Welcome to 18300 Constitution Ave, located on a 1+ acre lot in prestigious Monte Sereno. Enter the grounds of your private estate where you will enjoy serene and tree-lined views as you drive up to your chateau. Imagine the possibilities on this spacious lot with existing floor plan or build brand new amongst other high-end homes. Enjoy easy access to major freeways and award-winning Los Gatos Schools. Per City, potential remodel or new home option: 5757 SF single story or 5307SF two-story main home. Lower flat pad is possible location for a pool, 800 sq ft studio/pool-house and 1200 sq ft 2-bedroom ADU. This prime location is nestled between Los Gatos and Saratoga. Sample fine dining at some of the Bay Areas finest restaurants or take a leisurely stroll through the vibrant downtown. Don't miss the opportunity to make this your dream home!