Sonoma County's Premier Agent

Sonoma's finest
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With deep roots in Sonoma County and an intimate knowledge of its most coveted neighborhoods, Donald Van de Mark delivers an unmatched real estate experience — from estate sales to valley retreats.

View Listings (707) 337-2227

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Luxury estate in Sonoma County

Sotheby's

International Realty

Premier Agent

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Donald Van de Mark, Sonoma real estate agent

25+

Years Serving

Sonoma County

About Donald

A lifetime of Sonoma expertise

Donald Van de Mark isn't just a real estate agent — he's a Sonoma County native with an intimate understanding of this region's unique character. From the historic town center on Napa Street to the rolling vineyard estates of the valley's hidden pockets, Donald knows every street, every zoning nuance, and every opportunity.

As a Premier Agent with Sotheby's International Realty, Donald brings global marketing reach and white-glove service to every transaction. Whether you're buying your first home in Sonoma or selling a prized estate, his approach is personal, thorough, and results-driven.

Local Market Expertise
Sotheby's Global Reach
Negotiation Excellence
Personalized Service
Schedule a Consultation
Featured Listings

Exceptional Properties

Handpicked homes across Sonoma County — from vineyard estates to downtown lofts, each property reflects the character and quality this region is known for.

Vineyard estate in Sonoma Valley
Featured

Vineyard Estate

$3,450,000

Sonoma Valley • 4 Bed • 3.5 Bath • 4,200 sq ft

A breathtaking vineyard estate with panoramic valley views, private wine caves, and award-winning vineyards.

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Downtown Sonoma luxury home

Downtown Residence

$1,895,000

Downtown Sonoma • 3 Bed • 2.5 Bath • 2,800 sq ft

Walk to the Plaza from this beautifully restored Victorian with modern amenities and original character.

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Canyon view luxury home
New Listing

Canyon View Estate

$2,750,000

Sonoma Canyon • 5 Bed • 4 Bath • 5,100 sq ft

Perched above the canyon with sweeping views, this contemporary masterpiece blends luxury with serene natural beauty.

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What We Offer

Comprehensive Real Estate Services

Every transaction deserves a dedicated strategy. From listing to closing, Donald provides the full spectrum of services to protect your interests and maximize your return.

Buyer Representation

Expert guidance through every step of the home-buying process — from identifying the right property to negotiating terms and closing with confidence.

Seller Representation

Strategic pricing, professional marketing, and aggressive negotiation to sell your property at the highest possible price in the shortest time.

Market Analysis

In-depth comparative market analysis using real-time data to determine accurate property values and inform smart buying or selling decisions.

Global Marketing

Leveraging Sotheby's International Realty's worldwide network and premium marketing platforms to reach qualified buyers across the globe.

Contract Negotiation

Skilled negotiation on your behalf to secure the most favorable terms, whether you're making an offer or responding to one.

Neighborhood Expertise

Deep knowledge of Sonoma County's diverse communities — from historic Sonoma to Glen Ellen, Rohnert Park, and the Wine Country hills.

Client Stories

What Our Clients Say

"Donald's knowledge of Sonoma is unmatched. He helped us find a vineyard property we didn't even know existed — and negotiated a price that exceeded our expectations."

M.R.

Michael & Rachel T.

Sonoma Valley Buyers

"Selling our family home felt overwhelming until we met Donald. His professionalism, market insight, and genuine care made the entire process smooth and stress-free."

S.L.

Susan & Larry K.

Downtown Sonoma Sellers

"As first-time buyers in Sonoma, we had no idea where to start. Donald walked us through everything with patience and expertise. We found our dream home within weeks."

J.W.

Jennifer & David W.

First-Time Buyers

Sonoma County landscape at sunset
Get Started

Ready to find your Sonoma address?

Whether you're buying, selling, or simply exploring your options, Donald Van de Mark is ready to help you navigate Sonoma County's remarkable real estate market.

Schedule a Consultation Call (707) 337-2227
Get In Touch

Let's start a conversation

Reach out to discuss your real estate goals. Donald Van de Mark is available for consultations at his Sonoma office or by phone and email.

Phone

(707) 337-2227

Email

donald.vandemark@sothebyshomes.com

Office

25 E Napa St, Sonoma 95476-6758

Send a Message

Fill out the form below and Donald will respond within 24 hours.

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