Before anyone lifts an oven into its housing, one detail decides how the job will go: the rating plate. The power rating printed on the back of the oven, or in its manual, tells you whether it can run from an ordinary plug or needs to be wired into a cooker circuit. Getting that right is the core of safe oven installation, and it is the first thing checked when you send the model number.
Voltify Contractors fits electric single and double ovens, built-in and built-under, in homes and rented properties across East and South-East London, including Canary Wharf (E14), Stratford (E15), Bow (E3), Canning Town (E16), Greenwich (SE10), Woolwich (SE18) and Barking (IG11). It is part of our appliance installation service. This page explains what changes from one oven to another, what is checked on the existing supply, and where gas ovens are handled differently.
Plug-In or Hard-Wired? Reading the Rating Plate
Many single built-in ovens are rated low enough to come with a standard 13A plug. Most double ovens, and some larger single ovens, draw more power than a plug can safely supply, and they are supplied without one. These need to be connected to a cooker circuit, usually through a cooker control unit or connection plate on the wall.
| Situation | What it usually means for the installation |
|---|---|
| Oven supplied with a 13A plug | Plugs into a socket that is reachable, ideally in an adjacent cupboard, and never through an extension lead or adaptor |
| Oven supplied without a plug | Wired to an existing cooker circuit, if that circuit is suitable for the new oven’s rating |
| New oven rated higher than the old one | The existing cable and circuit are checked; a new or upgraded circuit may be needed first |
| Oven being fitted where there was none before | A new supply of the right type has to be provided before the oven goes in |
Do not assume that because the old oven was hard-wired, any new oven can go on the same connection. A double oven replacing a single one, or a new induction hob added to a circuit that only ever fed an oven, can push the demand beyond what the existing cable was designed for — our hob installation page explains how that is checked when both are changing. Where new or upgraded wiring is needed, it is carried out as part of our electrical services.
Moving Up to a Double Oven: When the Circuit Needs Work
Swapping a plug-in single oven for a hard-wired double, or adding an oven where the kitchen never had one, is where the electrical side of the job grows. Before anything is connected, the existing cooker cable, the protective device at the consumer unit and whatever else shares the circuit are compared with the new oven’s rating.
- Cable too small for the new load: it is replaced or upgraded before the oven goes in.
- No cooker circuit at all: a new circuit is run from the consumer unit to a cooker switch or connection point.
- Worn or badly placed cooker switch: it is renewed, or moved to where it can be reached without leaning over the hob.
When a new circuit is installed or an existing one is upgraded, the work is tested and you receive an Electrical Installation Certificate for it. Keep it with your property records; landlords and future buyers may ask to see it.
Oven Installation by Type: Built-In, Built-Under and Freestanding
Built-in ovens sit in a tall housing, often at eye level, with a cupboard above and below. Built-under ovens sit beneath the worktop inside a base unit, usually with a hob above. The oven’s outside dimensions are not the same as the opening it needs, so the housing aperture in the manufacturer’s diagram is the figure to check. It is worth doing before you order, especially for a double oven, where built-in and built-under versions are different heights.
A freestanding cooker, with its own hob on top, is a different job again, with its own considerations for stability and connection — see our cooker installation page.
Fitted ovens are fixed into the housing with screws through the front frame, so the oven cannot tip forward when the door is opened and a heavy tray is resting on it. Built-in ovens also rely on the ventilation gaps set out in the manufacturer’s instructions — usually at the back of the housing and sometimes in the plinth or the shelf below. If those gaps are blocked, heat can build up around the oven and the surrounding units.
When the Old Oven Comes Out
A replacement often uncovers things that were hidden behind the old appliance:
- A scorched, loose or discoloured cooker connection plate or plug, which should be replaced rather than reused.
- A cable that is too short to reach once the new oven is in position, or has been crushed behind the old one.
- A housing that is a different size, particularly when changing brand. Small differences can often be accommodated; a larger change can mean altering the housing or the shelf it sits on.
- Old support rails or brackets that no longer suit the new oven.
If kitchen units need adjusting to take the new oven, small carpentry work can be combined through our handyman and property maintenance service.
Gas Ovens
A gas oven has to be connected to the gas supply by a Gas Safe registered engineer. If your new oven is gas, or you are switching from gas to electric and the old gas supply needs capping, mention it when you get in touch so it is clear from the start which parts of the job are carried out separately.
Built-In Ovens in Integrated Kitchens
If the oven sits in a run of integrated units, with a fridge or dishwasher hidden behind matching doors nearby, the checks for housing size and ventilation overlap with those on our integrated appliance installation page. Planning several appliances at the same time is often simpler than fitting them one by one, especially when the electrical supply for more than one of them needs looking at.
Fitting Day: From Old Oven Out to First Heat-Up
A built-in oven swap follows roughly the same order each time. Knowing it helps you decide what to clear beforehand and what to have ready.
- The cooker circuit is switched off at the consumer unit and confirmed dead before any screws come out.
- The old oven is unfixed from the housing frame, eased forward and disconnected. If you asked for it when booking, it is taken away for disposal.
- The connection plate, cable and empty housing are inspected, including the ventilation gaps the new model needs.
- The new oven is connected to suit its rating, by plug or hard-wired, then slid into place and screwed into the frame.
- Power goes back on, and the heating, fan, light and door alignment are checked.
- You are shown the controls and reminded about the empty burn-off run most manuals ask for before first use.
Emptying the cupboards above and below the housing, and keeping the oven’s manual and packaging to hand, makes the visit smoother. Installations are booked between 7am and 5pm, Monday to Friday. Call 020 3411 1855 to arrange one.
What Affects the Cost
The documented minimum call-out is £80 for the first hour. A plug-in single oven swapped into the same housing is at the simpler end. The cost rises when the oven needs hard-wiring, the cooker connection has to be replaced, the existing circuit is not suitable for the new rating, or the housing has to be altered. Parts and cable are not included in the call-out minimum. If the old oven needs taking away, ask when you book so it can be confirmed.
To get a clear answer quickly, send the model number or rating plate details of the new oven, a photo of the housing, and a photo of the existing plug, socket or cooker switch. If you are weighing up fitting it yourself, our guide can you install an oven yourself? explains which oven jobs are realistic DIY and which are not. Get in touch with Voltify Contractors to discuss the installation, or check the areas we cover.
