Does Twenty-Fifth Ave, San Mateo, CA have sidewalks?

As of early 2026, 95% of users say there are sidewalks

Is Twenty-Fifth Ave, San Mateo, CA walkable to restaurants?

As of early 2026, 88% of users say it's walkable to restaurants

Is Twenty-Fifth Ave, San Mateo, CA walkable to grocery stores?

As of early 2026, 83% of users say it's walkable to grocery stores

Is Twenty-Fifth Ave, San Mateo, CA dog-friendly?

As of early 2026, 81% of users say it's dog friendly

Would people walk alone at night in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 78% of users say people would walk alone at night

Is a car needed in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 77% of users say car is needed

Is parking easy in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 69% of users say parking is easy

Do kids play outside in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 67% of users say kids play outside

Are the streets well-lit in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 67% of users say streets are well-lit

Does Twenty-Fifth Ave, San Mateo, CA show holiday spirit?

As of early 2026, 58% of users say there's holiday spirit

Are yards well-kept in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 51% of users say yards are well-kept

Is Twenty-Fifth Ave, San Mateo, CA quiet?

As of early 2026, 51% of users say it's quiet

Do residents of Twenty-Fifth Ave, San Mateo, CA plan to stay at least 5 years?

As of early 2026, 49% of users say they plan to stay for at least 5 years

Are neighbors friendly in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 46% of users say neighbors are friendly

Are there community events in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 34% of users say there are community events

Is there wildlife in Twenty-Fifth Ave, San Mateo, CA?

As of early 2026, 32% of users say there's wildlife

What is 421 27th Ave estimated to be worth?

Trulia's estimated value for 421 27th Ave in San Mateo, CA is $1,910,900 .

Is San Mateo a buyer's or seller's market?

San Mateo is currently a seller's market, based on recent for-sale activity.

What's the median sale price in San Mateo?

The median sale price in San Mateo is $1.73M. That is down $75.33K from the prior month.

What do residents say about the Twenty-Fifth Ave neighborhood?

Residents describe the Twenty-Fifth Ave neighborhood in San Mateo, CA as pedestrian-friendly, walkable to restaurants, and walkable to grocery stores. See recently sold homes in Twenty-Fifth Ave, San Mateo .

Does 421 27th Ave have a pool?

Yes, 421 27th Ave in San Mateo, CA has a pool.

How big is the lot at 421 27th Ave?

The lot at 421 27th Ave in San Mateo, CA is about 0.16 acres (6,969 sq ft).

OFF MARKET

$1,910,900

Trulia Estimate

4 Beds
3 Baths
1,180 sqft

421 27th Ave, San Mateo, CA 94403

Twenty-Fifth Ave

Est. Refi. Payment $11,856/mo*

Refinance Your Home

Home Value

Trulia Estimate

$1.91M

Since last month

$18K (+1%)

Since last year

$388K (-16.9%)

Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +5% in the last 10 years

Month	Estimated value
2026
September 2026	$1.91M
August 2026	$1.91M
July 2026	$1.89M
June 2026	$1.93M
May 2026	$1.96M
April 2026	$1.93M
March 2026	$1.96M
February 2026	$1.88M
January 2026	$1.82M
2025
December 2025	$2.5M
November 2025	$2.43M
October 2025	$2.43M
September 2025	$2.29M
August 2025	$2.3M
July 2025	$2.38M
June 2025	$2.39M
May 2025	$2.46M
April 2025	$2.42M
March 2025	$2.41M
February 2025	$2.45M
January 2025	$2.35M
2024
December 2024	$2.38M
November 2024	$2.31M
October 2024	$2.35M
September 2024	$2.34M
August 2024	$2.33M
July 2024	$2.35M
June 2024	$2.45M
May 2024	$2.52M
April 2024	$2.49M
March 2024	$2.45M
February 2024	$2.38M
January 2024	$2.15M
2023
December 2023	$2.14M
November 2023	$2.19M
October 2023	$2.27M
September 2023	$2.35M
August 2023	$2.32M
July 2023	$2.33M
June 2023	$2.37M
May 2023	$2.35M
April 2023	$2.33M
March 2023	$2.29M
February 2023	$2.19M
January 2023	$2.14M
2022
December 2022	$2.18M
November 2022	$2.27M
October 2022	$2.3M
September 2022	$2.24M
August 2022	$2.3M
July 2022	$2.43M
June 2022	$2.6M
May 2022	$2.72M
April 2022	$2.82M
March 2022	$2.82M
February 2022	$2.34M
January 2022	$2.28M
2021
December 2021	$2.29M
November 2021	$2.28M
October 2021	$2.24M
September 2021	$2.21M
August 2021	$2.19M
July 2021	$2.32M
June 2021	$2.38M
May 2021	$2.46M
April 2021	$2.35M
March 2021	$2.14M
February 2021	$1.94M
January 2021	$1.92M
2020
December 2020	$1.91M
November 2020	$1.93M
October 2020	$1.86M
September 2020	$1.83M
August 2020	$1.83M
July 2020	$1.83M
June 2020	$1.8M
May 2020	$1.96M
April 2020	$2.03M
March 2020	$2.13M
February 2020	$2.04M
January 2020	$2.01M
2019
December 2019	$1.99M
November 2019	$1.92M
October 2019	$1.88M
September 2019	$1.85M
August 2019	$1.78M
July 2019	$1.79M
June 2019	$1.76M
May 2019	$1.8M
April 2019	$1.82M
March 2019	$1.84M
February 2019	$1.82M
January 2019	$1.86M
2018
December 2018	$1.88M
November 2018	$1.96M
October 2018	$1.95M
September 2018	$2.09M
August 2018	$2.14M
July 2018	$2.16M
June 2018	$2.17M
May 2018	$2.13M
April 2018	$2.11M
March 2018	$2.08M
February 2018	$2.04M
January 2018	$2.06M
2017
December 2017	$2.01M
November 2017	$1.98M
October 2017	$1.93M
September 2017	$1.91M
August 2017	$1.86M
July 2017	$1.96M
June 2017	$1.96M
May 2017	$1.86M
April 2017	$1.83M
March 2017	$1.85M
February 2017	$1.86M
January 2017	$1.86M
2016
December 2016	$1.91M
November 2016	$1.82M
October 2016	$1.83M
September 2016	$1.82M

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.

Address	Distance	Property Type	Sold Price	Sold Date	Bed	Bath	Sqft
2710 Isabelle Ave, San Mateo, CA	0.04	Single-Family Home	$2,438,000	02/23/26	3	2.5	1,721
426 27th Ave, San Mateo, CA	0.04	Single-Family Home	$2,525,000	10/09/25	4	2	1,949
343 27th Ave, San Mateo, CA	0.06	Single-Family Home	$2,010,000	05/28/26	4	2	1,740
430 27th Ave, San Mateo, CA	0.04	Single-Family Home	$2,375,000	11/24/25	3	2	1,745
410 29th Ave, San Mateo, CA	0.10	Single-Family Home	$2,450,000	04/24/26	3	2	1,320
225 28th Ave, San Mateo, CA	0.16	Single-Family Home	$2,228,888	12/19/25	3	3	1,965
2652 Isabelle Ave, San Mateo, CA	0.10	Single-Family Home	$2,200,000	06/11/26	2	1.5	1,330
309 26th Ave, San Mateo, CA	0.22	Single-Family Home	$2,330,000	10/17/25	3	2.5	1,890
503 30th Ave, San Mateo, CA	0.23	Single-Family Home	$2,400,000	06/22/26	3	2.5	1,840
313 W 25th Ave, San Mateo, CA	0.27	Single-Family Home	$2,500,000	07/24/26	3	3	1,626

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.

Address	Distance	Price	Bed	Bath	Sqft	Status
430 27th Ave, San Mateo, CA 94403	0.04	$2,375,000	3	2	1,745	Recently Sold
426 27th Ave, San Mateo, CA 94403	0.04	$2,622,000	4	2	1,949	Off Market
411 27th Ave, San Mateo, CA 94403	0.02	$3,750,800	5	3.5	2,927	Off Market
2710 Isabelle Ave, San Mateo, CA 94403	0.04	$2,438,000	3	2.5	1,721	Recently Sold
343 27th Ave, San Mateo, CA 94403	0.06	$2,010,000	4	2	1,740	Recently Sold
2652 Isabelle Ave, San Mateo, CA 94403	0.10	$2,200,000	2	1.5	1,330	Recently Sold
2671 Isabelle Ave, San Mateo, CA 94403	0.09	$2,335,000	3	2	1,810	Off Market
350 Portola Dr, San Mateo, CA 94403	0.11	$2,704,000	3	2	1,880	Off Market
2640 Isabelle Ave, San Mateo, CA 94403	0.13	$2,534,000	3	1.5	1,553	Off Market
2810 Isabelle Ave, San Mateo, CA 94403	0.08	$2,962,700	5	4.5	2,470	Off Market
514 Ventura Ave, San Mateo, CA 94403	0.12	$2,865,200	4	2	2,000	Off Market
530 Ventura Ave, San Mateo, CA 94403	0.14	$2,853,800	3	2.5	1,942	Off Market

Local Information

Map ViewExplore the area around 421 27th Ave.
Schools1 Elementary School1 Middle School1 High School
Shop & Eat

-- mins to

Commute Destination

Home Highlights

Single-Family Home

Built in 1939

1,180 sqft

$1,619/sqft

Garage

About this House

This single-family home is located at 421 27th Ave, San Mateo, CA. 421 27th Ave is in the Twenty-Fifth Ave neighborhood in San Mateo, CA and in ZIP code 94403. This property has 4 bedrooms, 3 bathrooms and approximately 1,180 sqft of floor space. This property has a lot size of 6969 sqft and was built in 1939.

421 27th Ave, San Mateo, CA 94403 is a 4 bedroom, 3 bathroom, 1,180 sqft single-family home in Twenty-Fifth Ave, built in 1939. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $1,910,900, with a rent estimate of $7,095/month.

Home Details for 421 27th Ave

Interior Features
Levels, Entrance, & Accessibility Stories: 1
Interior Details Number of Rooms: 8

Property Information
Year Built Year Built: 1939
Property Type / Style Property Type: Single Family Home

Exterior Features
Pool Pool
Parking & Garage GarageParking: Garage Attached

Community
Units in Building: 1

Lot Information
Lot Area: 6969 sqft

Price and Tax history

Year	Property tax	Tax assessment
2025	$5,236	$293,943

Home facts updated by county records

Additional Cost

Market trends in San Mateo

Last updated August 2026

Avg. sale price

$1.73M

$75.33KMoM

Sale-to-List Price

104.5%

2.2%MoM

Price per sq ft

$1.17K

$6MoM

Available listings

153

7MoM

Around this home

Beresford Elementary School
K-5
Public
218 Students
San Mateo-Foster City School District
4/10
GreatSchools Rating
Parent Rating Average
This is a small school where everyone really knows your kid. The community is welcoming and diverse, and it genuinely feels like parents, teachers, and students all have a voice. The teachers and staff truly care, and it shows. My kids have really enjoyed art, music, and LEGO classes, as well as great assemblies and field trips. Outdoor Ed is probably the student favorite. Because the student body is diverse, achievement levels vary, but teachers do teach students at their level through small reading and math groups. The recent outdoor renovation—new playground, turf, and an outdoor classroom—has been an awesome upgrade and is well loved by the students and neighborhood.
Parent Review
6mo ago
21 Reviews

View nearby schools on GreatSchools

The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

Neighborhood Overview

Twenty-Fifth Ave

3 Homes For You
Buy: $450k - $595k

See Local Highlights

Neighborhood stats provided by third party data sources.

What Locals Say about Twenty-Fifth Ave

At least 92 Trulia users voted on each feature.

95 % Say there are sidewalks
88 % Say it's walkable to restaurants
83 % Say it's walkable to grocery stores
81 % Say it's dog friendly
78 % Say people would walk alone at night
77 % Say car is needed
69 % Say parking is easy
67 % Say kids play outside
67 % Say streets are well-lit
58 % Say there's holiday spirit
51 % Say yards are well-kept
51 % Say it's quiet
49 % Say they plan to stay for at least 5 years
46 % Say neighbors are friendly
34 % Say there are community events
32 % Say there's wildlife

Sourced by Trulia users. Learn more about our methodology.

Trulia User
Resident
2y ago
"Heavy traffic can be a problem for dogs. Very friendly dogs as well as friendly pet owners. Local dog park is only 5/10 minutes away "
0
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Trulia User
Resident
3y ago
"Halloween on Portola Dr is huge, just about everyone decorated and hundreds of kids come from all around. "
0
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Carmenccw
Resident
6y ago
"Lots of dog owners in the area and plenty of people walking dogs at all hours. Most people are friendly enough to let your dogs play with theirs and chat with you."
1
Flag
Assumption C.
Resident
7y ago
"I really like this location nearby malls and restaurants also all the transportation are accessible and easy access with everything"
0
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Gpmelas
Resident
8y ago
"Very well located easy to go around, safe and with lots of green. Overall a nice neighborhood. We like it "
0
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Melaniejpavlovic
Resident
8y ago
"Family friendly and safe neighborhood. Long time residents and several schools with local shopping within walking distance"
0
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chuck c.
14y ago
"Close to almost everything and very safe neighborhood. Traffic on Palm Ave is heavy at times. Overall a great place to live!!"
0
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Frequently asked questions about 421 27th Ave

What is 421 27th Ave estimated to be worth?
Trulia's estimated value for 421 27th Ave in San Mateo, CA is $1,910,900.
Is San Mateo a buyer's or seller's market?
San Mateo is currently a seller's market, based on recent for-sale activity.
What's the median sale price in San Mateo?
The median sale price in San Mateo is $1.73M. That is down $75.33K from the prior month.
What do residents say about the Twenty-Fifth Ave neighborhood?
Residents describe the Twenty-Fifth Ave neighborhood in San Mateo, CA as pedestrian-friendly, walkable to restaurants, and walkable to grocery stores. See recently sold homes in Twenty-Fifth Ave, San Mateo.
Does 421 27th Ave have a pool?
Yes, 421 27th Ave in San Mateo, CA has a pool.
How big is the lot at 421 27th Ave?
The lot at 421 27th Ave in San Mateo, CA is about 0.16 acres (6,969 sq ft).