is a creative and spirited architecture and design studio under the leadership of Olvia Demetriou, FAIA and Peter Hapstak III, AIA, two accomplished design professionals whose careers have long been celebrated for their innovation and timelessness.

The studio benefits from a diversely talented and experienced group of architects and designers who produce striking and inventive design solutions.

Known for designing a full array of project types and sizes, HapstakDemetriou+ takes clients ideas from conception to full realization.

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Recent Press

Client List

&Pizza

14th & Corcoran

Abel Brown

American Tap Room

Arlington Tower

Avenue Suites-Georgetown

AYSE Meze Lounge

The Bentley

Bistrot Le Zinc

Black Hog

Blue Haven Resort

Bonner Group

Boss Shepherd’s

Bracket Room

Brain Freez

Brasserie Beck

Bread Furst

Buredo

Cafritz Residence

Casa Luca

CAVA Grill

CAVA Mezze

Chef Geoff

Choolah Indian BBQ

Davies & Kendall

DC Pizza

Dean & Deluca

Diwan Residence

Dupont Hotel

Fields Good Chicken

Fiola Mare

Freshii

Gypsy Soul

Hahn Loeser Parks

iRicchi Restaurant

Italian Market

Kalorama Residence

Kasper Residence

La Chaumiere

Levine & Associates

Little Beet

Little Folks School

Lost Society

Mason Dixie Biscuit Co.

Mercado de Paseo Caribe-Puerto Rico

Mission Apartments

Muze at the Mandarin Oriental

Mohegan Sun

Mussel Barn

Nando’s Peri-Peri

Niemczewski & Hoffman Residence

On Rye

One Eight Distillery

Open Road

O Street Market

Ouzo Bay

Oyamel

Park Chelsea

Pineapple and Pearls

Plan B Burger

Punjab Grill

Ritz Carlton

River Inn

Rose’s Luxury

Taco Bamba

Tadich Grill

Toregas Residence

Trio Restaurant

The Washington Ballet

Wildwood Kitchen

William & Carolyn’s

Zaytinya

2715 M Street NW
4th Floor
Washington, DC 20007

Telephone
202-333-9038

Fax
202-333-6888

Email
info@hd-ad.com

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Architecture and Design

Branding

Commercial

Cultural

Hospitality

Residential

Restaurant

Retail

Partners

Olvia C. Demetriou FAIA

Peter F. Hapstak III AIA

Team

Kassandra Bishop

Chris Buscetta

Jeff Carroll

Diego Castellanos

Christopher Corneal

Jamie Cortese

Indira Cruz

Casey Fair

Andamo Ford II

Hannah Furrey

María Andrea Girón

Michael Mannhard

Michael Mason

Joe Messier

Elisabeth Kim Oliver

Ayelet Oser

Jose Pagan-Rovira

Dawn Pettit

Azadeh Rabbani AIA

Erin Radetich

Gabriel Rivera Pagan

Cristian Rosa

Andrea Ross

Nathan Schuh

Alexandra Smith

Kendrea Snead

Jason Soifer assoc.AIA, APX, CSI, CDT

Edgardo Vela

La'Joya Worrell

Bill Young

Joanne Young RA, LEED AP