Trades master copy
Last reviewed: March 2026
You're ahead of most small builders just by caring about this. The rules are still bedding in, but the direction is clear.
What it actually is
The Future Homes and Buildings Standard is the government's plan to make new homes much lower carbon. It's not a totally new Part - it mainly tightens Part L (energy) and some linked services.
Think of it as: the SAP targets get tougher, gas boilers fade out on new builds, and there's more pressure to prove things are commissioned properly.
You should expect it to show up first on:
- New estates and larger schemes.
- Any job where the client mentions "Future Homes" or "net zero ready".
What changes for you (in plain English)
On site, the big shifts are:
Less gas, more low-carbon kit
- Heat pumps (air-source mainly) become the default for new homes.
- Systems run at lower flow temperatures, so radiators and underfloor need sizing properly - no more "stick a couple of rads in and hope".
Tighter fabric and airtightness
- U-values and thermal bridge details are stricter again.
- Airtightness targets drop - you'll need cleaner detailing around windows, membranes and penetrations, not just expanding foam and a prayer.
On-site renewables become normal
- PV on the roof moves from "nice extra" to "baked into the SAP design" on a lot of sites.
- You'll see more specs where the SAP calc only works because there's a certain PV area on the plans.
More emphasis on commissioning and handover
- Extra weight on doing the commissioning properly (heating curves, MVHR flows, controls) and proving it.
- "Home User Guides" and better handover info so buyers know how to run the place efficiently - not just a pile of manuals in a kitchen drawer.
What to do now (so it doesn't blindside you)
You don't need to rewrite your life, but it's worth nudging your set-up in this direction now:
On fabric and airtightness
Aim to beat current Part L minimums, not scrape them.
Get your lads used to:
- Taping around windows and doors.
- Treating membranes as "critical parts", not bin liners.
- Checking insulation is full-thickness and tight, not gappy.
On heating and services
Start working more often with heat pump-friendly designers - low-temp systems, bigger emitter areas, good zoning.
Give yourself time and budget for proper commissioning:
- Setting curves, balancing, MVHR flows.
- Recording readings for the SAP/hand-over pack.
On solar and electrics
Assume PV will be on more roofs. Coordinate early:
- Roof layout (no random vents, flues, rooflights scattered where the panels want to go).
- Cable routes and consumer unit capacity.
- Tie it in with Part S (EV charging) and Part R (broadband) - all the "kit on the wall" wants space and clear routes.
On paperwork
- Get used to the idea that SAP, commissioning certs and a simple "how it works" note are part of the job, not a favour.
- If the spec says "Future Homes-ready" or similar, push the designer for clear written targets and responsibilities up front.
How this links to Part L
If you're reading this from the Part L guide: this is the direction of travel for Part L over the next few years. The fabric, airtightness and services stuff you're already doing for current Part L is the foundation. Future Homes just tightens the screws and expects you to do it more consistently.
Practical bottom line: if you can build clean, airtight shells, fit properly commissioned low-carbon heating, and handle PV and EV without drama, you'll be in a very good place as these standards land.
This guide was last reviewed March 2026. The Future Homes Standard is subject to change - check gov.uk for the latest consultation documents and implementation dates. SiteKiln does not provide legal, financial or tax advice. All content is for general information purposes only. Always seek professional advice for your specific situation.
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Working in Wales? The building rules are different. See our Working in Wales guides.
Working in Scotland? Building standards work differently. See our Working in Scotland guides.
Working in Northern Ireland? The system uses Technical Booklets. See our Working in Northern Ireland guides.
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