European building platform · Belgium

Energy positive homes.
Built as a product.

Delivered in 8–10 weeks. Fixed price. E-level −9.
A standardised building system — SIP panels, timber frame — produced in Belgium and deployed by regional partners across Europe.

Find a project near you Build with the system
Energy performance · Nest 1.0 Verified · EPB certified
E-LEVEL
E −9 / max E 30
S-LEVEL
S 21 / max S 28
OVERHEATING RISK
4,580 Kh / max 6,500 Kh

This home produces more energy than it consumes. Not a claim — a certified number.

8–10 weeks on site
Fixed price — no surprises
Produced in Belgium
2 regional partners · expanding
E-level −9 · EPB certified

Who is Okto.green for?

Three ways in.
One building system.

For buyers

Find your energy positive home

Browse active projects across Belgium — each one built on the Nest system with a verified E-level and a regional partner behind it. Fixed price. No construction surprises.

Find a project

For developers

Build with the system in your region

Become a regional partner. You own the land, the sales and the local relationships. Okto.green provides the building system, technical support, supplier contracts and marketing tools.

Become a partner

For municipalities

Deliver sustainable housing at scale

Okto.green works with Belgian municipalities on social and sustainable housing developments — with verified energy performance, transparent documentation and fast delivery timelines.

Plan a development

The building system

Not a construction firm.
A system.

01

Standardised design

Every Okto.green home is built on the Nest system — Nest 1.0 or Nest 2.0. The design is fixed. The performance is guaranteed. No improvisation.

Nest 1.0 / 2.0
02

The Okto.green Building System

Glulam, Kerto LVL, engineered I-joists, SIP panels with BLUE PIR core — all produced in Belgium, all pre-engineered. Assembled dry on site by a 3-person team.

Produced in Belgium
03

8–10 weeks on site

A trained assembly team completes the full build from foundation to finished structure in 8 to 10 weeks. That is the timeline. That is what gets delivered.

Fixed timeline
04

Verified energy performance

Every home is EPB certified. E-level −9. S-level 21. Overheating risk within limits. The numbers are public. You can verify them before you buy.

EPB certified

Active projects

Built by regional partners.
Verified by Okto.green.

All projects
Watou Nest 1.0 Permit submitted Nest 1.0

Watou, West Flanders

Watou — Gebroeders Faesstraat

Units 2
Size ±106 m²
E-level E −9
Availability TBC

Alkon BV

View project
Handzame Nest 2.0 In development Nest 2.0

Handzame, West Flanders

Handzame — Handzameplein

Units 2
Size ±151 m²
E-level E −9
Availability TBC

Arber Construct

View project
Ieper site plan Stedenbouwkundig attest (planning certificate) 11 units

Ieper, West Flanders

Ieper — Meenseweg

Units 11
Size 78–106 m²
E-level E −9
Availability TBC

Arber Construct

View project

Production & system

Produced in Belgium.
Built across Europe.

Every SIP panel in every Okto.green home is manufactured in Belgium. The building system — Nest 1.0 and Nest 2.0 — is engineered once and deployed by regional partners wherever the system scales.

E −9
Energy level · EPB certified
8–10w
Assembly time on site
S 21
Shell insulation level
100%
SIP panels — made in Belgium

What every Nest home includes

SIP panels — structural insulated Standard
Timber frame construction Standard
Heat pump + PV installation Standard
Rainwater cistern — 5,000 L/unit Standard
EPB report — certified energy data Every home
Public permit documentation Transparent

For regional developers

Build energy positive homes
in your region.

As a regional partner, you bring the land, the local market knowledge and the sales. Okto.green brings the building system — SIP panels, technical protocols, supplier contracts and platform support. You keep 50% equity. The system scales with you.

Become a partner How the system works