URBAN GREENING · SOCIAL VALUE · UK CITIES
Every contract is a chance to leave a greener city behind.
Carbon Heroes helps UK public sector suppliers turn tree sponsorship into quantified social value — and generate bid-ready submissions for the frameworks councils actually use.
Build Your Free PlanTrusted by councils & partners across the UK
OUR MISSION
We are on a mission to transform urban landscapes and improve the quality of life of millions of urban residents.
By making it easier for public sector suppliers to invest in urban trees, we help regenerate UK cities — one contract, one canopy, at a time.
See how it works →
Supporting urban trees helps your city:
CLIMATE RESILIENCE
Tackle climate change locally
Urban trees regulate heat islands, reduce flood risk, and sequester CO₂ — delivering measurable ecosystem services benchmarked against HM Treasury Green Book data.
SOCIAL VALUE
Improve wellbeing for everyone
Green spaces improve mental health, restore equal access to nature, and generate quantified social value aligned to PPN 002 and local authority frameworks.
LOCAL ECONOMY
Support local supply chains
Every sponsorship routes spend through local SMEs and VCSEs — generating Social Value Model SRM 3a spend multipliers that councils recognise and score highly.
THE PLATFORM
From contract details to bid copy — in under 10 minutes.
Enter your contract details
Contract value, duration and location. Takes 30 seconds.
Answer three quick questions
Your social value target, delivery location, and which procurement framework your tender uses.
Refine your tree portfolio
Our calculator recommends a starting mix of tree types. Adjust the numbers — your SROI and KPIs update live.
Export your bid submission
AI writes the copy formatted exactly for your chosen framework. Export to PDF with a unique Carbon Heroes project ID and timestamp.
The numbers behind every tree.
£2,831
Social value per new tree planted per year
8.89x
SROI on mature tree maintenance
70m²
Greenspace created per typical annual portfolio
<10m
Average time from blank page to bid-ready copy
All values independently benchmarked against PPN 002, HM Treasury Green Book and CABE standards.
REAL WORLD IMPACT
Tiny Forest, Real Impact.
In collaboration with AWS, NiCE, Route 101 and Earthwatch Europe, Carbon Heroes supported the creation of a Tiny Forest at Oasis Academy Connaught School in Filwood — transforming an underutilised urban space into a long-term social value asset for the community.
FAQS
Common questions
Tree sponsorship social value is the monetised benefit that urban tree planting and maintenance generates for communities — covering health, wellbeing, air quality, flood prevention and biodiversity. It is calculated against HM Treasury Green Book methodology and PPN 002 guidance.
We currently support PPN 002 (Central Government), the TOMs Framework (National), Camden Social Value Matrix, Richmond Social Value Questions and Wandsworth Social Value Questions. New frameworks are added regularly.
Once you've defined your tree portfolio and SROI values, our AI uses Anthropic Claude to draft submission copy formatted precisely to your chosen framework's section structure, language requirements and word-count guidelines. You review, edit and export.
Most users go from entering their contract details to a completed, formatted bid-ready PDF in under 10 minutes. The AI handles the heavy lifting — you just confirm the numbers and review the copy.
Yes. Every value used in our calculator is independently benchmarked against PPN 002 guidance, HM Treasury Green Book data and CABE standards. We publish our full methodology so you can cite the source in your submission.
Yes — you can build your full tree portfolio plan and see your SROI and KPI calculations for free, with no credit card required. PDF export and bid copy generation are available on paid plans.
Ready to make your next bid count for the planet?
Join suppliers already using Carbon Heroes to deliver real urban greening through public sector contracts.
Start Building Free →No credit card · No commitment · Bid copy in under 10 minutes