Sustainable Holmes

Robyn Johnson

Whether you're planning a renovation or building new home in Greater Sydney, the Southern Highlands, or the Illawarra-Shoalhaven areas, this podcast is your guide to clarifying your sustainable home goals, to connecting with the right professionals, understanding what makes homes perform better, and using materials wisely. 

Episodes

  1. Designing Homes That Belong with Alex Urena

    FEB 9

    Designing Homes That Belong with Alex Urena

    What if your "difficult" south-facing block could become your home's greatest asset? Or your tight renovation budget could create a space that feels twice its size? In this conversation, award-winning building designer Alex Urena reveals how ancient Peruvian architectural wisdom meets modern Australian sustainability to create homes that truly belong. Alex shares his unique design philosophy—one that begins with a ritual of touching the earth, asking permission, and listening to what the land wants to say. This deep respect for place, combined with 25 years of design experience across two continents, has resulted in homes that feel as though they've been there forever and will remain for generations to come. You'll discover: How south-facing sites can outperform north-facing blocks when designed with strategic courtyards, light wells, and glazing that captures indirect light while maintaining privacy and connection to natureThe secret to making compact homes feel expansive — one architect mistook Alex's 250m² project for 640m². Learn how ceiling heights, focal points, and spatial flow create perception over pure sizeReal-world passive design performance — Edgar Street stayed comfortable on a 40-degree day without air conditioning, and remained bone dry during severe flooding that turned the backyard into a swampWhy designing for "belonging" is the ultimate sustainability strategy — creating homes so perfectly suited to their site, owners, and landscape that future generations won't want to tear them downHow to navigate energy ratings without compromising design — Alex and energy assessor Robyn collaborate to achieve 7-star performance while honoring the original vision.Alex's stunning new book showcasing 20 Australian projects (featuring photography by Tim Shaw and writing by author Jane Riley) launches late February 2026. Proudly printed in Australia by Bambra Press. Published by Alex Urena Design Studio Pty Ltd with book design in collaboration with Beans Marketing, it reveals the complete design journey—from initial sketches to finished homes. Perfect for: Homeowners planning renovations or new builds in Greater Sydney and Surrounds, design enthusiasts, anyone interested in passive solar design, energy efficiency, climate adaptation, and creating homes with soul. Connect with Alex: www.alexurena.net | Instagram: @alexurenadesignstudio If you’d like to work with me directly in pre-design for your project in Greater Sydney and Surrounds, or use energy rating information to help make project decisions, head to www.sustainableholmes.com.au or message me on www.instagram.com/sustainable_holmes/ I’d love to help bring your sustainable home vision to life!

    1h 21m
  2. Small Things Done Exceptionally Well with Lisa Johnson Design

    JAN 19

    Small Things Done Exceptionally Well with Lisa Johnson Design

    In this rich conversation, Lisa takes us on a journey through her evolution as a designer—from creating bespoke fashion with her mother, to building and designing five boutique hotels across regional NSW, to her current practice creating thoughtful residential and commercial spaces on the South Coast. What makes Lisa's approach unique is her understanding that design isn't just about aesthetics—it's about people. Her years as a couturier taught her that every millimetre matters. When you're creating a pattern with ten seams, each tiny detail compounds. If you haven't paid attention to the small things, by the time you fit the garment to the client's body, nothing works. This meticulous attention to detail now translates into every aspect of her design practice. Lisa designs spaces by first understanding how you actually live. Where do you kick off your shoes? When do you retreat to your cave to regenerate? How does your morning routine flow through your home? She listens deeply, asks curious questions, and can close her eyes and hear a room—its spatial qualities, its natural rhythms. This intimate understanding allows her to create spaces that fit your life like a perfectly tailored garment. Her design philosophy, "small things done exceptionally well," extends far beyond the tangible. It's about the exchange between people in the design process. It's about discovering perspectives you haven't considered. It's about collecting solutions to design problems through genuine conversations with builders, trades, and suppliers who share her values of care and quality. We explore Lisa's evolving understanding of designing on country—respecting the wind, the slope of the ground, the natural placement of trees, and touching the earth lightly. She's questioning the default solutions that create win-lose scenarios, like masses of concrete creating impermeable surfaces that reroute water and cause flooding downstream. Instead, she's seeking win-win solutions where our homes sustain us and the earth beneath our feet can breathe and thrive. Lisa's approach to selecting materials and suppliers is equally thorough. She researches not just quality and durability, but carbon footprint, waste disposal, circular design, and after-sales care. She asks about the working environments where products are made. Her role, as she sees it, is to do this work for her clients—to find the people and products that have ticked off all the small things, because those details multiply. If something's terrible, it multiplies into a bigger problem. Through her intimate dinner talk series, "Small Things Done Exceptionally Well," Lisa is building a community of renovators, builders, clients, and industry professionals who are all interested in paying attention to invisible details and making better choices together. Because change happens through collective groundswell, through finding your people and stretching together. This episode is for anyone renovating or building who wants to understand how thoughtful design can create spaces that truly support how you live, while respecting the environment and creating positive ripple effects through careful material selection and genuine human connection. Visit lisajohnsondesign.com.au, or follow @lisajohnsondesign_ If you’d like to work with me directly in pre-design for your project in Greater Sydney and Surrounds, or use energy rating information to help make project decisions, head to www.sustainableholmes.com.au or message me on www.instagram.com/sustainable_holmes/ I’d love to help bring your sustainable home vision to life!

    56 min
  3. Small Footprint, Big Impact: Building Climate-Resilient Homes with Ben Wollen

    12/15/2025

    Small Footprint, Big Impact: Building Climate-Resilient Homes with Ben Wollen

    Episode Summary What if the key to truly sustainable housing isn't building bigger, but building smarter? In this conversation, architect Ben Wollen reveals why small, well-designed homes with multiple generations in mind are the future of sustainable building—and why your most valuable design investment isn't solar panels, but thoughtful orientation and a tight building envelope. Ben brings a rare dual perspective to architecture, combining environmental science with architectural design. This unique background shapes his approach to creating homes that don't just minimise environmental impact, but actively withstand the intensifying effects of climate change. From his volunteer work with the Rural Fire Service to his research on bushfire resilience, Ben understands how buildings interact with the natural environment in ways few architects do. Throughout our discussion, Ben challenges common assumptions about sustainable design. He explains why north-facing glazing with thermal mass acts like a free solar battery—often more efficient than expensive tech additions you can retrofit later. He breaks down the critical elements of bushfire-resilient construction, from roof pitch and eave design to the importance of simple building forms that don't trap embers. And he shares how a small renovation project in Manly Vale demonstrated that transformative design doesn't require massive budgets or footprints. For homeowners in bushfire-prone areas, Ben offers invaluable insights into material selection and site-specific design strategies. He discusses why concrete isn't your only option for resilience, how to wrap your building envelope for both bushfire protection and thermal performance, and why understanding your site's microclimate across all seasons is essential. As co-founder of the Illawarra Festival of Architecture and Design (IFAD), Ben is passionate about bridging the gap between "arch-speak" and everyday homeowners. His message is clear: good design is sustainable design, and with the right approach, your home can be beautiful, functional, resilient, and future-proof without breaking the bank. If you're planning a renovation or new build in Greater Sydney, the Southern Highlands, or the Illawarra-Shoalhaven region, this episode offers a masterclass in thinking beyond minimum standards to create homes that truly perform. Connect with Ben Wollen: Website: www.wollenarchitecture.com.auInstagram: @wollen_architectureIllawarra Festival of Architecture and Design: https://ifad.net.au/ If you’d like to work with me directly in pre-design for your project in Greater Sydney and Surrounds, or use energy rating information to help make project decisions, head to www.sustainableholmes.com.au or message me on www.instagram.com/sustainable_holmes/ I’d love to help bring your sustainable home vision to life!

    1h 8m
  4. Beyond Fast-Food Housing: Building Better with Adam Souter

    11/24/2025

    Beyond Fast-Food Housing: Building Better with Adam Souter

    In this episode, Robyn sits down with Adam Souter from Souter Built, a builder who's raising the standard for sustainable construction. Adam's journey from working on luxury Sydney homes to building passive house-standard projects reveals what's possible when quality and sustainability become non-negotiable. Adam shares his frustration with Australia's "she'll be right" building culture and explains why fast-food housing—those grand five-bedroom homes with whisper-thin windows—won't stand the test of time. His approach is different: invest in what you can't easily change later. Thick insulation, proper weather-resistant wrapping, thermally-broken double-glazed windows, and ventilated cavities that keep structures dry are his minimum standards. We dive deep into the technical details that matter—how Adam builds ventilated roof and wall systems that prevent moisture problems and mold, why steel frames create hidden condensation risks, and how continuous insulation creates genuinely comfortable homes that cost less to run. Adam's passion for sustainable building stems from a personal place—his son's asthma led him to eliminate gas from his projects and embrace electrification. He practices what he preaches: chickens, composting, worm farms, and recycling heritage materials into new builds. His advice? Build smaller and better, not bigger and cheaper. Put your budget into the building envelope, not just the pretty finishes you can upgrade later. If you're planning a sustainable home in Greater Sydney and Surrounds, this episode will help you understand what questions to ask builders, why quality matters more than square meters, and how to find professionals who genuinely share your values. This conversation reveals that building sustainably isn't about compromise—it's about making smart choices that protect your investment and your family's wellbeing. Ready to connect with Adam and the Souter Built Team? Visit www.souterbuilt.com.au Instagram: souter.built If you’d like to work with me directly in pre-design for your project in Greater Sydney and Surrounds, or use energy rating information to help make project decisions, head to www.sustainableholmes.com.au or message me on www.instagram.com/sustainable_holmes/ I’d love to help bring your sustainable home vision to life!

    57 min
  5. The Hidden Energy Drain in Your Home: Why Your Next Renovation Needs a Data-Driven Plan

    11/03/2025

    The Hidden Energy Drain in Your Home: Why Your Next Renovation Needs a Data-Driven Plan

    Episode Summary Are you planning a renovation but worried about making expensive mistakes? In this eye-opening episode, Robyn sits down with Michael Tibbs, a Mechanical Engineer and Home Energy Advisor from NEST EMPOWERED who's at the forefront of Australia's newest tool for assessing existing homes. Discover why your gut instincts about energy efficiency might be costing you thousands. Michael reveals insights from his work rating homes across NSW, including: Why that expensive solar system might leave you freezing coldThe hidden appliance that's likely your biggest energy drain (hint: it's not heating)How homeowners waste money on double-glazed windows while ignoring the basicsWhy your winter heating bills matter more than summer cooling in Greater Sydney and Surrounds.What makes this episode essential for renovators: Michael introduces the groundbreaking NatHERS Existing Homes tool, a CSIRO-developed assessment that takes just one day and costs around $450. Unlike generic advice, this rigorous assessment provides a personalised roadmap showing exactly where to invest your renovation budget for maximum comfort and energy savings. Learn the "fabric first" approach that should guide every renovation decision, from draught-proofing to insulation, and understand why piecemeal upgrades create uncomfortable, unhealthy and inefficient homes despite good intentions. Perfect for: Homeowners planning renovations across Greater Sydney and SurroundsAnyone frustrated with high energy bills in an existing homePeople who want data-driven decisions instead of guessworkRenovators who want to avoid the common trap of spending big but staying uncomfortableKey Takeaway: With mandatory energy disclosure on the horizon for property sales, getting ahead now means you can renovate strategically, increase your home's value, slash your running costs, and actually enjoy living in your space. Ready to stop guessing and start optimising? This episode will change how you think about your next renovation project. Contact Information Michael Tibbs - Nest Empowered Home Energy Assessments | NatHERS Existing Homes | Renovation Planning Visit: nestempowered.com.au and https://www.instagram.com/nestempowered/ If you’d like to work with me directly in pre-design for your project in Greater Sydney and Surrounds, or use energy rating information to help make project decisions, head to www.sustainableholmes.com.au or message me on www.instagram.com/sustainable_holmes/ I’d love to help bring your sustainable home vision to life!

    53 min
  6. Sustainable Homes without the Overwhelm

    11/03/2025

    Sustainable Homes without the Overwhelm

    Penny Keogh, Eaves Content Agency and Illawarra Festival of Architecture and Design In this launch episode, host Robyn Johnson speaks with friend Penny Keogh about Penny's work in Co-Directing the Illawarra Festival of Architecture and Design (IFAD) into it's third year of hosting some of the most exceptional professionals in Illawarra region to discuss their projects, and to share their passions. Run annually in October, the 2025 theme is connecting our homes to the outdoors. Eaves Content Agency Illawarra Festival of Architecture and Design Robyn's Journey and Expertise Host Robyn Johnson, Director of Sustainable Holmes, launched this podcast after her personal struggle to design an energy-efficient home led her to become an accredited energy rater and sustainable building consultant. She brings a unique combination of skills to help homeowners navigate the complex world of sustainable construction: Environmental science and environmental planning backgroundAccredited energy rating expertisePre-design phase assessment including site constraints (water, bushfire, vegetation, planning controls)Comprehensive approach that considers energy goals before design begins. Podcast Mission and Themes The podcast targets everyday homeowners in Greater Sydney, Southern Highlands, and the Illawarra-Shoalhaven areas, connecting them with industry professionals committed to sustainable residential construction.  Four key themes guide the content: Clarifying sustainable home goals amid competing factors (durability, energy efficiency, embodied emissions, health)Connecting homeowners with like-minded professionalsEducating on better construction detailsGuiding material selection to avoid overwhelm and ensure early clarity in the building process.If you’d like to work with me directly in pre-design for your project in Greater Sydney and Surrounds, or use energy rating information to help make project decisions, head to www.sustainableholmes.com.au or message me on www.instagram.com/sustainable_holmes/ I’d love to help bring your sustainable home vision to life!

    25 min

About

Whether you're planning a renovation or building new home in Greater Sydney, the Southern Highlands, or the Illawarra-Shoalhaven areas, this podcast is your guide to clarifying your sustainable home goals, to connecting with the right professionals, understanding what makes homes perform better, and using materials wisely.