Dune Gardens (Duintuinen) — the park starts at the front door.
Thousands of gardens along the dune edge become part of the national park: de-paved, native, pesticide-free. Dune biodiversity moves outward, the neighbourhood cools, and the drinking-water aquifer stays clean.
4.0×
Every euro Van Baarsen invests becomes four in the field
2%
Of qualifying contract value, fixed at contract level
€160k
Project ceiling for NP-PWN-04
Why this project.
Thousands of private gardens sit against one of the richest nature areas in the Netherlands. Together they cover more ground than the reserve beside them, and most of that ground is paved.
The project turns those gardens into an extension of the dunes: paving comes up, native planting goes in, and pesticides go out. Each garden is small. The number of them is what makes it a landscape.
Residents give to the project in their own region, and every euro is doubled by YOUR.earth and its nature-conservation partners before it is deployed.
The dune, pulled outward
Gardens together form one connected habitat for insects and birds, far beyond the park itself.
Less stone, more sponge
De-paved gardens absorb peak rainfall, cool the neighbourhood and relieve the sewer.
Protection at the source
Pesticide-free gardening protects the groundwater PWN turns into drinking water.
How we resotred nature
Plant
Co-financing the native "Wild & Inheems" range and resident subsidies.
De-pave
Tile-swap drives in priority neighbourhoods, garden by garden, street by street.
Demonstrate
Demonstration gardens and activation campaigns led by IVN.
Guide
Practical help for residents through jouwduintuin.nl.
Connect
Schools, employees and local businesses join as participant and co-funder.
Five parties with the same interest.
Van Baarsen Buisleidingen
Client · Investor
A family firm of 300 tradespeople, 70 years in underground pipe infrastructure. Level 5 on the CO₂ Performance Ladder and main contractor on the PWN contract.
CO₂ reduction is now the norm. Tenders will be won on demonstrable nature gain — and Van Baarsen intends to be the reference case.
PWN
Host · Beneficiary
Drinking-water utility for North Holland and manager of the dune reserves. In the dunes both roles meet: the landscape that carries biodiversity also filters the water.
Nature gain goes to the heart of PWN's own mission. A contractor who strengthens the dune is a partner in it, not a supplier.
Nationaal Park Zuid-Kennemerland
Lead partner · Initiator
Dune landscape on the North Holland coast, and the originator of Duintuinen: the idea that a garden can become a piece of national park.
Biodiversity does not stop at the park boundary. The greener the ring around it, the more robust the dune — but the initiative ran on annual grants.
IVN Natuureducatie
Lead partner · Activation & education
Nature-education organisation with local chapters, volunteers and years of experience in neighbourhood campaigns and school programmes.
A garden does not change because of a leaflet. It changes because of a neighbour who went first — and IVN delivers exactly that.
YOUR.earth
Programme owner · Fund · Verification
Part of the Regenerate the Economy group and owner of YE-STD-01. Runs the Nature-Positive Fund, fixes the baseline and measures the gain.
Without a yardstick, nature-positive is a marketing term. From 27 September 2026, EU directive 2024/825 restricts unfounded green claims. Measured, not promised.
What we measure, and how we prove it.
- Gardens convertedcount
- De-paved surfacem²
- Native plants placedcount
- Residents and businesses involvedcount
- Insect and bird activitycitizen science
- Realised multipliertarget 4.0×
Baseline
Recorded per neighbourhood before the first tile comes up.
Earth observation
Satellite imagery tracks greening at neighbourhood scale.
Field & eDNA
Samples confirm the species gain.
Annual report
One verifiable overview for PWN and Van Baarsen.
One euro that countsfour times.
Van Baarsen earmarks 2% of contract value, YOUR.earth doubles it, and the people who know the area double it again. Not sponsorship — a fixed, auditable part of the programme.
01 · Commit
€ 200.000
Van Baarsen Buisleidingen
2% of qualifying contract value, fixed at contract level.
02 · Match
€ 400.000
Fixed base
YOUR.earth
Doubles every euro 1:1 from the Nature-Positive Fund.
03 · Multiply
€ 800.000
Programme ceiling
Employees, residents, businesses
PWN, Van Baarsen and the neighbourhood double the combined amount again.
Budget
- Layer 1 — Van Baarsen investment20% share of the programme€ 40.000
- Layer 2 — YOUR.earth match1:1 from the Nature-Positive Fund€ 40.000
- Layer 3 — community donationsMatched up to the ceilingup to € 80.000
- Project ceiling€ 160.000
distribution
The guaranteed € 80.000, across five lines
- Native plant range & resident subsidies40% · € 32.000
- De-paving drives & neighbourhood greening20% · € 16.000
- Activation, demonstration gardens & education20% · € 16.000
- Baseline, monitoring & verification12% · € 9.600
- Programme management & contingency8% · € 6.400
