The UK government published its response to the Future Homes and Future Buildings Standards consultation in December 2023. New homes must be zero-carbon ready from 2025. Existing buildings get a phased timeline through 2027. If you sell anything related to energy efficiency, heat pumps, solar, insulation, or smart building controls, your pipeline just got a regulatory tailwind.
But here's the thing. Most of your competitors will send the same generic email: "Are you ready for the new regulations?" That email gets deleted. The founders and SDRs who win will be the ones who find the right person, at the right company, with the right timing.
Here's how we'd build that list.
Who actually has to act
The regulation applies to three groups, and they move on different timelines.
- Housebuilders and developers — they need to comply with Part L and Part F of the Building Regulations from June 2025. The Future Homes Standard itself kicks in for new builds from 2025. These companies are already planning their 2025 spec now. Their procurement cycles are locked in 12–18 months ahead of construction start dates, meaning the window to influence their material and system choices is closing rapidly. If your product requires structural integration or M&E coordination, missing the current specification round effectively locks you out until the next development phase.
- Commercial property owners and landlords — the Future Buildings Standard applies to non-domestic buildings. Minimum energy efficiency standards (MEES) are tightening. If they own a building with an EPC below C, they have a deadline. But the real pressure point is the trajectory: MEES will ratchet toward EPC B by 2030, and the Future Buildings Standard introduces fabric efficiency targets that cannot be met through bolt-on measures alone. Owners must now decide between deep retrofit cycles or disposal of underperforming assets. Their buying process is fragmented across asset managers, facilities teams, and external consultants, each with different approval thresholds.
- Architects and specifiers — they write the specifications. If your product isn't in the spec, you don't get the order. They need to know what works under the new standards. However, their risk calculus is shifting: the transition from Approved Document L 2021 to the 2025 standards introduces new compliance pathways that penalise over-reliance on single-point solutions. Specifiers are now cross-referencing thermal bridging, air permeability, and ventilation heat loss as an integrated system. Products that simplify this compliance arithmetic—by reducing the number of interfaces or providing pre-validated performance data—gain disproportionate traction in their specifications.
Each group has a different buying process. Housebuilders buy in bulk. Commercial landlords buy project-by-project. Architects influence but don't sign purchase orders. Your outreach needs to match the buyer. More critically, the regulatory timeline creates a cascading effect: housebuilders' decisions in Q1 2025 constrain architects' specifications for the following 18 months, while commercial owners' retrofit decisions lag by a full regulatory cycle. Understanding these lead-lag relationships is what separates outreach that lands from outreach that bounces.
How to find the decision-makers
We built a list for a customer selling heat pump systems to UK housebuilders. Here's the workflow we used.
First, we identified the top 50 housebuilders by unit volume. That's public data from NHBC and the Home Builders Federation. Then we used company databases to find the technical directors, sustainability managers, and procurement leads at each one. The key insight here is that the Future Homes Standard (FHS) consultation, which closed in March 2024, explicitly mandates a 75–80% reduction in carbon emissions from new homes by 2025. That means the decision-makers you need are not just the sustainability team — they are the people who sign off on building regulations compliance. Technical directors are the gatekeepers because they must ensure every new development meets Part L and the upcoming FHS uplift. Procurement leads are equally critical because they control the supply chain for heating systems, and they are already under pressure to lock in contracts before the 2025 implementation deadline.
Second, we looked for signals. Companies that had already published sustainability reports. Companies that had hired a head of net zero. Companies that had announced pilot projects with heat pumps or solar. Those are the ones already spending money. But we also cross-referenced these signals against the FHS consultation timeline. For example, housebuilders that submitted responses to the consultation — especially those advocating for a phased transition rather than a hard 2025 cutover — are the ones most likely to be actively planning their compliance strategy. They are not waiting for the final legislation; they are already testing heat pump integrations and grid capacity assessments. That makes them higher priority than firms that have only published generic net-zero pledges.
Third, we checked their inbox scoring. A technical director at a top-10 housebuilder who has been searching for "heat pump specification 2025" is a warmer lead than one who hasn't. We use inbox scoring to prioritise who gets a call first. The regulatory context sharpens this further: the FHS consultation proposes removing the option for gas boilers entirely in new builds from 2025. That means any technical director who is actively researching heat pump specifications is not just curious — they are likely preparing for a mandatory shift. Their inbox activity signals they are in the specification phase, which is the narrow window where your product can influence their procurement criteria. A director who has not searched for these terms is probably still relying on gas boiler suppliers or waiting for the final regulations to be published. They are not ready to buy.
The result was a list of 120 contacts across 35 companies. Not 5,000. 120. That's a pipeline you can actually work.
What to say in the first email
The template above works because it sidesteps the common trap of reciting the regulation's effective date. Your prospect's inbox is already flooded with "Part L is coming" alerts. Instead, the email anchors on a concrete, unresolved operational gap: their 2025 specification for a specific product category. This forces them to confront the procurement and design timeline, not just the compliance deadline. The reference to their unit count and region is critical — it signals you've done the work to map their pipeline against the Future Homes Standard's staged implementation. Without that specificity, the email reads as a mass blast.
The social proof point ("We've been helping [similar company] achieve compliance") does more than build credibility. It implicitly acknowledges that the path to compliance is not a single product purchase but a process of iterative testing and documentation. Many builders are still wrestling with the transition from SAP 10.1 to the updated methodology, and your offer to share "what we've learned" positions you as a guide through that procedural complexity, not just a vendor. The five-day follow-up is equally deliberate: it shifts from a meeting request to a low-friction offer of a checklist, which respects their decision-making cycle. At this stage, most firms are still auditing their existing supply chains against the new fabric efficiency standards, so a checklist aligns with their internal review process rather than interrupting it.
Why timing matters more than product
The companies that will buy from you are the ones that have already started planning. The ones that haven't started yet won't buy until Q3 or Q4 2024 at the earliest. Don't waste time on them now.
How do you know who's planning? Look for job postings. A housebuilder hiring a sustainability manager is about to spend money. Look for RFPs. They're public for some local authorities. Look for planning applications. If they've submitted plans for 2025 delivery, they need to spec the building services now.
We wrote about this approach in Your Competitor Read Their Website. You Didn't. The same principle applies here. The signal is public. You just have to look.
But timing isn't just about when a buyer starts planning—it's about when their regulatory window closes. The Future Homes Standard mandates that from 2025, new homes must produce 75–80% fewer carbon emissions than current Building Regulations allow. That means every developer with a 2025 delivery date is already locked into a procurement cycle that began six to twelve months ago. If you approach them now, you're not early; you're late. The real opportunity lies with developers targeting 2026 completions. They are currently in the feasibility and design phase, where specifications are still fluid. Their architects are modeling fabric efficiency, heat pump integration, and ventilation strategies. If you don't engage them before they submit their Building Regulations Part L compliance calculations, your product becomes a retrofit, not a specification. That's a harder sell. The signal you need to track isn't just "who is hiring" but "who has not yet submitted their SAP calculations." Those are the accounts where your solution can still be designed in, not bolted on. Prioritize them now, or lose the window entirely.
What we'd do next
If we were running outbound to this market today, we'd build a list of 100–150 contacts across the three groups above. We'd prioritise the ones with clear buying signals. We'd send a short, specific email that shows we've done our homework. And we'd track which companies are hiring, publishing, or submitting plans — because those are the ones ready to buy.
But the real leverage lies in understanding the regulatory rhythm. The Future Homes and Buildings Standard isn't a single event; it's a phased rollout with staggered compliance deadlines. A contact at a housebuilder who just posted a job for a "Net Zero Compliance Manager" is signalling internal capacity building — likely six to twelve months from procurement. Conversely, a firm that has already submitted planning applications referencing the 2025 uplift is further along the buying cycle. We'd segment our list by these signals: early-stage (hiring, publishing thought leadership), mid-stage (submitting plans, consulting on specification changes), and late-stage (tendering for materials or software). Each segment gets a different email angle — one focused on future-proofing, another on immediate compliance gaps. We'd also monitor consultation response documents and trade press for mentions of specific suppliers or technologies; those mentions are direct purchase intent. The key is to treat the regulatory timeline as a sales calendar, not a news item. Every published amendment or delayed enforcement date reshapes who buys and when. By mapping your outreach to these inflection points, you move from generic prospecting to precision timing — and that's where conversion rates compound.
If you want to build that list faster, give MiraReach a try. It finds the prospects, scores their inboxes, and drafts the email. You press send.
— Mira