Fitting air conditioning in Halifax usually comes down to one question: where can the outdoor unit go on a stone house built into a hillside? On most homes it can go in under permitted development, and the survey is where the awkward access, the wall type and any conservation area rules get worked out.
Halifax is built on steep valley sides out of local stone. Terraces climb the hills around King Cross, Pellon, Boothtown and Siddal. Larger Victorian houses line the streets around Savile Park, Skircoat Green and Heath. Newer estates sit on the edges at Illingworth, Northowram and Shelf. Sowerby Bridge, Elland and Brighouse each have their own stone town centres and hillside terraces.
Stone walls take longer to drill, and steep plots can make access awkward. Many outdoor units go on wall brackets because there is no flat ground nearby, and a bracket on the high side of a terrace may need a tower to fit safely. Through terraces built into the slope sometimes have a basement level at the back, which can give a sheltered spot for the condenser close to a short pipe run.
Calderdale Council handles planning. Since 29 May 2025 air-to-air heat pumps on houses in England can be permitted development under Class G, Part 14, Schedule 2 of the General Permitted Development Order 2015. The outdoor unit must be 1.5 cubic metres or smaller and pass the 37 dB(A) noise limit at the neighbour's nearest habitable room window. Houses that are not detached can have one unit under these rights. Listed buildings are excluded.
Calderdale Council has designated 19 conservation areas across the district, according to its own open data. Much of central Halifax is covered, and so are parts of Sowerby Bridge, Elland and Brighouse. In a conservation area the outdoor unit cannot go on a wall or roof facing a highway. The Piece Hall and many of the town centre's merchant buildings are listed, which brings listed building consent into any external work.
Worked example: using a garden wall to pass the noise test. MCS 020 a) works out the level at the neighbour's window as sound power + 10 x log10(Q / (4 x pi x distance squared)) + barrier correction. Say the condenser has a sound power of 60 dB(A), it sits on the ground against the house so Q is 4, and the neighbour's window is 5 metres away. Then 4 x pi x 25 = 314.2, and 4 / 314.2 = 0.0127. Ten times log10 of 0.0127 is about minus 19.0, so the level is 41.0 dB(A). That fails by 4 dB(A). On a terrace plot there may be nowhere further away to put it. But if a solid stone boundary wall fully blocks the line of sight between the unit and the window, the standard allows up to 10 dB(A) off, which brings it to 31.0 dB(A) and a pass. Partial screening counts for up to 5 dB(A). The 60 dB(A) figure is for illustration, so ask for the sum with the real model.
Our partner installers are MCS certified and apply the 0% VAT rate to domestic air-to-air heat pump installations, which most modern split systems are. HMRC's VAT Notice 708/6 sets that zero rate for homes until 31 March 2027. MCS certification is also what an installer needs to claim the Boiler Upgrade Scheme grant.
Commercially, Halifax has the Piece Hall, the Dean Clough mills, the town centre shops and offices, and businesses along the Calder Valley. Converted mill buildings often have thick walls and high ceilings, which affect the type of system chosen.
Fill in the form on this page with your postcode and the rooms you want covered. We pass it to installers who already work across the HX postcodes.