Licensed Residential Architect  Â·  Washington DC & Northern Virginia

Imagine a Home That
Helps You Flourish

Rigorous design. Genuine care. A home that works for your health and your life.

Schedule a Free Consultation View Case Studies
AIA NCARB WELL AP
Licensed Architect  ·  Washington DC  ·  Virginia  ·  Arkansas
The Practice

A More Considered
Approach to Design

Designing or renovating a home is one of the most significant investments you will make. This practice was founded to offer something different: personal attention, wellness expertise, and timeless design for clients who care about how their home actually feels to live in.


Every project is personally led from first conversation through construction. No handoffs, no junior staff, no AI. You work directly with a Princeton-trained architect who treats your home with the care it deserves.


About the Practice
"Kacper helped us create our dream home. The process was amazingly smooth. You know what it will cost, what each step entails, and what you will receive. He listened to our priorities, asked a lot of questions about our lifestyle, and developed a set of options that turned into our lovely home."
J.M.  ·  Renovation Client
Selected Work

Custom Homes, Renovations
& Additions

View Case Studies
DC Rowhouse
DC Rowhouse Renovation  ·  Washington DC
Full Home Renovation
Full Home Renovation Renovation  ·  Fayetteville, AR
Custom New Build
Custom New Build New Construction  ·  Fayetteville, AR
Why Kacper Lastowiecki Practice of Architecture

What Makes This
Practice Different

01
Personal Attention, Start to Finish

Every project is personally led from first conversation through construction. No handoffs, no junior staff, no AI. You work directly with me, always.

02
Wellness Expertise

As a WELL Accredited Professional, I design homes that actively support your health. Cleaner air, better natural light, and materials that genuinely feel good to live with every day.

03
Transparent Process

You will always know what to expect, what it will cost, and what comes next. Clear communication at every stage, from first call through construction completion.

Kacper Lastowiecki, AIA
About the Architect

Kacper Lastowiecki, AIA

I founded this practice to offer something different: a small, personal practice where every project is led by me from first conversation through construction. No handoffs, no junior staff.


I hold a Master of Architecture from Princeton University and am a WELL Accredited Professional, meaning every home I design is built around your health and wellbeing from the ground up.

M.Arch
Princeton
AIA
Member
WELL AP
Accredited
NCARB
Certificate
DC · VA · AR
Licensed

Learn More
Client Experiences

What Clients Say

Kacper helped us create our dream home. The process was amazingly smooth. You know what it will cost, what each step entails. He listened to our priorities, asked a lot of questions about our lifestyle, and developed options that turned into our lovely home.

J.M.  ·  Renovation Client

We've been living in one of Kacper's homes for a while now, and it's truly such a special space. The natural light, thoughtful layout, and beautiful finishes make it feel both modern and welcoming. You can tell how much care went into every detail.

Previous Client  ·  Custom Home

It's clear from day one that this place was created with real intention. The layout feels almost ergonomic. Every space is purposeful, the flow makes sense, and natural light moves through the rooms beautifully.

Previous Client  ·  New Build

A Statement on Artificial Intelligence

Human Work,
Done by Human Hands

Architecture has always been an expression of human creativity and craft. Every design decision at this practice comes from an active collaboration between architect and client. When you reach out, a human being reads and responds.

Your home will be designed by a trained architect who cares about the result.

Never Artificial Intelligence.

Free Consultation

Ready to Talk About
Your Project?

If you are considering a renovation, addition, or custom home in DC or Northern Virginia, I would love to learn about your project.


Schedule Your Free Consultation

Limited projects accepted per year

KLPOA
Kacper Lastowiecki
Practice of Architecture

Custom Homes  ·  Renovations  ·  Additions
Washington DC  ·  Northern Virginia
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About the Practice Design Process Selected Work FAQs Schedule a Consultation
Contact
KL@KLPOA.com (771) 777-4997
2300 Wilson Blvd Ste. 700
Arlington, VA 22201
© 2025 Kacper Lastowiecki Practice of Architecture AIA  ·  WELL AP  ·  NCARB  ·  Licensed DC  ·  VA  ·  AR
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Kacper Lastowiecki Practice of Architecture
Kacper Lastowiecki Practice of Architecture
Home
About the Practice
Process
Selected Work
Ideas
FAQs
Contact
Schedule a Consultation
Kacper Lastowiecki Practice of Architecture
Kacper Lastowiecki Practice of Architecture
Home
About the Practice
Process
Selected Work
Ideas
FAQs
Contact
Schedule a Consultation
Home
About the Practice
Process
Selected Work
Ideas
FAQs
Contact
Schedule a Consultation