Passive House Builder London

Q: Do you only work in London?

No. London is our base, and we work across the South East, including Surrey, Berkshire, Buckinghamshire, Hertfordshire and Oxfordshire.

If you are looking for a Passivhaus builder or eco house builder in London, Path-50 builds high-performance, low-energy homes across the capital and the South East, using a fabric-first approach. We look at the house as a complete system: insulation, airtightness, thermal bridging, ventilation and building services are planned together, not treated as separate items. We manage and coordinate the design, engineering and construction process, so one team looks after the whole project.

Path-50 is led by a Certified Passive House Tradesperson and is a member of AECB and the Passivhaus Trust.

Speak to Path-50 about your project. No obligation.

What we build in London and the South East

Passive House and low-energy new builds, Bespoke homes designed around a fabric-first approach. Where a project is going through Passive House certification, we build to that target.
Timber and CLT construction, Timber construction can help reduce embodied carbon compared with conventional structural systems, and prefabricated components suit precise, well-coordinated detailing.
Straw-bale homes (EcoCocon), Prefabricated panels with high insulation and a bio-based wall build-up.
Managed delivery, One team managing and coordinating each stage, from early design to completion on site.

Our fabric-first approach

Performance depends on the building fabric and on how well it is built. Our focus:

Airtightness – Treated as part of the construction process, not just a test at the end.
Insulation continuity – Planned from the design stage, so the thermal envelope has no weak links.
Thermal bridges – Minimised from the design stage through to construction.
Critical details – Junctions and details are coordinated before they reach site and checked repeatedly during the build.
Ventilation and building services – Considered alongside the fabric, as part of the same system.
Site quality – Attention to detail on site is fundamental to achieving the performance that was designed.

How it works

Consultation

Discuss your vision and explore all possibilities together.

Design

Tailored designs created to match your preferences and goals.

Technical Stage

Engineers produce detailed technical designs for your home build.

Contract Signing

Finalise your project timeline with approved designs and costs.

Construction

Efficiently building or retrofitting your home while keeping you updated.

Common Questions

What is a Passive House?

A building designed to meet a strict energy-performance standard, using high levels of insulation, airtightness, quality windows and ventilation with heat recovery.

Is every Path-50 home a certified Passive House?

No. Certification is specific to each project. Where a project is going through certification, we build to that target. Other projects follow the same fabric-first principles.

Can you build on a small London plot?

Often, yes. Timber systems suit tight city sites. We check this before you commit.

Do you only work in London?

No. London is our base, and we work across the Southeast, including Surrey, Berkshire, Buckinghamshire, Hertfordshire and Oxfordshire

How long does it take?

It depends on the size and site. Parts are made off site, so there is less time on site than a traditional build.