Koshigaya City Housing Market Report 2025
Data updated 2026-11-10 · Source: MLIT transaction price survey, 2005 Q3–2026 Q2
Key figures for 2025
- Median used condo price
- ¥26.0M
- ¥388k/m²
- Median house price (land + building)
- ¥33.0M
- +4.8% vs 2024
- Residential land per m² (sales)
- ¥140k/m²
- +7.7% over 5 years
- Transactions in 2025
- 757
- #13 of 61 areas in Saitama by price per m²
What the data says
Price growth is speeding up
Condo values per m² have risen about 6.6% a year over the past five years, faster than the 3.2% a year of the five years before. Buyers waiting for a dip have so far been paying more each year, and that has not yet changed.
Moving with Saitama
Per m², condos here are priced close to the Saitama average. That position has barely changed in ten years, so it moves with the wider market.
Being near a station is worth a lot
Condos within a 5-minute walk of a station sell for about 45% more per m² than those 11–15 minutes away. If budget is tight, a longer walk is the quickest way to cut the price.
A family market
78% of recent condo sales have three or more bedrooms. Demand comes mainly from owner-occupier families, which tends to make prices steadier but rental yields lower.
What a typical purchase costs
Half of all condo sales last year were between ¥16.0M and ¥38.0M. Listings outside that range are either unusual properties or worth a closer look.
A stable population
The population was roughly stable between 2020 and 2025 (−0.8% for the wider area). Moves in and out roughly balanced in 2025.
Typical vacancy
6.2% of homes were empty in 2023 (9.3% for the wider area), and 3.6% were empty without being for rent, for sale or used as second homes. The level of abandoned homes is around the national norm.
Buying vs renting
A median used condo costs about 34.9 years of the area's median rent (¥62k a month), compared with 33.5 years for the wider area. Prices are high relative to rents, so rental yields are thin and buyers are paying for expected growth. Rents here cover all rented homes, so treat this as a rough guide.
High earthquake risk
The government's seismic model gives a 65% chance of shaking of intensity 6-lower or stronger in the next 30 years (52% for the wider area). Check the building's earthquake standard (post-1981, ideally post-2000 for wooden houses) and consider earthquake insurance.
Official land prices are rising fast
On the government's fixed benchmark sites, which are valued the same way every year, residential land prices changed +3% in the year to January 2026 and +12% over five years. They are still 53% below their 1991 bubble-era level. Because these sites don't change, this is the cleanest measure of land value trends.
Some flood or landslide exposure
Of the official land-price benchmark sites here, which sit in typical neighbourhoods, 100% are inside the worst-case flood zone (10% with expected depths of 3 m or more). Most worst-case flood zones are shallow (under 0.5 m) at the edges, so depth matters as much as the share. Check the hazard map for any specific address before buying.
Living in Koshigaya City: people, homes and risks
- Population 2025
- 341,602
- -0.0% since 2020
- Saitama: -0.8%
- Net moves in 2025
- +585
- +1.71 per 1,000 residents
- Saitama: +3.08
- Vacant homes (2023)
- 6.2%
- 3.6% empty and not for rent or sale
- Saitama: 9.3%
- Median rent (2023)
- ¥62k
- per month, all rented homes
- Saitama: ¥62k
- Strong earthquake risk
- 65.2%
- chance of shaking of intensity 6-lower or more within 30 years
- Saitama: 52.1%
- Official land price 2026
- ¥136k/m²
- +3.4% in a year · +12.4% in 5 years
- Saitama: ¥122k/m²
- Flood exposure
- 100.0%
- of 39 benchmark sites in a worst-case flood zone (10.3% 3 m or deeper)
- Saitama: 45.4%
- Landslide exposure
- 0.0%
- of 39 benchmark sites in a landslide warning area
- Saitama: 0.2%
Check flood, landslide and tsunami zones for a specific address on the government hazard map ↗
Sources: 2025 Census (preliminary), 2025 Internal Migration Report, 2023 Housing and Land Survey (Statistics Bureau of Japan); J-SHIS seismic hazard model (NIED, 2024); Land Price Publication (MLIT). Earthquake probability is measured at the municipal center.
Example sales in Koshigaya City
Real transactions from the last four quarters, picked near the lower (20th percentile), middle and upper (80th percentile) price points. Locations are shown at district level, as published by MLIT.
Condo
¥15.0M
¥250k/m²
- Shichizacho
- Shin Koshigaya · 18 min walk
- 3LDK · 60 m²
- Built 1996 (30 yrs) · RC
¥26.0M
¥433k/m²
- Kawarazone
- Koshigaya · 8 min walk
- 3LDK · 60 m²
- Built 1999 (27 yrs) · SRC
¥41.0M
¥586k/m²
- Oaza Nishikata
- Shin Koshigaya · 11 min walk
- 3LDK · 70 m²
- Built 2020 (5 yrs) · RC
House
¥13.0M
¥163k/m²
- Osawa
- Kita Koshigaya · 7 min walk
- Land 100 m² · floor 80 m²
- Built 1987 (39 yrs) · Wood
¥34.0M
¥162k/m²
- Hanata
- Kita Koshigaya
- Land 260 m² · floor 210 m²
- Built 1986 (40 yrs) · Light steel
¥51.0M
¥486k/m²
- Miyamotocho
- Koshigaya · 10 min walk
- Land 140 m² · floor 105 m²
- Built 2026 (0 yrs)
Show data table
| Year | Condo | House |
|---|---|---|
| 2007 | ¥17.0M | ¥29.0M |
| 2008 | ¥15.0M | ¥29.0M |
| 2009 | ¥14.0M | ¥30.0M |
| 2010 | ¥18.0M | ¥29.0M |
| 2011 | ¥15.0M | ¥30.0M |
| 2012 | ¥15.0M | ¥29.0M |
| 2013 | ¥15.0M | ¥29.0M |
| 2014 | ¥14.0M | ¥30.0M |
| 2015 | ¥16.0M | ¥33.0M |
| 2016 | ¥17.0M | ¥32.0M |
| 2017 | ¥20.0M | ¥32.0M |
| 2018 | ¥20.0M | ¥32.0M |
| 2019 | ¥18.0M | ¥30.0M |
| 2020 | ¥21.5M | ¥30.0M |
| 2021 | ¥23.0M | ¥32.0M |
| 2022 | ¥23.0M | ¥35.0M |
| 2023 | ¥23.0M | ¥33.0M |
| 2024 | ¥25.0M | ¥34.0M |
| 2025 | ¥26.0M | ¥33.0M |
| 2026 (partial) | ¥25.0M | ¥35.0M |
Show data table
| Year | Condo | House | Land |
|---|---|---|---|
| 2007 | ¥246k/m² | ¥276k/m² | ¥130k/m² |
| 2008 | ¥231k/m² | ¥284k/m² | ¥120k/m² |
| 2009 | ¥213k/m² | ¥284k/m² | ¥110k/m² |
| 2010 | ¥242k/m² | ¥270k/m² | ¥110k/m² |
| 2011 | ¥231k/m² | ¥268k/m² | ¥99k/m² |
| 2012 | ¥218k/m² | ¥278k/m² | ¥86k/m² |
| 2013 | ¥220k/m² | ¥268k/m² | ¥100k/m² |
| 2014 | ¥231k/m² | ¥278k/m² | ¥100k/m² |
| 2015 | ¥243k/m² | ¥308k/m² | ¥110k/m² |
| 2016 | ¥257k/m² | ¥309k/m² | ¥120k/m² |
| 2017 | ¥300k/m² | ¥295k/m² | ¥110k/m² |
| 2018 | ¥292k/m² | ¥300k/m² | ¥110k/m² |
| 2019 | ¥253k/m² | ¥270k/m² | ¥120k/m² |
| 2020 | ¥300k/m² | ¥280k/m² | ¥130k/m² |
| 2021 | ¥329k/m² | ¥307k/m² | ¥110k/m² |
| 2022 | ¥338k/m² | ¥308k/m² | ¥150k/m² |
| 2023 | ¥355k/m² | ¥300k/m² | ¥130k/m² |
| 2024 | ¥375k/m² | ¥280k/m² | ¥130k/m² |
| 2025 | ¥388k/m² | ¥293k/m² | ¥140k/m² |
| 2026 (partial) | ¥372k/m² | ¥285k/m² | ¥110k/m² |
Show data table
| Building age (years) | Condo | House |
|---|---|---|
| 0 | – | ¥410k/m² |
| 1 | – | ¥379k/m² |
| 2 | – | ¥427k/m² |
| 4 | ¥554k/m² | ¥415k/m² |
| 5 | ¥585k/m² | ¥409k/m² |
| 6 | ¥586k/m² | ¥357k/m² |
| 7 | ¥615k/m² | ¥340k/m² |
| 8 | ¥600k/m² | ¥333k/m² |
| 9 | ¥629k/m² | ¥470k/m² |
| 10 | ¥700k/m² | ¥300k/m² |
| 11 | ¥671k/m² | ¥319k/m² |
| 12 | ¥671k/m² | ¥256k/m² |
| 13 | ¥439k/m² | ¥221k/m² |
| 14 | ¥462k/m² | ¥281k/m² |
| 15 | ¥419k/m² | ¥247k/m² |
| 16 | ¥477k/m² | ¥303k/m² |
| 17 | ¥467k/m² | ¥263k/m² |
| 18 | ¥439k/m² | ¥224k/m² |
| 19 | ¥377k/m² | ¥217k/m² |
| 20 | ¥430k/m² | ¥221k/m² |
| 21 | ¥345k/m² | ¥198k/m² |
| 22 | ¥366k/m² | ¥237k/m² |
| 23 | ¥350k/m² | ¥210k/m² |
| 24 | ¥388k/m² | ¥189k/m² |
| 25 | ¥343k/m² | ¥195k/m² |
| 26 | ¥367k/m² | ¥168k/m² |
| 27 | ¥338k/m² | ¥200k/m² |
| 28 | ¥296k/m² | ¥191k/m² |
| 29 | ¥338k/m² | ¥171k/m² |
| 30 | ¥220k/m² | ¥173k/m² |
| 31 | ¥240k/m² | ¥192k/m² |
| 32 | ¥243k/m² | ¥160k/m² |
| 33 | ¥254k/m² | ¥158k/m² |
| 34 | ¥252k/m² | ¥145k/m² |
| 35 | ¥277k/m² | ¥208k/m² |
| 36 | ¥215k/m² | ¥155k/m² |
| 37 | ¥284k/m² | ¥170k/m² |
| 38 | ¥247k/m² | ¥162k/m² |
| 39 | ¥257k/m² | ¥208k/m² |
| 40 | ¥271k/m² | ¥158k/m² |
| 41 | ¥229k/m² | ¥153k/m² |
| 42 | ¥228k/m² | ¥157k/m² |
| 43 | ¥223k/m² | ¥186k/m² |
| 44 | ¥192k/m² | ¥188k/m² |
| 45 | – | ¥184k/m² |
| 47 | – | ¥168k/m² |
| 48 | – | ¥121k/m² |
| 49 | – | ¥145k/m² |
| 50 | ¥275k/m² | ¥129k/m² |
Each line follows buildings from one construction period over time. 1981 is when Japan's current earthquake-resistance standard (shin-taishin) took effect.
Show data table
| Year | 1971-1980 | 1981-2000 | 2001-2010 | 2011-2020 |
|---|---|---|---|---|
| 2007 | – | ¥217k/m² | ¥386k/m² | – |
| 2008 | – | ¥220k/m² | ¥375k/m² | – |
| 2009 | – | ¥188k/m² | ¥350k/m² | – |
| 2010 | – | ¥217k/m² | ¥360k/m² | – |
| 2011 | – | ¥200k/m² | ¥354k/m² | – |
| 2012 | – | ¥200k/m² | ¥300k/m² | – |
| 2013 | ¥127k/m² | ¥215k/m² | ¥307k/m² | – |
| 2014 | ¥143k/m² | ¥200k/m² | ¥350k/m² | – |
| 2015 | ¥132k/m² | ¥229k/m² | ¥368k/m² | – |
| 2016 | – | ¥223k/m² | ¥360k/m² | – |
| 2017 | – | ¥257k/m² | ¥386k/m² | – |
| 2018 | ¥176k/m² | ¥275k/m² | ¥375k/m² | – |
| 2019 | – | ¥229k/m² | ¥329k/m² | – |
| 2020 | – | ¥250k/m² | ¥371k/m² | ¥510k/m² |
| 2021 | – | ¥280k/m² | ¥406k/m² | ¥538k/m² |
| 2022 | – | ¥282k/m² | ¥387k/m² | ¥600k/m² |
| 2023 | – | ¥327k/m² | ¥459k/m² | ¥636k/m² |
| 2024 | – | ¥272k/m² | ¥467k/m² | ¥662k/m² |
| 2025 | – | ¥300k/m² | ¥457k/m² | ¥643k/m² |
| 2026 (partial) | – | ¥342k/m² | – | – |
Each line follows buildings from one construction period over time. 1981 is when Japan's current earthquake-resistance standard (shin-taishin) took effect.
Show data table
| Year | 1971-1980 | 1981-2000 | 2001-2010 | 2011-2020 |
|---|---|---|---|---|
| 2007 | ¥181k/m² | ¥210k/m² | ¥340k/m² | – |
| 2008 | ¥160k/m² | ¥200k/m² | ¥346k/m² | – |
| 2009 | ¥180k/m² | ¥174k/m² | ¥333k/m² | – |
| 2010 | ¥153k/m² | ¥174k/m² | ¥326k/m² | ¥370k/m² |
| 2011 | ¥155k/m² | ¥179k/m² | ¥270k/m² | ¥337k/m² |
| 2012 | ¥160k/m² | ¥163k/m² | – | ¥320k/m² |
| 2013 | ¥125k/m² | ¥164k/m² | ¥240k/m² | ¥322k/m² |
| 2014 | ¥135k/m² | ¥155k/m² | ¥237k/m² | ¥343k/m² |
| 2015 | ¥108k/m² | ¥163k/m² | ¥242k/m² | ¥355k/m² |
| 2016 | ¥124k/m² | ¥160k/m² | ¥229k/m² | ¥360k/m² |
| 2017 | ¥128k/m² | ¥161k/m² | ¥241k/m² | ¥358k/m² |
| 2018 | ¥147k/m² | ¥164k/m² | ¥240k/m² | ¥350k/m² |
| 2019 | ¥127k/m² | ¥154k/m² | ¥230k/m² | ¥340k/m² |
| 2020 | ¥100k/m² | ¥163k/m² | – | ¥333k/m² |
| 2021 | ¥147k/m² | ¥153k/m² | ¥242k/m² | ¥341k/m² |
| 2022 | ¥149k/m² | ¥165k/m² | ¥256k/m² | ¥360k/m² |
| 2023 | ¥160k/m² | ¥170k/m² | ¥253k/m² | ¥333k/m² |
| 2024 | ¥141k/m² | ¥187k/m² | ¥238k/m² | ¥326k/m² |
| 2025 | ¥111k/m² | ¥182k/m² | ¥252k/m² | ¥355k/m² |
| 2026 (partial) | – | ¥160k/m² | – | – |
Prices near train stations in Koshigaya City
Sales from 2023–2025, grouped by nearest station.
| Station | Median used condo price | Condo price per m² | Median house price (land + building) | Walk (min) | Sales |
|---|---|---|---|---|---|
| Kita Koshigaya (北越谷) | ¥16.0M | ¥271k/m² | ¥36.0M | 15 | 270 |
| Koshigaya (越谷) | ¥28.5M | ¥416k/m² | ¥39.0M | 14 | 260 |
| Obukuro (大袋) | ¥17.0M | ¥243k/m² | ¥25.0M | 14 | 254 |
| Shin Koshigaya (新越谷) | ¥28.0M | ¥407k/m² | ¥44.5M | 11 | 196 |
| Sengendai (せんげん台) | ¥20.0M | ¥308k/m² | ¥30.0M | 14 | 157 |
| Gamo (蒲生) | ¥24.0M | ¥375k/m² | ¥35.0M | 11 | 152 |
| Koshigaya Laketown (越谷レイクタウン) | ¥44.0M | ¥643k/m² | ¥35.0M | 12 | 148 |
| Shinden(Saitama) (新田(埼玉)) | – | – | ¥30.5M | 15 | 40 |
| Takesato (武里) | – | – | ¥14.5M | 16 | 23 |
Used condo prices by layout in Koshigaya City
Sales from 2023–2025.
| Layout | Median used condo price | Typical size | Sales |
|---|---|---|---|
| 3LDK | ¥27.0M | 65 m² | 320 |
| 2LDK | ¥19.5M | 55 m² | 72 |
| 4LDK | ¥31.0M | 85 m² | 37 |
How much does an apartment cost in Koshigaya City?
The median used condo (mansion) in Koshigaya City sold for ¥26.0M in 2025, about ¥388k/m², based on 171 recorded sales.
How much does a house cost in Koshigaya City?
The median house sale, including the land, was ¥33.0M in 2025 across 394 sales.
Are property prices in Koshigaya City going up?
Over the five years to 2025, condo prices per m² changed +29.2% and residential land prices changed +7.7%.
About this data
Figures are medians of real transactions reported to Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) through its quarterly price survey. House prices per m² divide the total price (land and building) by the floor area. Medians based on fewer than 20 sales are not shown. The latest quarters are preliminary and are revised as more survey responses arrive.
Information only, not investment advice.