Washington DC • Northern Virginia • Maryland
Thoughtful Renovations & Additions for How You Live Today… and Tomorrow
Renovating an existing home is one of the most complex design decisions you’ll make.
It requires clarity, restraint, and a deep understanding of how design, construction, and long-term performance work together.
I help homeowners transform existing houses through carefully considered renovations, additions, and ADUs that improve daily life, elevate design quality, and enhance comfort, health, and longevity — without losing what makes the home special.
Planning a major renovation or addition (often starting at $350k)
Want to significantly improve layout, light, comfort, and flow
Value long-term quality over short-term trends
Appreciate thoughtful, restrained design rather than surface-level upgrades
Want an architect who is deeply involved, detail-oriented, and strategic
Is this Introductory Planning Call Right For You?
This 15–30 minute call is simply a way to:
Talk through what you’re planning
Share early thoughts on feasibility and approach
See if our priorities and expectations align
This is not a sales call.
No preparation is required, and there’s no obligation to move forward.
Renovation projects demand a fundamentally different approach than new builds. They require:
Strategic decisions about what to keep, what to remove, and what to re-imagine
Deep coordination with existing structure, systems, and code constraints
Clear communication to avoid costly surprises during construction
A design vision that respects the home’s character while meaningfully improving how it functions
My role is to bring clarity and confidence to that process by translating complexity into a coherent, buildable plan.
Renovation is Not New Construction
A Truly Personal Architect-Client Collaboration
You work directly with me, Kacper Lastowiecki, the architect designing your renovation from first conversation through construction.
No hand-offs.
No junior teams.
Just clear communication, shared decision-making, and focused attention.
This level of involvement leads to better outcomes and a better experience.
As a WELL Accredited Professional, design decisions are informed by evidence-based principles related to:
Indoor air quality & ventilation
Healthy, low-toxicity material strategies
Daylighting & circadian considerations
Thermal comfort & acoustics
Building envelope performance
These strategies are embedded into the architecture; never treated as optional upgrades.
Wellness-Centered Design, Integrated From Day One
A Thoughtful, Architect-Led Process
Introductory Planning Call
Alignment on goals, site, budget, and overall fit.
Concept Design
Massing, spatial relationships, light, and lifestyle patterns.
Design Development
Structure, systems, materials, and performance strategies.
Construction Documentation
Detailed drawings for permitting and accurate pricing.
Construction Administration
Ongoing involvement to ensure quality and protect intent.
What Clients Value
“Kacper helped us create our dream home. The process was amazingly smooth working with him. You know what it will cost, what each step entails, and what you will receive. He’s really well versed in sustainable and healthy options as well as efficiency concerns. Perhaps more importantly, he’s creative!”
— J.M.“…it’s clear from day one that this place was created with real intention. The layout actually feels almost ergonomic—every space is purposeful, the flow makes sense, and natural light moves through the rooms beautifully.”
— P.S.“The natural light, thoughtful layout, and beautiful finishes make it feel both modern and welcoming. You can tell how much care and craftsmanship went into every detail. It’s such a comfortable, happy place to come home to — we’re really grateful for the quality and design that Kacper put into it.”
— O.S.