Is There a Gas Boiler Ban for New Builds, and When Does It Start?

Summary

"Gas boiler ban" is a shorthand that gets used loosely for at least two genuinely different UK government policies, and conflating them causes real confusion for tradespeople quoting or advising customers. The first, and the one this article focuses on, is the Future Homes Standard — a Building Regulations mechanism that applies specifically to new-build homes in England, delivered through amendments to Part L and Part F. The second is a broader, longer-running policy ambition — first set out in the 2021 Heat and Buildings Strategy — to phase out the installation of new gas boilers as replacements in existing homes by 2035, which is not a Building Regulations mechanism at all, has never been enacted as a straightforward prohibition, and has been publicly softened and delayed more than once.

For new-build work specifically, the mechanism that actually has legal force is the Building Regulations. The Future Homes Standard tightens Part L so that new homes must be built to a very low-carbon-heating specification — in practice, this means new homes are expected to be heated by low-carbon systems, principally air source heat pumps, rather than gas boilers, because a gas-boiler-heated new home could not realistically meet the standard's carbon and "zero-carbon ready" requirements. This is a regulatory outcome achieved through performance standards, not a line in a statute reading "gas boilers are banned in new homes."

The "2035" figure that gives this article its slug is not about new-build homes at all in its original form — it is about existing homes and boiler replacements, a policy area that has moved substantially since it was first announced and should be treated with real caution. Anyone advising a customer needs to keep these two policies separate: what applies to a new-build today runs through the Future Homes Standard and Part L; what might apply to an existing home's boiler replacement in the future is a much less settled picture.

Key Facts

• The mechanism for new builds is Building Regulations, not a standalone "ban" law — specifically the Future Homes Standard, delivered through Approved Document L (energy) and Approved Document F (ventilation).
• Future Homes Standard scope — applies to new-build homes in England; government has stated it takes effect from 2025, following a phased tightening that included a 2021 interim uplift to Part L. ****.
• What the standard actually requires — new homes must be "zero-carbon ready," meaning built to a fabric and heating specification that does not rely on fossil-fuel heating and needs no further retrofit as the electricity grid decarbonises. It does not contain a literal sentence prohibiting gas boiler installation; the outcome (no gas boilers) follows from the performance requirements being effectively unachievable with a gas boiler as primary heating.
• The practical effect — air source heat pumps become the default primary heating source for new-build homes meeting the standard, alongside improved insulation, airtightness, and Part F ventilation (often mechanical ventilation with heat recovery, MVHR).
• The separate "2035" target — first floated in the government's 2021 Heat and Buildings Strategy, this was an ambition to phase out the installation of new gas boilers as replacements in existing homes by 2035 (with an earlier target originally proposed for off-gas-grid homes). This is not the Future Homes Standard and does not specifically concern new-build homes.
• The 2035 target has been publicly softened — in September 2023, the then-Prime Minister announced changes to several Net Zero heating commitments, including adjustments to exemption thresholds for boiler replacement obligations. ****.
• No blanket ban on gas connections — neither policy removes existing homes' gas boilers, and neither prevents gas boiler servicing, repair, or like-for-like replacement in existing homes under current rules; the direction of travel is towards making new gas boiler installations progressively less likely over time, not an immediate prohibition on all gas heating.
• Clean Heat Market Mechanism — a scheme aimed at boiler manufacturers (not directly at installers or homeowners) intended to increase the proportion of heat pumps sold relative to gas boilers, related to the broader existing-homes decarbonisation push. ****.
• Hydrogen as an alternative — some manufacturers produce "hydrogen-ready" boilers, but no UK gas network currently supplies hydrogen to homes at scale, and government has deferred any mandatory hydrogen-ready boiler requirement — see hydrogen boilers for the current position.
• Devolved nations — Scotland, Wales, and Northern Ireland set their own building standards and heating decarbonisation policies; the Future Homes Standard specifically applies to England.
• Funding for existing homes — the Boiler Upgrade Scheme (BUS) currently provides a grant (£7,500 for air source/ground source heat pumps) to support existing homeowners moving away from gas boilers voluntarily — see bus grant guide — but this is a funding incentive, not a compliance deadline.

Quick Reference Table

Detailed Guidance

Untangling the two policies

The single most useful thing a tradesperson can do when a customer mentions a "gas boiler ban" is to ask which situation they mean: are they building or buying a new-build home, or are they thinking about replacing a boiler in an existing property? These sit under completely different policy and legal frameworks, and the answers — and the dates — are not interchangeable.

For new-build homes, the operative framework is the Building Regulations, specifically the Future Homes Standard's tightening of Part L and Part F. This is a regulatory requirement enforced through Building Control sign-off on new dwellings, not a general prohibition that reaches into existing housing stock.

For existing homes, no equivalent Building Regulations mechanism currently forces a homeowner to remove a working gas boiler or blocks a straightforward like-for-like replacement. The "2035" figure belongs to this second, much less concrete policy space — an ambition about the future installation of new (i.e. new-to-that-property) gas boilers as replacements, not a rule affecting new-build construction.

What the Future Homes Standard actually requires of a new-build

The standard does not read as a prohibition — it sets performance requirements for fabric efficiency, airtightness, ventilation, and carbon emissions that a new home must meet. In practice, meeting those requirements with a mains gas boiler as the primary heat source is not realistically achievable, because the standard is built around homes being "zero-carbon ready" — engineered so that, as the electricity grid decarbonises, the home's operational emissions fall towards zero without further retrofit work. A gas boiler, burning a fossil fuel on site, cannot deliver that outcome, so heat pumps (principally air source) become the default heating choice for compliant new-build design.

This has real practical consequences for new-build trades: heat pumps run at lower flow temperatures than boilers, so heating systems need to be designed differently from the outset — larger radiators or underfloor heating, careful heat-loss calculations, and proper commissioning, rather than a boiler swapped in like-for-like. See future homes standard for the full detail on fabric, ventilation, and heating design implications.

Where the "2035" figure actually comes from

The 2035 target originates from the government's 2021 Heat and Buildings Strategy, which set out an ambition to phase out the installation of new gas boilers — meaning replacement boilers fitted into existing homes when an old one fails or is due for renewal — by 2035, with an earlier target originally floated for homes not connected to the mains gas grid. This was never a Building Regulations mechanism and was not, at the time of its announcement, backed by a clear enforcement route comparable to Building Control sign-off.

The target has also been publicly revisited: in September 2023 the government announced changes to the pace and detail of several Net Zero-related heating commitments, including adjustments affecting boiler replacement obligations and exemption thresholds. Because this area has moved more than once and the underlying mechanism (largely aimed at manufacturers through schemes such as the Clean Heat Market Mechanism, rather than a direct rule on households) is different in kind from a Building Regulations standard, treat any specific date, percentage, or exemption figure associated with the existing-homes 2035 target as needing verification against the current government position before relying on it in a customer conversation. ****.

What tradespeople should say to customers today

For a customer building a new home: the relevant, concrete answer is that Building Regulations (via the Future Homes Standard, Part L and Part F) will in practice require a low-carbon heating system — plan for a heat pump, appropriately sized emitters, and a heat-pump-compatible hot water cylinder, not a gas boiler, and check the current Building Control position for the specific plot, since transitional arrangements can apply to schemes already in the planning pipeline.

For a customer with an existing gas boiler considering replacement: there is currently no Building Regulations rule preventing a like-for-like gas boiler replacement. There is a stated government ambition to reduce new gas boiler installations over time, and financial incentives (such as the Boiler Upgrade Scheme) exist to encourage a voluntary move to a heat pump now, but a specific compliance deadline forcing existing homeowners off gas boilers should not be quoted as settled law without checking the current position first.

Why this distinction matters for pricing and specification

Getting the two policies muddled has real commercial consequences. Quoting a new-build client as though gas boiler installation is still routine risks a Building Control failure and costly redesign later in the project. Conversely, telling an existing-homeowner client that they face an imminent, legally enforced deadline to remove a working gas boiler when no such enforced deadline currently exists risks unnecessary alarm, rushed decision-making, or a customer losing trust when they discover the "ban" is less concrete than described. Precision about which policy applies to which situation protects both the customer relationship and the quote.

Frequently Asked Questions

Can I still fit a gas boiler in a new-build home today?

Not if the home is being built to comply with the Future Homes Standard — the standard's fabric, ventilation, and carbon performance requirements are, in practice, not achievable with a gas boiler as the primary heat source, so Building Control sign-off would be at risk. Some homes already in the planning or construction pipeline before the standard's commencement may be covered by transitional arrangements — check the specific plot's position with Building Control before assuming either way. ****.

Is it true that gas boilers will be banned everywhere by 2035?

Not as a settled, enforced legal position. The 2035 figure refers to a policy ambition — set out in 2021 and subsequently softened — to phase out the installation of new gas boiler replacements in existing homes, not a blanket ban on all gas heating everywhere from that date. It is not the same mechanism as the Future Homes Standard, has no direct Building Regulations enforcement route currently confirmed, and its precise current status should be checked before being presented to a customer as fixed policy. ****.

Does the Future Homes Standard affect homes that are already built?

No. The Future Homes Standard applies to new-build homes going through Building Control from its commencement date; it does not require existing homeowners to remove or replace a working gas boiler. Existing homes are affected, if at all, by the separate (and less concrete) existing-homes policy direction discussed above, plus incentive schemes such as the Boiler Upgrade Scheme.

What should I fit instead of a gas boiler in a new-build?

An air source heat pump is the default choice for most new-build projects designed to meet the Future Homes Standard, alongside a heat-pump-compatible unvented hot water cylinder, appropriately sized radiators or underfloor heating for the heat pump's lower flow temperature, and Part F-compliant ventilation. See future homes standard and heat pumps for design detail.

Are hydrogen boilers a way to avoid moving to heat pumps?

Not currently, in practice. No UK gas network supplies hydrogen to homes at a meaningful scale today, and the government has deferred any mandatory hydrogen-ready boiler requirement pending further trials. A hydrogen-ready boiler installed today still runs on natural gas and would not, on its own, satisfy Future Homes Standard requirements for a new build. See hydrogen boilers for the current position and realistic timelines.

Regulations & Standards

• Building Act 1984 and The Building Regulations 2010 (SI 2010/2214) — the primary legislative basis for the Approved Documents referenced below.

• Approved Document L (Conservation of fuel and power) — tightened under the Future Homes Standard; the mechanism through which new-build heating and fabric performance is regulated.

• Approved Document F (Ventilation) — uplifted alongside Part L to ensure tighter new-build homes are properly ventilated.

• Future Homes Standard — government policy/standard for new homes in England, delivered through the above Approved Documents; commencement date ****.

• Heat and Buildings Strategy (2021) — the government strategy document that first set out the 2035 existing-homes gas boiler replacement ambition; subsequent announcements have amended aspects of this. ****.

• GOV.UK — The Future Homes Standard consultation and outcomes

• GOV.UK — Approved Document L (Conservation of fuel and power)

• GOV.UK — Approved Document F (Ventilation)

• GOV.UK — Heat and Buildings Strategy

• GOV.UK — Boiler Upgrade Scheme

• MCS (Microgeneration Certification Scheme) — heat pump installation and commissioning standards

• future homes standard — full detail on the Future Homes Standard's fabric, ventilation, and heating requirements for new builds

• hydrogen boilers — current status of hydrogen-ready boilers and realistic timelines

• bus grant guide — Boiler Upgrade Scheme grant for existing homeowners moving to a heat pump

• part l energy — Part L energy efficiency requirements in detail