310 Old Spanish Trail, Portola Valley, California 94028, Portola Valley, - bed, bath
ACTIVE$3,888,888
310 Old Spanish Trail, Portola Valley, California 94028
3Beds
3Baths
3,200Sqft
46,475Lot
Year Built
2006
Close
-
List price
$3.89M
Original List price
$3.99M
Price/Sqft
-
HOA
-
Days on market
-
Sold On
-
MLS number
ML81992906
Home ConditionGood
Features
Good View: Canyon, Hills, Vineyard
Deck
ViewCanyon, Hills, Vineyard
About this home
This Custom House was built in 2005/06 and was originally designed as a 5br/4.5ba/FR/DR/LR/ and with the option to have an attached (with separate entrance) in-law unit (ADU) and an oversized 3 Car Garage of approximately 4,500sqft. on over one acre. Seller has also furnished another preliminary plan sited for a separate ADU at the lower portion of the lot that would need an additional approval from the appropriate authorities. Seller at "buyers option" will complete any of the unfinished areas '"upon mutual agreement" as to the finishes best suited for them. Pictures of the the unfinished Rooms have been "Virtually Staged"
Price History
Date
Event
Price
10/15/25
Price Change
$3,888,888-2.5%
07/24/25
Listing
$3,990,000
Neighborhood Comparison
| Subject | Average Home | Neighbourhood Ranking (19 Listings) | |
|---|---|---|---|
| Beds | 3 | 4 | 45% |
| Baths | 3 | 3 | 50% |
| Square foot | 3,200 | 3,027 | 65% |
| Lot Size | 46,475 | 44,808 | 55% |
| Price | $3.89M | $4.51M | 25% |
| Price per square foot | $1,215 | $1,608.5 | 15% |
| Built year | 2006 | 9835984 | 90% |
| HOA | |||
| Days on market | 105 | 138 | 45% |
Condition Rating
Good
Built in 2006, this property is 18 years old and falls squarely within the 'Good' category's age range. The images reveal a very well-maintained home with high-quality finishes throughout, including extensive hardwood flooring, granite countertops in the kitchen and bathrooms, and high-end stainless steel appliances (e.g., Wolf range). The kitchen features light wood cabinetry and a mosaic tile backsplash, which, while not ultra-modern, are classic, clean, and in excellent condition. Bathrooms are similarly well-appointed with granite vanities, tiled floors, glass-enclosed showers, and a luxurious jetted tub with a unique fireplace feature. All major components appear functional and show minimal wear and tear, indicating a move-in ready property that does not require immediate renovations. The description mentions 'unfinished areas' but the provided images showcase finished spaces that are in excellent shape.
Pros & Cons
Pros
Prime Location & Desirable Views: Situated in Portola Valley, a highly sought-after area, the property offers desirable Canyon, Hills, and Vineyard views, enhancing its appeal and value.
Significant Expansion & Customization Potential: Originally designed for a larger layout (5 beds/4.5 baths/4500 sqft) with an attached ADU option, the seller offers to complete unfinished areas, allowing for buyer-specific finishes and expansion.
Generous & Private Lot Size: The property boasts over one acre (46,475 sqft), providing ample space, privacy, and potential for extensive outdoor living or landscaping.
Potential for Multiple Accessory Dwelling Units (ADUs): Includes an option for an attached in-law unit and preliminary plans for a separate second ADU, offering significant flexibility for multi-generational living or rental income.
Modern Custom Construction: Built in 2005/06 as a custom house, the property benefits from relatively modern construction standards and unique design elements.
Cons
Unfinished State Requires Buyer Investment: A significant portion of the property remains unfinished, necessitating additional financial investment, time, and decision-making from the buyer to complete, despite the seller's offer to finish.
Current Configuration Below Designed Potential: The property is currently configured as 3 beds/3 baths/3200 sqft, substantially less than its designed potential of 5 beds/4.5 baths/4500 sqft, indicating a major project to realize its full value.
Regulatory Hurdles for Additional ADU: While offering potential, the preliminary plans for a separate ADU require 'additional approval from the appropriate authorities,' introducing uncertainty, potential delays, and costs for the buyer.