Air conditioning installation in Hampshire

Hampshire is a county where the right air conditioning specification changes every twenty miles. On the Solent coast, salt-laden air corrodes an untreated condenser coil years before its time. In Winchester's historic core, the constraint is the conservation officer rather than the weather. In Basingstoke, the housing is new and well insulated enough that summer overheating, not winter heat loss, is the usual complaint. Anyone searching for air conditioning installation in Hampshire is really asking one of several different questions, and the answer depends on which part of the county the house stands in. This page is the county-level map, with links to the town guides for street-level detail.

Airva is still building its installer network, so we review each Hampshire enquiry individually. The cost guide has our indicative figures by number of rooms.

The two coastal cities

Southampton and Portsmouth each have a dedicated guide that goes deeper than this page can.

Southampton is a mix of buyers as much as buildings: landlords with shared houses around Portswood and Highfield, leaseholders in Ocean Village and the city-centre blocks who need the freeholder's consent before anything else, owners of large detached houses in Bassett and Chilworth, and Victorian terraces towards the Polygon where the design question is siting in a small yard.

Portsmouth is a denser city. Portsea Island holds some of the tightest terraced housing in southern England, and the project-defining question is where the outdoor unit goes in a four-metre rear yard, and how quiet it is there, because the noise assessment at the neighbour's nearest window decides whether the installation is permitted development at all.

Winchester: heat load meets heritage

Winchester's historic core is the hardest siting environment in Hampshire away from the sea. The city centre has conservation areas and many listed buildings, and Winchester City Council is the planning authority there [1]. In a conservation area an outdoor unit cannot go on a wall or roof fronting a highway, an Article 4 direction can remove permitted development rights street by street, and permitted development does not apply to listed buildings at all, so they need listed building consent for external plant [2].

None of that makes cooling a Georgian townhouse impossible. It makes the unit position the first decision rather than the last. Rear elevations, courtyard corners screened from public view, colour-matched trunking and internal routing through cupboards and redundant flues are the standard toolkit, covered in our period property guide. Tall single-glazed sashes and solid walls produce demanding summer loads, so ask for a room-by-room calculation; the sizing guide explains what it should include. Settle the siting question with the planning permission guide and, where in doubt, with the council before pipework is priced.

Basingstoke: the post-war and new-build end of the county

Basingstoke is Winchester's opposite. The town's great expansion came after the war, and its stock runs from 1960s to 1980s estate housing through to the large new-build developments still going up on its fringes. This is the straightforward end of Hampshire: cavity or timber-frame walls, gardens and driveways for a ground-standing condenser, and lofts that give pipework an easy route.

Modern airtight, well-insulated houses hold heat in summer as effectively as they hold it in winter, and south- or west-facing plots with large glazed doors can overheat by June. The new-build guide covers the specifics, including developer covenants that sometimes restrict external alterations in the first years of an estate, a private-law constraint that sits alongside the planning rules. A multi-split serving the upstairs bedrooms from one garden condenser is a common design, and houses at the plan or renovation stage are good candidates for ducted systems, which need ceiling voids that older stock rarely offers.

The M27 corridor: Eastleigh, Fareham and Havant

Between and behind the two cities runs a nearly continuous band of suburban Hampshire: Eastleigh, Hedge End, Fareham, the Gosport peninsula, Portchester, Havant and Waterlooville. This is interwar and post-war semis and detached houses plus large 1980s to 2000s estates, each town answering to its own district or borough council. The installations are rarely complicated. Our Fareham guide covers detached houses where the rooms to be cooled and the only sensible spot for the outdoor unit are on opposite sides of the house. On the corridor's southern edge, at Gosport, Hill Head and Hayling Island, the coastal specification below applies.

The New Forest fringe

West of Southampton the county changes character abruptly. Totton, Ashurst, Lyndhurst, Brockenhurst, Sway, New Milton and the villages between them sit on or inside the New Forest, and for any address within the National Park boundary the planning authority is the New Forest National Park Authority rather than the district council [1]. Outside the boundary, New Forest District Council decides. The National Park changes who decides, not the permitted development conditions themselves. What does change them is a conservation area, a listed building or an Article 4 direction, so check those for your address before assuming permitted development applies [2]. Thatched and listed cottages are not rare here, and the housing, cob, brick and timber cottages alongside ordinary twentieth-century infill, suits the same discreet-siting approach as Winchester.

The same in every Hampshire postcode

Refrigerant, F-Gas certification and the paperwork to ask for are national; our guide to choosing an installer covers them. On a house, an outdoor unit is often permitted development, subject to siting and size conditions and to the MCS 020(a) noise calculation at the neighbour's window [2][3]. Flats do not have these rights, so an apartment generally needs a planning application plus the freeholder's written consent; the flat guide sets out the sequence.

The one thing to get right locally is who decides. Hampshire County Council is not the planning authority for these applications. Householder planning sits with the district, borough and city councils (Southampton, Portsmouth, Winchester, Basingstoke and Deane, Eastleigh, Fareham, Gosport, Havant, East Hampshire, Hart, Rushmoor, Test Valley and New Forest) and with the National Park Authority inside the park [1]. Check the authority for your address, not for your county.

Near the Solent, a coated coil, stainless fixings and sheltered siting add a modest amount to a quote rather than multiplying it. The cost estimator gives a sanity-check figure for your own rooms in a couple of minutes.

Hampshire questions, answered

Is one guide enough for the whole county? For the rules, yes: F-Gas, permitted development and the noise standard are national. For the practicalities, no, which is why Southampton, Portsmouth and Fareham have their own guides.

Does sea air really shorten a condenser's life? Untreated, yes. Specified with an anti-corrosion coated coil, coated or stainless fixings, sheltered siting and an annual coil rinse, a unit near the Solent should give a normal service life. Make the coating explicit on the quote.

Do I need planning permission for an outdoor unit on a house? Often not: permitted development covers many domestic installations, subject to siting conditions and the 42 dB(A) MCS 020(a) test [2][3]. Conservation areas, listed buildings and Article 4 directions change the answer. Confirm with your district or city council, or with the National Park Authority inside the New Forest [1].

What about a flat? Plan for a planning application and freeholder consent before anything else, because permitted development rights for these units do not extend to flats [2]. Start both before collecting quotes.

Around Hampshire, and beyond it

Along the coast to the west, Bournemouth has its own guide, where clifftop blocks and retirement apartments dominate. Inland, the county guides for Surrey and Hertfordshire cover commuter-belt stock with a different set of questions.

Tell us the town and the property type: marina flat, downland cottage or Basingstoke new build. Submit a home enquiry. We'll review your requirements and match you with a suitable installer operating in your area.