Quick Takes With: Ruth Mandl

“Quick Takes” interviews are supposed to be fastlittle lightning bolts of personality, taste, and point of view.
But every so often, the “quick” part turns out to be a trap. You read a short Q&A and suddenly you’re thinking
about how your house breathes (or wheezes), why the prettiest room photo can still be a design fail, and whether your
next renovation should come with a recycling plan and a moral compass.

That’s what happens when the subject is Ruth Mandl, co-founder and principal of
CO Adaptive, a New York–based design-and-build practice known for retrofitting existing buildings with an
emphasis on Passive House performance, low-carbon materials, and creative reuse.
In her Quick Takes-style answersbooks, podcasts, a wardrobe staplethere’s a consistent message hiding in plain sight:
good design isn’t just what you see. It’s what you keep, what you fix, what you don’t throw away, and how you listen.

Who Is Ruth Mandl? A Fast, Context-Heavy Introduction

Mandl grew up in Vienna, where historic buildings aren’t museum piecesthey’re part of daily life. Her path into
architecture started early and stayed personal: family influence, a love of art and drawing, and the slow realization
that shaping space is both creative and consequential. She studied interior architecture in London before completing
a Master of Architecture at Columbia in New York, and later co-founded CO Adaptive with Bobby Johnston.

Today, her work sits at the intersection of climate reality and city reality: the U.S. has a vast stock of older
buildings, and we can’t “new-build” our way out of emissions. CO Adaptive’s approach is to upgrade what’s already here:
improve envelopes, electrify, cut energy demand, and treat existing materials like valuable inventory instead of
demolition debris. The result is architecture that’s less about trophy shots and more about long-term performance
comfort you can feel, energy you don’t waste, and materials that get a second (or third) life.

The Quick Takes That Reveal the Big Picture

1) Curiosity, Empathy, and the “Fresh Air” Effect

In a Quick Takes interview, when someone mentions the kind of media that inspires them, it can feel like a throwaway:
a podcast here, a playlist there. Mandl’s pick is revealing because it’s not “a vibe,” it’s a method. She’s pointed to
interviews that succeed because the host asks strong questions and listens closelyan idea that translates cleanly to
design work.

If you’ve ever sat through a renovation meeting where everyone talked at youtile! lighting! vibes!you can
appreciate the alternative. Listening well changes outcomes. It surfaces the real constraints (budget, schedule, code),
the hidden goals (quiet bedrooms, clean air, a kitchen that doesn’t overheat), and the non-negotiables clients may not
know how to articulate. Empathy isn’t a soft add-on; it’s practical data collectionjust with better manners.

2) “Design Isn’t a Photo Shoot” (And Thank Goodness)

Mandl has arguedbluntly, and refreshinglythat great design goes beyond aesthetics. That may sound obvious, until you
remember how often architecture is consumed as imagery: a single perfect angle, professionally lit, with the sort of
serene emptiness that suggests nobody owns a phone charger or has ever eaten a granola bar.

CO Adaptive’s work pushes against that “splashy photo = success” equation. Their focus on retrofit, energy, and
material cycles insists on a bigger scoreboard: operational energy, embodied carbon, durability, health, and
maintainability. In other words: your house can be gorgeous, but if it’s drafty, noisy, and powered by constant HVAC
panic, it’s not winning. It’s just photogenic.

3) “Simple, Functional, Adaptive” Isn’t MinimalismIt’s Strategy

When Mandl describes her design style in three wordssimple, functional, adaptiveit reads like a clean
label. But it’s also a philosophy for working with existing buildings, where perfection is rarely available and
flexibility is priceless.

“Simple” can mean fewer fussy assemblies, fewer fragile finishes, and clearer details. “Functional” is the refusal to
treat comfort, air quality, acoustics, and maintenance as background issues. And “adaptive” is the key word: old
buildings will always have surprises. An adaptive practice doesn’t fight that realityit designs with it, and often,
designs because of it.

CO Adaptive in Plain English: Retrofitting the Buildings We Already Have

The most climate-responsible building is often the one that already existsbecause much of a building’s carbon impact
is tied up in its materials and construction. CO Adaptive’s work treats retrofit and adaptive reuse as a design
frontier, not a compromise. Instead of “demo first, figure it out later,” the practice emphasizes careful
deconstruction, strategic upgrades, and reuse of what can be saved.

Their lens is both operational and material:

• Operational performance: airtight envelopes, robust insulation, high-performance windows, balanced
  ventilation, and systems that reduce heating/cooling demandoften aligned with Passive House principles.
• Material responsibility: saving original elements when possible, minimizing waste, choosing lower-carbon
  materials, and designing for future disassembly so today’s renovation doesn’t become tomorrow’s landfill.

The hidden twist is that this approach isn’t just about “being good.” It can be about being smarter. Keeping a
structure, reusing components, and reducing energy loads can protect budgets, shorten timelines in surprising ways,
and produce homes and workplaces that simply feel better to occupy. Comfort is persuasive.

Examples That Make the Philosophy Feel Real

Macon Street Passive House: A Brownstone Gets a Second (and Third) Life

One of the most instructive CO Adaptive stories is also the most personal: Mandl and Johnston used their own Brooklyn
brownstone as a testing ground for high-performance retrofit thinking. The project demonstrates the “both/and” that
makes retrofit hard and interesting: preserve historic character and dramatically improve energy performance.

In practice, that can mean temporarily removing and protecting original woodwork while rebuilding the thermal envelope;
upgrading windows for airtightness and comfort; electrifying to move away from on-site combustion; and pairing
efficient mechanical systems with constant, filtered fresh air through ventilation strategies. The result is not just
theoretical sustainabilityit’s lived experience: quieter rooms, steadier temperatures, and a different quality of
indoor air that many people don’t realize they’ve been missing until they feel it.

It also shows the social side of retrofit: neighbors and observers can misread a deep energy renovation as “ruining”
an old building, because so much of the work is invisible. That tension is part of the challenge: making the case that
preservation can include upgrading performance for the next hundred years, not just freezing a facade in time.

Timber Adaptive Reuse Theater: When a Metal Foundry Learns New Lines

Adaptive reuse gets especially compelling when a building’s past is industrial and its future is cultural. CO Adaptive’s
Timber Adaptive Reuse Theater (associated with The Mercury Store) transformed a former metal foundry into a space for
theater artistsan example of reuse that’s both ecological and civic. Instead of erasing the building, the project
leans into existing structure and history, making the old shell do new work.

This is where “low carbon” stops being an abstract virtue and becomes a series of design decisions: retaining heavy
timber where possible, using mass timber components for structural insertions when needed, and repurposing removed
elements as new architectural features rather than treating them as waste. It’s a project that reads as light-filled
and contemporary, but its real achievement is the material narrative underneath: keep what you can, add thoughtfully,
and avoid unnecessary virgin material.

Studios as Laboratories: Testing the Wall Before It’s a Wall

A quick detail from Mandl’s Quick Takes conversation hints at something bigger: the studio itself can operate like a
research space. When an office treats assemblies as prototypestesting how walls go together, how materials perform,
how details can be disassembled laterit shifts architecture away from “drawing output” and toward “making knowledge.”

That matters for retrofit because the hardest problems aren’t always glamorous. They’re junctions, air barriers,
moisture risks, insulation strategies, and buildability. When an office learns from builders and craftspeopleespecially
in a design-build modelthose details become shared language, not mysterious subcontractor magic.

The “Found Space” Move: Discovering Potential You Didn’t Know You Had

Retrofit projects frequently start with a surprise: a ceiling concealed by a dropped grid, a structural rhythm hidden
behind partitions, daylight blocked by past quick fixes. CO Adaptive has been recognized for projects that reveal and
rework existing conditions instead of bulldozing theman approach that often produces the most satisfying kind of
“newness”: the kind that was there all along, waiting to be uncovered and used well.

A Reading List That Sounds Like a Design Brief

Quick Takes questions about books can feel like a personality quiz, but Mandl’s list reads like a quiet manifesto.
Consider the themes: craft and the value of work, relationships with the natural world, and climate futures that avoid
doom-only storytelling. Those aren’t random interests. They map neatly onto a practice that cares about how buildings
are made, how people live inside them, and how design choices ripple outward.

It’s also a reminder that “sustainable design” isn’t a single checkbox. It’s a bundle of ethical and practical
decisions: whose labor is respected, which materials are prioritized, what gets wasted, and how we talk about the
future without giving up on it.

Style Isn’t Only What You Wear, But the Jumpsuit Helps

In the most disarming detail of all, Mandl’s repeated closet item is a set of Rachel Comey jumpsuitsfunctional,
well-made, simple, and often purchased secondhand. It’s a small, human-scale illustration of circular thinking:
extending the life of materials, choosing quality over churn, and keeping “good stuff” in circulation longer.

The parallel to building is almost too perfect. If a garment can be durable, repairable, and re-wearable, why should a
building component be destined for the dumpster after one renovation cycle? The joke writes itself: if you can buy a
jumpsuit used, you can probably save that door.

Quick Lessons for Homeowners, Students, and Anyone With a Drafty Window

Ask better questions before you pick better finishes

“What do you want this space to do?” is often more useful than “What do you want it to look like?” Comfort
goalsquiet, steady temperatures, better airhelp guide meaningful investments.

Retrofit is a climate strategy hiding in plain sight

You don’t have to build a brand-new “green” home to make an impact. Upgrading an existing building’s envelope and
systems can reduce energy demand dramatically, while keeping the embodied carbon of the structure in place.

Deconstruction beats demolition (when feasible)

Demolition is fast, but it’s also a one-way trip. Deconstructioncareful removal for reuse, donation, or repurposing
can preserve value, reduce waste, and even become a design opportunity.

Design for the future person who has to fix this

Durability, access, and maintainability are underrated design features. The best detail is often the one that makes
future repairs less painfuland keeps the building functioning longer.

FAQ: Quick Takes-Style Questions, Expanded

What does “Passive House” actually mean?

Passive House (or Passivhaus) is a high-performance building standard centered on an airtight envelope, robust
insulation, and high-quality windows, paired with efficient ventilation. The goal is to drastically reduce heating
and cooling demandoften by large marginsso comfort improves while energy use drops. It’s less “a gadget” and more
“a disciplined approach to the basics.”

Is adaptive reuse only for warehouses and factories?

Not at all. Adaptive reuse can apply to brownstones, small apartment buildings, old banks, storefrontsanything with
a structure worth keeping. The scale can be humble. The mindset is the same: respect what exists, upgrade what’s
underperforming, and reimagine what the building can become.

How can a regular remodel be more circular?

Start by inventorying what can be saved: doors, trim, fixtures, flooring, even framing elements. Consider donation or
reuse pathways for what can’t stay on-site. Then choose new materials with longevity and lower carbon in mind, and
detail assemblies so they can be taken apart later rather than destroyed.

Experiences Inspired by “Quick Takes With: Ruth Mandl” (An Extra )

The funny thing about a Quick Takes interview is how it follows you into real life. Someone reads a short answer
a comment about listening with empathy, or a dislike of design that stops at the surfaceand suddenly they can’t
unsee the places where buildings either help people or quietly fight them.

In one common scenario, a homeowner starts a renovation thinking it’s a “kitchen project,” only to discover it’s
actually a “comfort project.” The old house is charming, but the back room runs cold in winter and overheats in
summer. The family has been living with it like it’s a personality trait“Oh, that room is just dramatic.” Then they
sit with an architect who asks different questions: Where do you feel drafts? Which rooms are noisy? Do you wake up
congested? The conversation shifts from countertops to air sealing, from backsplash tile to ventilation, from “pretty”
to “pleasant.” When the work is done, the biggest change isn’t visible in photos. It’s the moment someone says,
“Wait… it’s quiet in here,” like they just discovered a secret level in their own home.

On job sites, “design beyond aesthetics” becomes a daily practice. Crews encounter the unknown behind a wall: odd
framing, patched utilities, layers of renovations stacked like geological history. A purely image-driven mindset
would treat these discoveries as annoyances on the way to the reveal. A retrofit-minded team treats them as
information. What can stay? What must go? If something comes out, can it become something else? A removed timber
isn’t just debris; it might become a bench, a stair detail, or a piece of millwork. Even when reuse isn’t possible,
the question itself changes behavior. People slow down. They plan. They think twice before defaulting to the dumpster.

In studios and classrooms, Mandl’s themes show up as a kind of permission slip. Young designers who feel pressured to
chase the most dramatic form or the most shareable image hear a different metric: durability, collaboration, and
climate responsibility matter. Instead of designing a “concept building” that assumes infinite resources, students
start with an existing structure and ask, “How do we make this better without pretending we got to start over?”
The design work gets harderand more real. It also gets more hopeful, because it’s rooted in the world as it is.

And then there are the small experiences that make the big ideas stick. Someone brings a plant to a dinner party as a
host gift, and the conversation turns toward what it means to care for living things. Someone chooses a secondhand
outfit, not as a statement but as a habit, and later wonders why buildings aren’t treated the same way. Someone
listens to an interview show and realizes that the best questions aren’t the flashiest; they’re the ones that make
people tell the truth. These are not grand, cinematic sustainability moments. They’re ordinary choices that add up:
listening carefully, valuing craft, keeping materials in circulation, and treating comfort as part of ethicsnot a
luxury upgrade.

That’s the lasting effect of a good Quick Takes profile. It’s not just “Here’s what a designer likes.” It’s “Here’s
how a designer thinks”and how that thinking can quietly improve the spaces the rest of us live, work, and breathe in.

Conclusion

Ruth Mandl’s Quick Takes answers are charming in the way good short interviews always are: a few specifics that feel
unexpectedly telling. But the deeper story is the consistency across scales. The same values show up everywhere:
curiosity and empathy as design tools, a refusal to treat a photograph as the finish line, and a commitment to
retrofitting what already exists rather than chasing novelty for its own sake.

If you take one idea from “Quick Takes With: Ruth Mandl,” let it be this: design is bigger than the visual. The most
meaningful work often lives in the parts you don’t postair, insulation, material choices, repairability, and the
willingness to ask smarter questions before making expensive decisions. The future of building may not be a shiny new
skyline. It may be the patient, clever reinvention of what’s already standing.

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