For developers

How bulk procurement pricing works for new-build solar PV

Per-plot pricing scales: indicative prices for 50, 100, 250 and 500-plot solar PV procurement under Part L 2026. Plus how factory pre-fit, in-roof systems and SAP/HEM pack inclusion change the equation.

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Bulk Solar PV Procurement Pricing for Developers — UK housebuilder solar PV procurement

Bulk solar PV procurement for housebuilders is materially cheaper than the retail benchmark. This page walks through the pricing logic: what drives per-plot cost, indicative ranges at different scales, and what is and is not included in a typical developer package.

What drives per-plot cost

Three factors dominate: panel and inverter procurement price (scales heavily with annual volume), site labour productivity (factory pre-fit cuts site time ~75%), and SAP/HEM modelling cost (a fixed cost amortised across the plot count). The fourth factor — overhead recovery — is meaningful but smaller.

Indicative pricing by scale

50 plots: £4,800–£5,600 per plot (3.4 kWp typical, in-roof, SAP/HEM included)
100 plots: £4,400–£5,100 per plot
250 plots: £3,950–£4,500 per plot
500 plots: £3,650–£4,150 per plot
1,000+ plots: £3,400–£3,850 per plot. All figures are 2026 prices for a typical 3-bed house type (42.5 m² ground floor → 17 m² panel area → 3.4 kWp). Larger arrays scale roughly linearly.

What is included

Panels, inverter, in-roof mounting, isolators, cabling, monitoring, commissioning, MCS certificate, SAP/HEM modelling, Building Control compliance pack, 20-year insurance-backed workmanship warranty, and the buyer-facing handover pack.

What is excluded (typically)

Battery storage (priced separately at £950–£1,400 per 5 kWh module), ASHP system (priced separately at £2,200–£2,800), MVHR (£2,400–£3,200), EV charger (£550–£800), and Building Control fees.

Factory pre-fit vs on-site install

Factory pre-fit assembles the in-roof mounting onto panelised roof cassettes off-site, delivered just-in-time. This saves ~£600–£1,000 per plot in site labour and weather delay — and is the default on volume sites. On-site install remains the option for one-off or small SME developments.

How we hold the price

Locked at procurement, no inflation clauses for 18 months. For multi-year schemes (500+ plots over 24+ months) we offer index-linked panel cost (LME aluminium, panel manufacturer index) with capped uplift.

40% of ground floor area

PV / ground floor area

Mar 2027

FHS in force

75%

CO₂ vs 2013 baseline

£4,350 per dwelling

Per-plot premium

For developers and housebuilders

Bulk solar pv procurement pricing for developers for volume new-build programmes

Per-plot pricing locked at procurement. Factory pre-fit on panelised roof cassettes. SAP/HEM modelling for every house type included. NHBC, LABC, Premier and Buildmark warranty-accepted workmanship. 20-year insurance-backed system warranty. We work with developers from 50 plots to 5,000+ across multi-site frameworks — agreed pricing, agreed programme, agreed warranty stack.

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How this fits into the FHS compliance pathway

Every FHS-compliant new build must pass three regulatory gates. Bulk solar pv procurement pricing for developers fits primarily into the second gate — design-stage Part L compliance — but has knock-on implications for Building Control sign-off and post-completion warranty:

1
Planning permission Most solar PV on new dwellings is consented within the dwelling\'s primary planning consent. Conservation Areas, Article 4 directions and listed-curtilage plots require additional planning consideration — we handle the planning evidence required for these.
2
Building Control — Part L compliance SAP 10.3 or HEM compliance modelling demonstrating Dwelling Emission Rate ≤ Target Emission Rate. PV specification, ASHP capacity, fabric U-values and air permeability all entered into the modelling. We provide the full compliance file ready for the Approved Inspector.
3
Post-completion — warranty & EPC MCS certificate, EPC, monitoring app onboarding and 20-year insurance-backed workmanship warranty. NHBC, LABC, Premier and Buildmark all accept our installation specification without query — important if you\'re relying on a structural warranty for buyer mortgageability.

For a fuller walkthrough of the compliance process, see our Part L 2026 page and the FHS PV calculator which sizes a compliant system from your ground floor area in 30 seconds.

Frequently asked

Developer & contractor questions

Answers to the questions we get most often when discussing bulk solar pv procurement pricing for developers with new clients.

How does FHS affect per-plot pricing for volume housebuilders?

Per-plot pricing is the dominant procurement model for FHS-compliant solar across UK housebuilders. The typical structure is a fixed per-plot price (covering supply, install and warranty) negotiated at land-bid stage, locked with inflation cap to a delivery window of 24–36 months. For a typical 3-bed semi, volume per-plot prices in 2026 run £4,800–£5,600 depending on site size, plot mix and supplier framework. Above 500-plot bulk orders unlock further discount through factory pre-fit programmes.

What's the contractor risk of getting FHS specification wrong?

Material — both at completion (Building Control refusing sign-off) and post-completion (NHBC reserving warranty against undersized systems). Specifications below the deemed-to-satisfy 40% PV threshold require enhanced fabric calculation backing in the SAP/HEM file. We see contractors most often caught out on (a) air permeability — design target of 3 missed at 5–6 due to detail failures; (b) ASHP sizing mismatched to building heat loss; (c) PV array placement that doesn't hit the 40% requirement on geometry grounds.

When does the Future Homes Standard come into force?

24 March 2027 in England, with a 12-month transitional period running to 24 March 2028 for projects already under construction. The Approved Documents L and F were published on 24 March 2026 (Government statement HCWS1445), giving the industry exactly 12 months of certainty before regulatory commencement. Scotland, Wales and Northern Ireland are following with broadly equivalent regulations on roughly aligned timetables, although devolved nuances apply — Welsh regulations are typically 6 months ahead.

What does FHS-compliant solar PV actually cost per plot?

The Government Impact Assessment puts the total FHS premium at ~£4,350 per dwelling per dwelling (2025 prices, weighted average across heat pump, solar PV, MVHR and enhanced fabric). Of that, solar PV is roughly £4,200 — covering ~3.4 kWp for a typical 3-bed semi (panels, in-roof mounting, inverter, monitoring, MCS certification and 20-year insurance-backed warranty). Larger dwellings cost proportionately more; volume procurement reduces per-plot cost by 20–25%.

FHS 2027 deadline approaching

Get developer-volume pricing

Tell us your plot details — ground floor area, location and target start-on-site date. We return a fully-costed system sized to Part L 2026 (40% PV rule), with the SAP/HEM compliance pack included.

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