MEP design in Croydon

Croydon houses, and what their services usually need

Croydon has a big stock of inter-war semis and Victorian terraces. The average terraced house sold for £396,579, the average semi for £535,706 and the average detached house for £837,514. Prices over twelve months moved by -3.4 per cent, so most owners here are improving a home they intend to keep, not preparing a quick sale.

In practice that means a gas boiler near the end of its life, a cylinder squeezed into a landing cupboard and a consumer unit that predates modern circuits. A good MEP design asks whether the extension is the time to move to a heat pump and underfloor heating, or to leave the existing system and simply extend it. We cost both in plain terms and let you choose.

Gardens matter as well. Domestic gardens cover 32.8 per cent of the borough's land in the national garden survey, and an outdoor heat pump unit, a soil pipe or an external flue has to sit somewhere in that space without annoying a neighbour. We show a unit's location and its distance to the boundary on the plan.

Planning context for services in Croydon

In its latest published year the council decided 786 householder applications and granted 86.6 per cent. It decided 94.4 per cent in time, which is about eight weeks or an agreed extension. These are planning figures. They tell us how busy the department is, not how building control will treat a plan, and we never read them as a promise.

Larger home extensions under prior approval had a sharper split: the national returns for the latest year show 17 granted and 34 refused. Where an extension depends on that route, plant and flues are part of the neighbour-impact picture, so the services drawing travels with the planning drawings.

The borough also carries 19 conservation areas, with its Conservation Areas General Guidance SPD guiding what can change, and 180 listed building entries. A visible flue terminal or external unit on a street frontage in a conservation area needs thought, and the design puts such items at the rear or on the roof slope that does not face the street.

Green Belt and the south of the borough

About 25 per cent of Croydon is covered by Green Belt polygons, mostly in the south. Homes there are often further from the gas main and have larger plots, which makes air-source or ground-source heat a practical choice. They are also more likely to rely on a septic tank or package treatment plant, so the water and drainage part of the design starts with what is already on the land.

In those areas we ask about the oil tank, the cesspool and the electrical supply at the first call. A rural supply may not carry a heat pump and a charge point together without an upgrade, and finding out costs a phone call to the network operator rather than a delay on site.

Energy limits and the numbers we design to

The limiting fabric values for an extension are 0.18 W/m²K for walls and 0.15 for roofs. A heat pump is designed to run at a flow temperature no higher than 55 degrees Celsius. For ventilation, a three-bedroom house needs 31 litres per second across the whole dwelling.

The borough charge adds to the project budget: Croydon sits in Mayoral CIL band 3 with an indexed rate of £30.3 per square metre this year. We mention it only so you can see where the services spend sits in the whole picture.

Scope, price and related pages

A Croydon MEP package covers a heating strategy and heat-loss summary, a ventilation layout, power and lighting plans, a water and drainage schematic and plant locations. There is no published price, because a bay-window refit and a rebuild are different jobs; we run a free constraints check and fix the fee afterwards.

Read the wider picture at architectural drawings in Croydon or the general MEP design page. The same site can use our building regulations drawings in Croydon, and the energy rating from SAP calculations in Croydon. Next door, see MEP design in Bromley and MEP design in Southwark.