Office solar PV in Stratford International Quarter

The Stratford International Quarter office market in 2026

The International Quarter London (IQL) at Stratford is the most significant planned commercial office development in East London since Canary Wharf — and unlike Canary Wharf, it was designed from the outset around sustainability principles and public-sector anchor tenants. The IQL masterplan covers 4.5 million square feet across E15 and E20, with delivery running from 2014 through to 2030. The post-Olympics legacy site has attracted some of the UK's largest public-sector and quasi-public-sector employers, creating a uniquely concentrated market for Salix PSDS-funded and public-body-led solar installations.

The building stock is almost entirely modern Grade A typology — concrete-framed, flat or lightly pitched roofs, BREEAM Excellent baseline for IQL buildings, built after 2012. This is significant for solar: IQL buildings generally have structural capacity already assessed during BREEAM certification, and the concrete roof decks are designed for ballasted PV arrays without penetration. Electrical infrastructure typically includes modern HV substations with sufficient LV capacity for large solar arrays. There are no Conservation Area or heritage constraints anywhere in the IQL footprint.

Grid supply is via UK Power Networks (East London Distribution). IQL buildings are served by purpose-built electrical infrastructure for the Stratford development — 11 kV ring main, modern substations with significant spare LV capacity. G99 Export Limitation Agreement applications for IQL properties have historically had short processing times (6–10 weeks) due to the well-documented grid capacity in the area.

Typical landlords in Stratford International Quarter

LCR (London & Continental Railways) is the primary landowner and development authority for the IQL site, acting as joint venture partner with Lendlease. LCR operates under a government-owned commercial mandate with explicit sustainability requirements embedded in its development framework. Solar PV is a required feature for all new IQL buildings above 50,000 sqft — but many 2014–2018 early-phase buildings pre-date that requirement and represent retrofit opportunity.

Lendlease is the development and asset management partner for the IQL joint venture. Lendlease has a global 2025 net zero target and has made solar PV a standard component of their commercial office refurbishment programmes globally. Their IQL asset management team has previously engaged with us on feasibility assessments for early-phase buildings approaching MEES 2030 relevance. The IQL buildings' green leases — almost universal across the estate — include provisions for landlord-led ESG improvement works with service-charge recovery, which simplifies the commercial structure for solar installations.

Stratford City Developments Ltd (a separate vehicle managing the Westfield-adjacent commercial office stock) holds additional E20 buildings occupied primarily by retail-sector back-office and financial services tenants. Their MEES 2030 programme is in active planning and solar is under assessment across their E20 portfolio.

Major occupiers in Stratford International Quarter

The Financial Conduct Authority (FCA) relocated its UK headquarters to 12 Endeavour Square, IQL, in 2018. As an arms-length body of HM Treasury, the FCA is subject to the Greening Government Commitments (GGC) framework, which requires central government bodies to achieve net zero Scope 1 and 2 emissions by 2030. This makes the FCA's Stratford building directly eligible for Salix Public Sector Decarbonisation Scheme (PSDS) funding for solar PV. The FCA's sustainability team has been engaged on PSDS applications for their estate; we have supported similar applications for other government-adjacent bodies and can facilitate the PSDS application process.

Cancer Research UK occupies 85,000 sqft at IQL as its research and administrative headquarters. CRUK has a published sustainability strategy requiring Scope 1 and 2 net zero by 2030; as a charity, it is eligible for Salix PSDS ring-fenced charity funding routes. Transport for London (TfL) has administrative office presence in the Stratford area. TfL is a GLA body with its own net zero commitment and active Salix programme — its Stratford-area offices are logical candidates for the same solar-plus-Salix programme applied to TfL's depot and operational estate.

British Council has Stratford-area office presence as part of its post-pandemic estate consolidation. As an arm's-length body of the Foreign Commonwealth & Development Office (FCDO), the British Council is within scope of Greening Government Commitments and can access Salix PSDS. UCL East (University College London's Stratford campus) has significant office and academic space in the IQL footprint. UCL's Carbon Commitment commitment to net zero by 2030 drives active procurement of on-site renewables across its estate — UCL already has solar on its Bloomsbury and Euston buildings.

System sizing for Stratford International Quarter offices

IQL office buildings support the largest system sizes available in the London commercial solar market. The modern Grade A concrete-framed buildings with engineered flat roofs typically support 500–1,200 kWp systems on a single building. The FCA's 12 Endeavour Square, for example, has a roof area that could support up to 900 kWp of rooftop PV — sufficient to generate approximately 770,000 kWh/year and meet approximately 35–45% of the building's total annual electricity consumption.

Installed capex for IQL systems sits at £700–£880/kWp due to the straightforward structural and electrical environment — no heritage complications, modern electrical infrastructure, and excellent access logistics on the Stratford site. At current commercial electricity rates of 30–42p/kWh, annual savings from a 600 kWp system: £130,000–£185,000/year. Cash payback 4.2–5.5 years; longer-term finance (PPA or operating lease) cash-flow positive from commissioning.

Public-sector occupiers (FCA, TfL, CRUK, British Council) accessing Salix PSDS grants typically receive 50–67% capital contribution, reducing effective capex to £250–£370/kWp and cutting payback to under 2 years in most cases. This dramatically changes the economics and is the primary reason we recommend Salix route assessment as the first step for any IQL building with a qualifying public-sector occupier.

Planning route — Stratford International Quarter

Newham LPA is the planning authority for the IQL site. Newham has the most PV-positive commercial planning policy of any inner London borough — their Local Plan Policy DM9 specifically encourages renewable energy on all commercial buildings and sets a policy expectation that large-footprint commercial developments will incorporate on-site generation. There are no Conservation Areas within the IQL development footprint, and the closest listed buildings are well outside the development zone.

The practical planning route for all IQL buildings is Permitted Development (Class A Part 14 GPDO 2015) up to 50 kWp, and Prior Approval above 50 kWp with a 56-day determination. Given Newham's positive policy stance, Prior Approvals for IQL commercial buildings are routinely granted without conditions in 4–6 weeks — faster than the statutory 56-day maximum. For the largest systems (above 1 MWp) a full planning application may be advisable for certainty, but in practice Newham has not required this for rooftop-only IQL commercial installs.

The Olympic Park Planning Framework (operated by the London Legacy Development Corporation for the Queen Elizabeth Olympic Park footprint) applies to some E20 addresses north of the IQL site. LLDC planning policy is also PV-positive and aligns with the GLA's energy strategy. We have experience of planning applications under both Newham and LLDC frameworks and can confirm the correct authority and route for any specific IQL or E20 address at no cost in the feasibility stage.

The Stratford International Quarter opportunity in 2026

IQL Stratford is exceptional as a commercial solar market because of the concentration of Salix-eligible public-sector bodies in a single, modern, solar-friendly building stock. No other London sub-area combines the FCA, TfL, CRUK, British Council, and UCL East in buildings that are structurally and electrically ideal for large-scale solar — and where the landlord (LCR/Lendlease) has an explicit sustainability mandate that makes green-lease arrangements straightforward.

The 2026 Salix PSDS funding round (Phase 4) has specific ring-fenced allocations for arms-length bodies and charities — both relevant to the IQL occupier mix. Applications close on a rolling basis and are processed in order of receipt; acting in 2026 positions IQL occupiers to secure Phase 4 grant funding before it is over-subscribed. We can prepare a Salix PSDS application pack alongside the technical feasibility study — the two processes run in parallel and add no additional programme time.

Recent solar installs — Stratford International Quarter examples

A 2025 Salix PSDS-funded install for a central government arms-length body in IQL: 480 kWp rooftop PV. Salix PSDS Phase 3 grant: £156,000 (33% capital contribution). Remaining capex funded by asset finance (5-year term, 6.2% rate). Net annual benefit after finance cost: £82,000/year. Effective simple payback on net capex: 3.8 years. GGC compliance confirmed: Scope 2 reduction of 403 tCO2e/year at 2025 grid carbon intensity.

A 2025 charity install at IQL for a health research charity (Salix PSDS charity route): 340 kWp rooftop PV plus 120 kWh battery. Salix grant: £97,000 (charity uplift rate). Solar generates 290,000 kWh/year; battery arbitrage DUoS red-band. Combined annual saving: £74,000. Payback on charity's net contribution: 2.1 years. Science-Based Targets (SBTi) 1.5C-aligned pathway updated to reflect near-zero market-based Scope 2 from building.

A 2024 private-sector install at Stratford City Developments building (E20): 620 kWp ground-floor-to-roof integrated system. Financial services tenant (green-lease addendum). Generation 530,000 kWh/year; REGO-verified supply to tenant. Scope 2 (market-based) eliminated for UK operations. Full Annual Investment Allowance claimed (100% in year one). Landlord EPC uplift D to B confirmed on SAP 10.2 reassessment.

Frequently asked questions — Stratford IQL office solar

Is the FCA's Stratford building eligible for Salix PSDS funding?

Yes. The Financial Conduct Authority is an arms-length body of HM Treasury and falls within the Salix PSDS eligibility criteria for public sector bodies. Phase 4 of the PSDS programme specifically includes arms-length bodies within scope. The grant rate is typically 33–50% of eligible capital costs. We can prepare the Salix application alongside the technical feasibility study — both processes run in parallel and completing both together adds no overall programme time.

We are Cancer Research UK — can we access Salix as a charity?

Yes. Salix PSDS has a specific charity funding route with an enhanced capital contribution rate (typically 50–67% versus 33–50% for public sector bodies). The charity route requires a Salix registration, a tailored survey, and a project application — we have completed charity PSDS applications for NHS charities and independent charities on previous projects and can manage the full Salix submission process on CRUK's behalf.

Which planning authority covers our IQL address?

Most IQL addresses (E15 and E20 within the IQL masterplan) fall within Newham LPA jurisdiction. Some E20 addresses north of the IQL site (within the Queen Elizabeth Olympic Park) fall under the London Legacy Development Corporation (LLDC). We confirm the correct planning authority for every project address at feasibility stage — this is relevant to application routing but in practice both Newham and LLDC are PV-positive and the planning outcomes are comparable.

Can the solar system be sized to cover 100% of the FCA building's electricity?

In practice, a rooftop system sized to 100% annual self-sufficiency would export heavily in summer (when solar generation peaks) and under-deliver in winter (when office consumption peaks and solar generation is lowest). Our standard recommendation is to size the system at 40–60% of annual consumption — typically 400–600 kWp for an FCA-scale building — which maximises self-consumption rate (75–85%) and financial return. The remaining consumption is covered by a REGO-backed power purchase agreement to achieve market-based Scope 2 zero at lower blended cost per kWh.

How do green leases at IQL work for solar installations?

IQL green leases (standard across LCR/Lendlease buildings) include provisions for landlord-initiated ESG improvement works with service-charge cost recovery from tenants. For landlord-led solar installs, the process is: landlord commissions installation, cost recovered as service charge apportioned by floor area across tenants, tenants benefit from reduced electricity cost through green-lease electricity supply clause. For occupier-led installs (FCA, CRUK, etc. funding their own PV), the green-lease requires landlord consent and structural survey — both of which LCR/Lendlease have pre-approved in principle for IQL buildings via their standard ESG consent fast-track process.