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Buildpass provide sustainability and energy performance support in the built environmentBuildpass provide sustainability and energy performance support in the built environment

As leading building energy, sustainability and compliance specialists we help architects, developers and self-builders develop sustainable and low carbon construction projects from concept to occupation.


Sustainability is at the heart of everything we do

Energy and Sustainability Services under one roof

Buildpass is your complete energy and sustainability consultant helping progressive architects, developers and self builders deliver low energy, zero carbon construction projects in a simple, cost effective way.

We are Buildpass and we’re here to help you conquer the world of energy performance, low carbon construction and sustainability. From building regulations compliance to Passivhaus and whole carbon lifecycle, we’ll help you get it right and navigate the complexities. You’ll meet planning and building control requirements, reduce your risks, cut your build costs, reduce your running costs and tick all the boxes, whilst doing your bit for the environment.

Together we will build better spaces to live and work.

Whether you select one of our services or make the most our dedicated whole project lifecycle consultancy you’ll be able to focus on what you do best because you’ll know compliance, testing and certification are all taken care of. We work on schemes as small as domestic refurbishments and as large as new build community schemes, and everything in between


Do you have a retrofit project? Please take a look at our dedicated retrofit page.

Ticking boxes is just the start. Whether you’re homeowner, self-builder, architect or developer, we have a package to suit. We will help you reach your green goals.

Save Time and Money
Integrate energy efficiency into the initial design, saving you time and money later on.
Save Money
Push the limits of what’s possible and reap the rewards of a building that costs next-to-nothing to run.
Smooth Process
Turn a potential minefield into a simple, streamlined and enjoyable process.
Combat Climate Change
Contribute to the increasingly urgent movement to combat climate change.

Our services from concept to post-occupancy

Through our range of services and wealth of experience, we’ll give you the confidence to deliver low carbon sustainable projects, whether you pick a one-off service or a complete start to finish bespoke package.

From our base in Southampton, in the lovely Hampshire countryside, we work across the south of England, London and the home counties – we’re also helping clients deliver low carbon projects from further corners of the UK and beyond.

home owners and self-builders

For home owners and self-builders

We help our homeowners improve their existing buildings, tackle their refurbishments, AECB retrofit and EnerPHit projects. Well help you get the important details right, point out the biggest wins and help with finding the right contractors. We are always on hand for a quick phone call or site visit.

For architects

For architects

We help architects with compliance, building fabric optimisation, low energy, low water, zero carbon strategies, Passivhaus projects and dynamic thermal modelling. We work closely through each of the RIBA Plan of Works including post occupancy evaluation. We’re always available for design team meetings and client briefings.

Builders and Developers

For builders and developers

We help a number of regional and national developers with planning and design of low energy and sustainability new build developments and large commercial schemes including compliance, BREEAM assessments and onsite testing. We know site teams are under a lot of pressure to deliver and we pride ourselves on our flexibility and fast turn around.

For local authorities and housing associations

For local authorities and housing associations

We work with local authority and housing associations deliver affordable Passivhaus schemes and community projects and help deliver strategies for reducing both operational and embodied carbon. We know it’s not always easy to justify the cost of low energy schemes, but we’re here to breakdown the numbers and help deliver the business case, in fact we enjoy the challenge!

Have a look at our case studies to see the varied projects we are involved in.

But who are we?

I’m Andrew, and I am the Director here at Buildpass. I’m something of a geek when it comes to sustainability and energy performance. Ever since I started out, I’ve been hooked on the intricacies of energy performance and the vagaries of our government’s policies. I know it’s not everyone’s cup of tea, but it’s most certainly mine. And on this warming planet of ours, it’s becoming more and more important.

Andrew Sadler

Find out more about the story of Buildpass and what led me here.

Why choose us?


We know that when you need an answer, you need it quick. We endeavour to provide speedy responses and solutions to any problems you might face.


Our services won't break the bank - we're all about maximising the UK's energy efficiency, and our prices reflect that.


We aren't attached to any agencies or partner organisations, meaning you will always get 100% honest and impartial advice from our team.


We've got over a decade of experience behind us; you can trust in our knowledge, expertise and attention to detail.


We believe that genuine, personal relationships are the key to success. It's important that you know, like and trust us, and we'll do everything we can to make that a reality.


We are always just a phone call away - you can rely on Buildpass to guide you, support you and help you reach your goals.


Don’t just take our word for it, look at some of our reviews

I recently worked with Andrew from BuildPass on a new build project of mine and from the start to finish I found him/them to be super efficient, quick with replies and overall I am very happy with their service! Will 100% use them again!

Buildpass were extremely flexible and helpful in undertaking the air test at our property.
Very helpful with giving advice and help too.

Graham was very helpful in sorting out a difficult BC officer by providing SAP and U value calc for an extension. Always available on the phone, and has enough experience to help fight your corner. Highly recommend.

Latest news, views and tech reviews

East Hampshire Local Plan
Green Recovery


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AECB Building Knowledge
Passivhaus Trust
BREEAM New Construction


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