UK Tenement Heat Pump Guide 2026

What makes Scottish tenements different

Scottish tenements are 4–6 storey sandstone or stone buildings, mostly built between 1860 and 1939, that share a common stair (the "close"), a shared roof, and shared external walls. Around 300,000 dwellings in Scotland are in tenement form. Glasgow has the highest concentration; Edinburgh, Aberdeen and Dundee have substantial tenement stock in central districts.

For heat-pump retrofits, this matters because:

• The external walls where you'd mount an outdoor unit are jointly owned
• The back court / garden is jointly owned
• Most central tenement streets are in conservation areas
• Many tenements are also listed (Category A, B, or C)
• Original heating systems used very high flow temperatures, so internal radiators need upgrading
• Pipe routing through shared walls or shared common-stair voids may need consent

The Tenements (Scotland) Act 2004

The Act sets the default rules for shared-property decisions in tenements unless an existing title deed provides different rules. For installations on shared parts of the building (external walls, roof, close, back court), consent is required from a majority of proprietors.

In practice this means:

1. You'll need a brief written notice describing the proposed installation (your installer can draft this).
2. Distribute to all co-proprietors (your factor or property manager usually has the contact list).
3. Allow 4 weeks for objection — silence is generally interpreted as consent under most title deeds.
4. If a majority objects, alternative siting must be considered (rear-only mounting, roof installation, or interior plant rooms in some buildings).

Some title deeds require unanimous consent for external alterations. Check yours before assuming the Act's default rules apply.

Conservation-area planning consent

Most central Edinburgh, much of central Glasgow (Park, Pollokshields, Hyndland, Dennistoun), Aberdeen West End and Rosemount, and parts of Dundee city centre are in conservation areas. Heat pump installations in conservation areas typically require:

• A separate planning application (typically £200–£500 in council fees)
• Architectural plans showing the outdoor unit position and visibility from the street
• An acoustic statement (the unit must operate below 42 dB at the neighbouring property — MCS 020 standard)
• Approval timeline: 8–12 weeks typical; 12–16 weeks if listed-building consent is also required

Tenement-suitable heat pump units

Slim form-factor units that fit on rear closes or against external walls without significantly protruding:

• Daikin Altherma EBLA — 4–9 kW, ~750 mm depth, common in Edinburgh
• Mitsubishi Ecodan PUZ-WM — 5–7 kW, slim, includes weather compensation as standard
• Vaillant aroTHERM Plus — 5–7 kW, R290 refrigerant (lowest GWP)
• Samsung EHS Mono — increasingly common, very slim front-to-back

For 1-bedroom flats or studios, a 5 kW unit is typical. 2-bedroom tenement flats usually take 6–7 kW. Larger flats (3-bed converted from larger originals) may take 8–10 kW with appropriate radiator sizing.

Tenement install: typical 4-day timeline on site

1. Day 1: Outdoor unit mounting + pipe penetration through external wall (typically rear)
2. Day 2: Internal pipework upgrade + new hot-water cylinder install (replacing old immersion or combi)
3. Day 3: Radiator upgrades in 2–4 rooms (typically living room, kitchen, master bedroom)
4. Day 4: Commissioning + smart-control setup + tariff guidance

Common tenement install pitfalls

• Not getting consent in writing — verbal "OK" won't satisfy your installer's MCS audit
• Forgetting close-stair access for the engineer — your factor may need to provide entry codes
• Not declaring listed-building status — Category B or C listings can require materials specifications you didn't budget for
• Underestimating radiator upgrades — Scottish tenements often have heated towel rails on bathroom circuits that don't work at heat-pump flow temperatures
• Acoustic test failure — back-court mounting can echo; some installations need a sound enclosure adding £200–£400

Tenement heat pump FAQs