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CSIC ArchiveIndependent notes on construction innovation in Scotland, 2014–2022

Scotland's New Build Heat Standard: what it means for new homes and buildings

Published 2026-11-02

For most of the innovation centre's life, "zero-emissions heating" in a new Scottish home was something a demonstrator project chose to test. The Edinburgh Home Demonstrator at Granton, for example, was planned around it. Since 2024 it has been a building regulation. The New Build Heat Standard (NBHS) requires new homes and other new buildings to use climate-friendly heating instead of gas or oil boilers. This article explains what the standard covers, how it was relaxed in January 2025, and what it changes in practice. It is based on the Scottish Government's factsheet, last updated on 1 January 2025 and checked in November 2026.

The rule in one sentence

A new building whose building warrant was applied for on or after 1 April 2024 cannot use a direct emissions heating system, meaning one that burns fossil fuel in the building, such as a gas or oil boiler, as its main source of space heating and hot water. The Scottish Government presents the NBHS as part of its wider Heat in Buildings Strategy and gives its reason plainly: heating Scotland's homes and buildings is one of the biggest contributors to the country's carbon emissions, and the standard is meant to ensure that new buildings do not add to them.

The standard covers systems used for heating, cooling and hot water. In practice, the compliant options are the ones that produce no emissions where the heat is used: heat pumps, electric heating, or a connection to a heat network. Heat networks are treated as clean heating whatever fuel powers them, which matters in dense urban schemes where a shared energy centre may still burn gas.

Where it applies, and where it does not

According to the government's guidance, the NBHS applies to:

It does not apply to:

The date that counts is the date of the warrant application, not the completion date. A building warrant is the legal permission to start work, and it lasts three years; it can be extended for an initial nine months, and further extensions are at the discretion of the building standards officer. That is why homes with gas boilers can still be completed in Scotland after April 2024: they belong to developments whose warrants were applied for before the deadline, and they may keep installing those systems for as long as the warrant remains valid. Anyone buying a newly completed home should not assume it meets the NBHS just because it is new.

What changed on 1 January 2025

When the standard came in, people in rural and island communities raised concerns about wood-burning stoves and bioenergy. A temporary ministerial direction allowing wood-burning stoves in new homes was in place by September 2024, and the government then brought an amendment to Parliament on 8 November 2024. It came into force on 1 January 2025 and made two changes:

  1. Bioenergy and peat are allowed. Wood burners and other bioenergy systems, along with peat-burning systems, can be installed in all new homes and buildings. Bioenergy here covers both biofuels and biomass, including systems using wood, vegetable oils and biogas. A system that can also run on fossil fuel is allowed if its intended use is with bioenergy.
  2. Only the main system is regulated. The standard now applies only to the main heating system, defined as one that can meet the building's demand for space heating and hot water in normal operation. Any secondary system, such as a stove in the living room, is allowed.

What did not change: fossil gas and oil boilers still cannot be the main heating in a new building. The emergency provision lets a direct emissions system, oil or gas for example, be installed only if it is for emergency use and that use can be justified.

Conversions

Building regulations treat a conversion (a change of occupation or use, such as an office becoming a hotel, or an attic becoming a bedroom) differently from an alteration or an extension. The NBHS applies to a conversion if two conditions are met: the building, or the part being converted, already has a direct emissions heating system, and it is "reasonably practicable" to install a clean heating system instead. Since January 2025 it does not apply if the building being converted already has a bioenergy or peat main heating system. For other systems, the answer depends on the Building Standards Technical Handbooks, and local authority building standards teams decide on each warrant application.

What it means for the people building

Designers now have to plan heating from the first sketches, not at the end. A heat pump works best in a building that loses little heat and has emitters sized for low flow temperatures, which pushes the fabric towards better airtightness and insulation. That is the territory of Passivhaus, which the innovation centre taught through Passivhaus in Practice. Space also has to be found early: an outdoor unit, a hot water cylinder, and possibly a plant room or a heat network connection.

Builders and manufacturers gain from repetition. Factory-built homes can integrate heating, ventilation and controls into standard panels or modules, tested before they reach site. This is one reason why modern methods of construction and zero-emissions heating were paired in the Granton plans.

Installers and trades need different skills. Commissioning a heat pump, balancing a low-temperature system and explaining its controls to an occupant are not the same job as fitting a gas boiler, and firms that move early can train their teams before the work arrives.

Buyers and tenants should ask three questions about a new home: when the building warrant was applied for, what the main heating system is, and whether there is a secondary system. The answers say more about future running costs and comfort than the age of the building alone.

How it fits the 2045 target

Scotland's climate law sets 2045 as its net zero year (see our explainer). Any new building fitted with a gas boiler would eventually need its heating replaced to meet that target; the NBHS stops adding to that backlog. The much larger task, decarbonising existing homes, sits under the Heat in Buildings Strategy and separate proposals for existing buildings, which this standard does not cover.

Checklist

Sources