5.0★ · 70+ reviewsSustainable & biophilic200+ healthy homesBoulder & the Front Range
Sustainable & Biophilic Interior Design · Boulder, CO

Sustainable Interior Design in Boulder, CO

Alder & Ash designs beautiful, healthy homes across the Front Range — non-toxic materials, natural light, reclaimed character, and a deep connection to the living world.

a warm biophilic living room full of plants natural wood and daylight
About Alder & Ash

The Greenest Home and the Most Beautiful One Are the Same Home

For a long time, 'sustainable' design meant compromise — you could have a healthy, low-impact home or a gorgeous one, but not both, and the eco option always looked a little crunchy. Alder & Ash exists to prove that was never true. For ten years, sustainable and biophilic design is the only thing we've done, and everything we've learned points the same direction: the healthiest, lowest-impact choice and the most beautiful one are, over and over, the same choice. Reclaimed wood has a soul new lumber can't fake. Non-toxic, natural materials feel better underfoot and against the skin, and they let you actually breathe in your own home. Real plants, natural light, and colors drawn from the landscape make a space feel alive in a way no trend can. So we design homes that are stunning and healthy at once — specifying finishes that don't off-gas, sourcing reclaimed and vintage pieces with history, planning for air quality and daylight and a genuine connection to the outdoors, and weaving it all into interiors that are warm, elevated, and unmistakably beautiful. Our clients don't sacrifice a thing for their values; they get the calmest, healthiest, most gorgeous home they've ever lived in, and the planet comes out ahead too. That's the whole idea, and after two hundred homes across Boulder, we're more certain of it than ever.

  • Sustainable & biophilic is all we design
  • Non-toxic, natural materials you can breathe around
  • Reclaimed and vintage pieces with real soul
  • Healthy AND beautiful — never a compromise
200+Healthy Homes Designed
10Years Sustainable-Only
5.0★Across 70+ Reviews
BoulderPearl Street Studio
The Alder & Ash Way

Three Things We Believe About Home

For homes that are beautiful, healthy, and alive, the Front Range trusts Alder & Ash.

Healthy Is Beautiful

Natural, non-toxic materials don't just do less harm — they look, feel, and age better than the synthetic stuff.

Nature Belongs Inside

Plants, daylight, and organic materials calm the nervous system. A home should feel connected to the living world.

Old Beats New

Reclaimed and vintage pieces carry a soul and a story that new-from-a-box never will — and they're the greenest choice.

Why Clients Choose Us

Beautiful, Healthy, and Truly Low-Impact

What it means to have Alder & Ash design your home.

Genuinely Sustainable

Not greenwashing. We design low-impact from materials to sourcing to the way a home uses light and energy.

A Home You Can Breathe In

Low- and zero-VOC finishes and natural materials mean no off-gassing and measurably healthier indoor air.

Alive With Nature

Living plants, daylight, and organic textures make a home feel calm, restorative, and connected to the outdoors.

Soul From Salvage

Reclaimed wood and vintage pieces give your home history and character you simply can't buy new.

Warm, Not Crunchy

Sustainable design that's elevated and gorgeous — earthy and refined, never granola or compromised.

Designed Around You

Healthy, beautiful, and built for how you actually live — your values and your daily life, in the same home.

How We Work

From Bare Rooms to a Living Home

A thoughtful process that ends in a home that's healthy, beautiful, and alive.

01

Listen

We learn your home, your health goals, your values, and how you want a space to make you feel.

02

Design

We plan the space, the light, the plants, and a full palette of non-toxic, natural, and reclaimed materials.

03

Source & Build

We source healthy and salvaged materials, coordinate the trades, and bring the living design to life.

04

Come Alive

We style with plants and finishing touches and hand back a home that's beautiful, healthy, and yours.

a light-filled biophilic interior detail with plants natural wood and linen
Why It Matters

Your Home Is the Air You Breathe Most

We spend the vast majority of our lives indoors, and most of that time in our own homes — which means the materials in your house aren't a background detail, they're the air you breathe, the surfaces you touch, and the environment your nervous system marinates in every single day. Conventional interiors are full of things that quietly work against you: finishes and furniture that off-gas volatile compounds for years, synthetic materials that feel dead and age badly, spaces cut off from daylight and greenery. It adds up, slowly, in ways you feel even if you can't name them. Designing for health flips that. Non-toxic, natural materials mean genuinely cleaner indoor air and surfaces that feel alive rather than plastic. Daylight and living plants are proven to lower stress and lift mood. Reclaimed materials keep waste out of landfills and carbon out of the air while giving your rooms a warmth and story new goods can't match. None of it requires sacrificing beauty — in fact it deepens it, because natural, characterful materials are simply lovelier than their synthetic stand-ins. That's the quiet promise of a healthy home: it's better for the planet, yes, but first and most immediately, it's better for you, in the place you spend your life. That's worth designing for on purpose.

  • Cleaner indoor air from non-toxic materials
  • Daylight and plants that lower stress
  • Reclaimed materials that cut waste and carbon
  • Better for the planet — and first, for you

Let's design a home that's alive

Tell us about your space and the healthy, beautiful home you're dreaming of. Your first consultation is complimentary — and often where a house starts to feel like a living thing.

Good Questions

Sustainable Design Questions, Answered

Does sustainable design mean my home will look 'crunchy'?

Not even a little — that's the myth we exist to bust. Sustainable and biophilic design done well is warm, elevated, and genuinely gorgeous; the natural and reclaimed materials we work with are simply more beautiful than their synthetic stand-ins. Real wood, natural stone, linen, living plants, and vintage pieces with history give a home a depth and soul that mass-produced goods can't. You get a calm, refined, stunning interior that also happens to be healthy and low-impact. Nobody walks into a Alder & Ash home and thinks 'eco' — they think it's the most beautiful, restful place they've been.

What does 'non-toxic' or 'healthy home' design actually involve?

It means choosing every material with your indoor air and wellbeing in mind. We specify low- and zero-VOC paints and finishes that don't off-gas, natural and solid materials over synthetics that release chemicals, and furnishings free of the worst flame retardants and formaldehyde-based glues. We also design for daylight, ventilation, and greenery, because air quality and light are as much a part of a healthy home as the surfaces. The result is a space that not only looks beautiful but is measurably better to breathe in and live in, which matters a great deal given how much of our lives we spend indoors.

Is biophilic design just adding a lot of plants?

Plants are part of it, but it's much deeper than a few pots on a shelf. Biophilic design is about weaving a genuine connection to the natural world through the whole home — abundant natural light, organic materials and textures, colors drawn from the surrounding landscape, sightlines to the outdoors, natural forms and patterns, and yes, thoughtfully integrated living plants. Done right, it makes a space feel calm, restorative, and alive in a way people feel immediately even if they can't name why. There's real science behind its effect on stress and mood, and it's one of the most powerful tools we have for making a home feel good to be in.

Do you really use reclaimed and vintage materials?

Constantly, and it's some of our favorite work. Reclaimed wood, salvaged fixtures, antique and vintage furniture, and materials with a past give a home warmth, character, and a story you simply cannot buy new — and they're among the greenest choices available, keeping usable material out of landfills and avoiding the carbon of new production. We have the sourcing relationships to find beautiful salvaged pieces and the design skill to weave them into a clean, cohesive, modern interior, so your home feels collected and soulful rather than either brand-new or like a thrift store.

Is sustainable design more expensive?

It's usually comparable, and often a better long-term value. Some healthy or reclaimed materials cost a bit more up front, but many natural materials are competitively priced, reclaimed pieces can be very affordable, and durable natural materials outlast cheap synthetics that need replacing. More importantly, we design to your budget either way and are candid about costs from the first conversation. The health and quality-of-life benefits of a non-toxic, light-filled, nature-connected home are real and ongoing, and most clients find that designing this way costs about the same as a conventional project while delivering far more.

What areas do you serve?

We're based on Pearl Street in Boulder and work throughout Boulder and the Front Range — Newlands, Chautauqua, North Boulder, Table Mesa, and out to Louisville and beyond are regular territory for us. Boulder's love of the outdoors and healthy living makes it the perfect home for this work. For larger sustainable or biophilic projects a bit further afield in Colorado, we're glad to travel. If you care about a home that's beautiful, healthy, and connected to nature, wherever you are on the Front Range, we'd love to talk.

Book a Sustainable Design Consultation

Tell us about your home and the healthy, beautiful, nature-connected space you're dreaming of. We'll be in touch within one business day.

  • Visit us1738 Pearl Street, Boulder, CO 80302
  • Call us(303) 555-0164
  • Email ushello@alderandash.co

Book a Sustainable Design Consultation