyalty.

An unlock event on its own tells you a fob was presented. An unlock event with the camera clip attached tells you who presented it. When those are two separate systems from two different suppliers, nobody ever correlates them, because doing so means exporting footage by timestamp from one system and matching it to a log in another. When they are one system, the clip is simply attached to the entry, and someone actually looks.

The rest follows from that. One app for the network, the cameras and the doors. One console to log into. No per-door monthly charge, no per-user licence, and no cloud subscription holding your own door log hostage. You own the hardware and the data sits on site.

The honest limits, because they matter when you are choosing: this is not the right platform for a site that needs full alarm-receiving-centre integration, high-security certification for insurance purposes, or a national estate with thousands of doors and a dedicated security team. There are specialist systems for that and we will say so. For a Sheffield office, a trade unit, a practice, a school block or a residential building of a sensible size, it does the job well and it does not tax you monthly for the privilege.

It does need a real network underneath it. Door controllers are wired devices on a PoE switch, the same as the cameras and the access points, which is why access control on a site with no structured cabling turns into a cabling job with a door system attached. That is not upselling, it is just the order the work has to happen in. Our guide to wiring for Cat6 covers what that side of it involves.

Leavers, Fobs and the Admin That Saves the Money

The business case for access control is almost never the break-in. It is the ordinary week.

Someone leaves on a Friday and their access is gone by Friday evening, from a phone, without a locksmith and without reissuing keys to thirty other people. A contractor gets access to one door for one Tuesday and it expires by itself. The cleaner's code works between six and nine and not at midnight. When something does go missing, there is a list of who opened which door and when, and the list is credible because it was written automatically rather than remembered afterwards.

One rekeying job avoided usually covers a meaningful chunk of the difference between a mechanical solution and a controlled one. Two of them covers it outright.

What It Costs

We will not put a per-door number on a page, for the same reason we will not quote a network over the phone. The reader is a small fraction of the cost and the variables that actually set the price are all things you have to look at: what the door is made of, whether it closes properly, whether there is a route for a cable to it, whether it is on an escape route, whether the frame will take a strike, and how many doors can share a controller.

What we can give you is where it sits in a whole-site build. Our Business Starter package starts at £2,299 and is the network foundation that door entry and CCTV layer onto later without ripping anything out. Business Pro starts at £6,499 and includes door access control alongside the cameras and the cabling as one piece of work. Full-site commercial builds with CCTV and access control across a whole premises typically land between £6,499 and £18,000, and our guide to what a Unifi installation costs breaks that down properly.

Adding controlled doors to a building that already has decent cabling is a much smaller job than any of those figures suggest. That is the survey's job to establish, and the survey is free.

Common Questions

What happens if the internet goes down?

The doors carry on working. Credentials and permissions live on the controller in the building, not in a data centre, so fobs, codes and existing app credentials keep opening the doors they are allowed to open. What you lose while the connection is down is remote unlocking, remote management and notifications. Local operation is unaffected.

What happens in a power cut?

That depends on the choice made per door between fail-safe and fail-secure, which is why it is decided at design rather than left to the hardware. Escape routes are arranged so people can always get out. Controllers and locks can be put on battery backup so the building keeps operating through a short outage, and on a communal entrance we would normally recommend it. There is also a mechanical override on the main door as a matter of course.

Can I keep my existing handsets and cabling?

Sometimes, and it is one of the first things we check because it changes the cost significantly. Some legacy panels can be replaced while the existing riser and handsets stay, particularly on more recent audio systems. Often the wiring is the reason the old system became unreliable in the first place, in which case reusing it just moves the problem forward a couple of years. We will tell you honestly which situation you are in, in writing, before you decide.

Is a video panel worth it over audio only?

For a residential block, generally yes, and residents notice the difference immediately. Being able to see who is at the door before releasing it is the whole point of the system, and audio-only leaves people guessing. For a small office with a staffed reception it is often unnecessary. For an unstaffed trade counter or a unit where deliveries arrive all day, it usually pays for itself in not having to walk to the door.

Do I need a subscription?

Not with the platform we install. There is no per-door fee, no per-user licence and no cloud storage charge. The system runs on hardware you own and the logs stay on site. We offer an optional monitoring plan if you would rather we kept an eye on the estate for you, but nothing is locked behind it and the system is fully functional without it.

Can I have door entry without upgrading the whole network?

Usually yes, if there is a sensible route for cable and somewhere to put a small switch. A single entrance with a controller and a couple of doors does not require a site-wide rebuild. What we will not do is bolt a door system onto a network that is already unreliable and let you find out the hard way, so if the existing kit is the actual problem we will say so before quoting rather than after.

What about GDPR, given the system logs people?

An access log records identifiable individuals, so it is personal data and the usual obligations apply: tell people the system is there, keep the data no longer than you need it, and be able to answer a request about it. In practice this is straightforward. Retention is configurable, signage at the entrance covers the notification, and for residential blocks the managing agent is normally the data controller. Our article on smart home security covers the same ground for cameras, which sit under the ICO's CCTV guidance.

Getting It Scoped

We come out, look at every door in question, and tell you which of them genuinely needs controlling and which does not. You get a written plan with the doors listed, the lock type for each one, the cable routes, the fire interface where one is needed, and a fixed price. It is free, there is no obligation, and the plan is yours to keep even if you take it to another installer.

We cover all of Yorkshire from our Sheffield base: Rotherham, Barnsley, Doncaster, Chesterfield, Leeds, Bradford, Wakefield, Huddersfield, Halifax, Keighley, York, Harrogate, Hull and everywhere in between. See our door entry and access control service, give us a ring on 07438 972049 or book a call below.