Say Hello!

If you’re considering a project to improve, extend or remodel your home – or perhaps, you have a plot of land you’d like to build a new house on – now is the perfect time to start.

We would be delighted to discuss your project with you.

Say Hello!

We would be delighted to discuss your project with you.

    We would be delighted to discuss your project with you.

    In order to help inform an initial discussion with you, and to give us a better idea of your expectations and any more specific requirements, it would be very helpful if you could please fill in the below form.

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    Your Details

    About the Property

    About the Project

    What Type of Property are you Planning Works to?*

    FlatDetached houseSemi-detached houseTerraced houseMaisonettePiece of land / siteNon-residential building for conversion

    What Type of Works are you Hoping to Undertake?*

    New build propertyConversion from a non-residential buildingRear extensionSide extensionPorch extensionSingle storey extensionDouble storey extensionLoft conversion / extensionBasement conversion / extensionInternal reconfigurationKitchen refurbishment / remodelBathroom refurbishment / remodelSomething else

    How Long do you Envisage Staying in this Property?*

    What is your Budget Range for the Completed Works?*

    Do you have any Sustainability / Energy / Environmental Requirements or Goals?*

    Leti or AECB or Enerphit or Passivhaus goalsThermal improvements to your existing walls / floor / roofReplacement windows and doorsAir or ground source heat pumpNatural / organic insulationLow carbon construction methodsI'm keen to incorporate enhanced thermal performance, beyond the Building Regulations minimumNo, I only want to comply with the minimum Building Regulations requirementsI'm not sure, but am interested to learn moreSomething else

    Please confirm by checking the box below that you are happy for us to collect and store your data. All data is confidential and is for use by Keri Barr Architects only. It will not be shared without your permission.

    South facing window with light and shadow and seating. Keri Barr Architects in Harrow.

    Are you thinking about building to the Passivhaus standard in Harrow? 

    If you’re searching for architects who specialise in working to the Passivhaus standard, you’re in the right place. At Keri Barr Architects, we bring expertise and passion to creating ultra low energy homes that prioritise comfort, efficiency and sustainability.

    This might be an extension to your home, your new dream home or a small development.  We offer a range of service options and aim to eclipse your expectations.

    We’d love to have a chat to discuss your needs and how we might work together to realise your dream.

    At Keri Barr Architects, we know that your home should not only complement your lifestyle, but also reduce your environmental footprint.

    Our approach is rooted in creating considered, energy efficient and sustainable designs tailored to your unique needs. By focusing on passive design principles, we craft resilient, energy efficient homes that provide lasting comfort, lower energy bills and reduced environmental impact.

    As architects serving the Harrow community, we believe that designing smarter, more sustainable spaces is about more than just aesthetics – it’s about creating a positive legacy for both our clients and the planet.

    With our expertise in low carbon, low energy architecture, you can trust us to deliver innovative solutions that balance style, functionality and sustainability. Let’s work together to bring your vision to life and build a better future, one home at a time.

    Why Choose Passivhaus Design?

    Passivhaus (or Passive House) is the gold standard in energy efficient building design. By adhering to strict performance criteria, we create homes that are:

    Energy Efficient:

    Use up to 90% less energy for heating compared to traditional homes.

    Comfortable:

    Consistent indoor temperatures, excellent air quality and superior insulation for year-round comfort.

    Sustainable:

    Level up your Passivhaus design by significantly reducing your carbon footprint with low energy, eco-friendly construction.

    Cost Effective:

    Enjoy lower energy bills and long term savings without compromising on design or quality.

    Low energy Passivhaus design in Harrow.
    AECB Carbonlite retrofit design in Harrow.

    How We Deliver Your Passivhaus Home

    Initial Consultation:

    Personally discuss your vision, goals and budget with Keri, our in house Certified Passivhaus Designer at your property in Harrow.

    Bespoke Design:

    Create your personalised Passivhaus design working with a PHPP (Passivhaus Planning Package) model to optimise energy efficiency, comfort and aesthetics.

    Technical Expertise:

    Apply advanced techniques, such as airtight construction, high performance insulation, heat recovery ventilation systems and options for renewable energy generation.

    Planning and Compliance:

    Manage planning permissions and ensure that your design meets Passivhaus standards and the building regulations.

    Project Support:

    Guide you through the construction phase to ensure the finished build meets Passivhaus certification standards.

    Allow us to help you get your project started.

    Get in touch to start a conversation about your Harrow Passivhaus.

    If you’re ready to jump straight in to a specific and detailed conversation about your project:

    Are you ready to live in a home that is as energy efficient as it is beautiful?

    We know that starting a new project can feel overwhelming. That’s why, at Keri Barr Architects, we take a personal approach to guide you from start to finish.

    With clear communication, expert advice and designs tailored to your needs, we ensure that you vision is understood and that you feel supported every step of the way.

    Let’s start designing your Passivhaus home in Harrow.

    FAQs About Passivhaus Design

    What makes a Passivhaus different from other energy efficient homes?

    Passivhaus buildings achieve unmatched energy savings through a focus on airtightness, superinsulation, optimised ventilation systems and designed glazing.

    If you are interested in learning a bit more detail, you might like to read this journal post.

    Can you design a Passivhaus in a traditional style?

    Yes! Passivhaus principles can be applied to both contemporary and traditional architectural styles, ensuring that your home blends seamlessly with its surroundings or suits your aesthetic preferences.

    Is building a Passivhaus expensive?

    While initial costs can be higher, the long term savings on energy bills and the reduced environmental impact make it a worthwhile investment. The design has to be meticulous and the construction high quality – combined, creating a more resilient building. If you are keen on the Passivhaus methodology, but the cost becomes problematic, the AECB offer an excellent alternative standard. We are also AECB certifiers and would be pleased to discuss this alternative!

    I heard that my windows would have to stay closed, is that true?

    Nope, not true. In winter, your mechanical ventilation system would pre-warm the incoming air, so there is a benefit to keeping the windows closed. But, you are free to open your windows and leave your doors open whenever you wish!