Professional/Medical offices at Crystal House 12 Old Mamaroneck Rd 550–5 940 pi² d'espace disponible • Bureau/Médical • White Plains, NY 10605

Suite 1A – 12 Old Mamaroneck Road, White Plains, NY ±1,039 SF Professional Office / Medical Space Available For Lease – Immediate Occupancy This well-designed ±1,039 SF suite offers an excellent layout for professional office, medical, dental, therapy, or related service users. The floor plan features multiple private rooms, a welcoming foyer, kitchenette, laundry area, and private bath — providing both functionality and privacy. Suite Highlights: Total Size: Approximately 1,039 SF Layout: 3–4 private offices/exam/consultation rooms, spacious primary room (ideal for large office or procedure space), separate dining/living area, kitchen, laundry, full bath, and foyer/reception Condition: Move-in ready with flexible configuration Key Features: Private restroom Kitchenette / break area Multiple partitioned rooms for maximum workflow efficiency Good natural light throughout Professional building Location Advantages: Heart of White Plains with immediate access to I-287, Bronx River Parkway, Metro-North, restaurants, and services Ideal For: Medical/dental practice, professional services (legal, accounting, insurance), counseling/therapy offices, or other professional users seeking a turnkey solution in a prime Westchester County location. Asking Rate: Contact broker for current pricing and terms. Suite 1A presents a rare opportunity to occupy a functional, well-laid-out office suite in an outstanding central location. For additional details, floor plans, or to schedule a private showing, please contact Kenneth Lefkowitz at Klein Lefkowitz Commercial Team.

Suite 1C (Large Suite) – 17 Old Mamaroneck Road, White Plains, NY ±2,866 SF Professional / Medical Office Space Available For Lease – Immediate Occupancy This expansive ±2,866 SF suite is one of the largest and most flexible professional spaces available in central White Plains. The floor plan features an impressive number of private rooms, multiple hallways, and several bathrooms, making it ideal for a multi-provider medical, dental, therapy, or professional services group. Suite Highlights: Total Size: Approximately 2,866 SF (per detailed Cubicasa floor plan) Layout: 10+ private offices / exam / consultation rooms, multiple baths, generous hallways for smooth circulation, and versatile open areas perfect for reception, waiting room, or administrative functions Configuration: Highly adaptable layout that can easily accommodate a wide variety of professional uses Key Features: Multiple private restrooms Excellent room count for maximum tenant customization Strong potential for natural light throughout many rooms Professional building environment Location Advantages: Prime White Plains location with easy access to I-287, Bronx River Parkway, Saw Mill River Parkway, Metro-North Railroad, Westchester County Airport, and an abundance of local amenities Ideal For: Multi-provider medical/dental practice, group therapy/counseling center, law or accounting firm with multiple partners, executive suites, or other professional office users requiring substantial square footage and room flexibility. Asking Rate: Contact broker for current pricing and flexible lease terms. This large suite at 17 Old Mamaroneck Road presents a rare opportunity to secure significant, turnkey professional space in an outstanding Westchester County location. For floor plans, additional details, or to arrange a private tour, please contact Kenneth Lefkowitz of the Klein Lefkowitz Commercial Team.

Suite 1E – 12 Old Mamaroneck Road, White Plains, NY ±690 SF Professional Office / Medical Space Available For Lease – Immediate Occupancy This efficiently laid-out ±690 SF suite provides an excellent balance of private rooms and functional support space. Ideal for a solo practitioner, small professional team, or specialized service provider. Suite Highlights: Total Size: Approximately 690 SF (per floor plan) Layout: Multiple private rooms/offices, spacious main room (suitable for larger office or treatment space), additional rooms, hall, and private bath Key Features: Private restroom Good room separation for privacy and workflow Functional circulation areas Move-in ready condition Location Advantages: Centrally located in White Plains with quick access to major highways (I-287, Bronx River Parkway), public transportation, restaurants, and services Ideal For: Solo medical/dental practitioner, attorney, accountant, therapist, insurance or real estate professional, or small service-oriented business. Asking Rate: Contact broker for current pricing and terms. Suite 1E offers a practical, well-proportioned office space in a highly accessible White Plains professional building. For the detailed floor plan, more information, or to schedule a showing, please reach out to Kenneth Lefkowitz at the Klein Lefkowitz Commercial Team.

Suite 1F – 12 Old Mamaroneck Road, White Plains, NY ±550 SF Professional Office / Medical Space Available For Lease – Immediate Occupancy Compact yet highly functional ±50 SF suite perfect for a solo practitioner or small professional user seeking an efficient, move-in-ready space. Suite Highlights: Total Size: Approximately 550 SF (per floor plan) Layout: Several private rooms/offices, bath, hall, and supporting spaces Key Features: Private restroom Good separation of rooms for privacy Efficient circulation Professional building Move-in ready Location Advantages: Prime White Plains location with excellent access to I-287, Bronx River Parkway, Metro-North, and local amenities Ideal For: Solo practitioner (medical, dental, therapy, legal, accounting), insurance agent, consultant, or small professional service office. Asking Rate: Contact broker for current pricing and lease terms. Suite 1F delivers an affordable, well-organized office solution in a convenient central Westchester location. Contact Kenneth Lefkowitz of the Klein Lefkowitz Commercial Team for the floor plan, details, or to schedule a tour

Suite 1H – ±790 SF Professional Office / Medical Space Available For Lease – Immediate Occupancy This thoughtfully designed ±790 SF suite offers a welcoming layout with excellent flow for professional or medical users. Features a reception area, multiple private rooms, and convenient support spaces. Suite Highlights: Total Size: Approximately 790 SF (per floor plan) Layout: Reception area, sitting room / waiting area, multiple private offices/rooms, foyer, bath, and supporting spaces Key Features: Dedicated reception and waiting area Multiple private consultation/exam rooms Private restroom Functional foyer entry Move-in ready with good natural light potential Location Advantages: Strong White Plains location with easy access to major highways, public transportation, restaurants, and services Ideal For: Medical/dental practice, therapy/counseling office, professional services (legal, accounting, insurance), or similar tenant. Asking Rate: Contact broker for current pricing and flexible lease terms. Suite 1H provides a professional, patient-friendly environment in a desirable central Westchester building. For the detailed floor plan or to arrange a private showing, please contact Kenneth Lefkowitz at the Klein Lefkowitz Commercial Team.