WindowCost
Portsmouth

Window costs in Portsmouth

Indicative pricing for a standard 1200×1000mm casement window fully fitted in Portsmouth, across four common specifications.

MaterialGlazingSizePrice range
uPVC Double Standard (1200x1000mm casement) £600 - £1,500
uPVC Triple Standard (1200x1000mm casement) £900 - £2,100
Aluminium Double Standard (1200x1000mm casement) £1,080 - £2,640
Timber Double Standard (1200x1000mm casement) £1,440 - £4,200

Portsmouth specifics

Housing: Old Portsmouth and Southsea conservation areas protect Victorian terraces; post-war council stock is prevalent in Paulsgrove and Leigh Park.

Climate: Direct sea exposure across the harbour; salt-laden winds accelerate hardware corrosion on south-facing windows.

Price driver: Conservation-area jobs in Southsea carry a premium; outer estates offer straightforward, lower-cost replacements.

Installers: Mixed heritage and modern installer base; historic dockyard specialists available for listed-building work.

Property age in Portsmouth

Based on 90,008 Energy Performance Certificates issued across Portsmouth. Age band shapes which window fittings are specified — pre-1919 homes typically need timber sash or heritage-pattern casement; post-1980 stock accepts off-the-shelf uPVC.

Pre-1919: 37.4% (33,683 certs) 37.4%Pre-1919 1919-1944: 12.7% (11,447 certs) 12.7%1919-1944 1945-1964: 15.6% (14,037 certs) 15.6%1945-1964 1965-1980: 11.7% (10,491 certs) 11.7%1965-1980 1981-2002: 10% (9,017 certs) 10% 2003+: 5.7% (5,163 certs)
1981-2002 10% 2003+ 5.7%

Source: DCLG EPC bulk domestic dataset (OGL v3). Certificates issued to 2026-04-24.

25 conservation areas recorded in Portsmouth on Historic England's national register. If your property sits inside one, expect Article 4 directions and consent requirements that affect window choice and material — see Article 4 directions and windows in conservation areas.

By window type in Portsmouth

Casement

See casement prices and specification in Portsmouth.

Sash

See sash prices and specification in Portsmouth.

Tilt & Turn

See tilt & turn prices and specification in Portsmouth.

Bay

See bay prices and specification in Portsmouth.

French

See french prices and specification in Portsmouth.

Roof

See roof prices and specification in Portsmouth.

Secondary glazing

See secondary glazing prices and specification in Portsmouth.

Next steps

Look at installers covering Portsmouth, or read the full cost-guide library for material and glazing deep-dives.