積算100
[Assessed 103.3%] Detached house in Tokorozawa, Saitama — 15 min from Shimo-Yamaguchi Sta.
Assessed 103.3%Detached houseTokorozawa, SaitamaShimo-Yamaguchi Sta. 15 min walk

[Assessed 103.3%] Detached house in Tokorozawa, Saitama — 15 min from Shimo-Yamaguchi Sta.

Published: Sep 19, 2026Updated: Sep 19, 2026

Property Overview

LocationTokorozawa, Saitama
Nearest StationSeibu Sayama Line Shimo-Yamaguchi Sta.
Walk15 min walk
Assessed Ratio103.3%Assessed 103.3%
Price¥34,900,000
TypeDetached house
StructureWooden
BuiltBuilt Nov 2026 (0 years old)
Land Area187.82㎡
Building Area98.95㎡

Where This Property Is Listed

This property appears on the sites below. Listings matching on location, land area and building area are merged into a single article as the same property.

Kenbiya¥34,900,000View listing

Assessed Value Breakdown

Land assessed value¥14,274,320
Building assessed value¥21,769,000
Total assessed value¥36,043,320
Asking price¥34,900,000
Assessed ratio103.3%

Calculation basis

  • Land = road price ¥76,000/m² × land area 187.82m²
  • Building = replacement cost ¥220,000/m² × floor area 98.95m² × remaining life 22y ÷ statutory life 22y
  • Built Nov 2026 (0 years old)

Official Road Price Trend (last 3 years)

Cumulative change 2024 → 2026: ±0.0%
YearRoad price (JPY/m²)YoY
202476,000
202576,000±0.0%
202676,000±0.0%

Based on inheritance-tax road prices published each July — a reference for the trend in land collateral value.

How We Checked This Property

Beyond the listing itself, we checked six on-site photos and the lot plan from another listing of the same property, the 2026 route price map and valuation multiplier table, and GSI elevation data.

Locating the road price

On the 2026 route price map (sheet 34115) we traced the local streets around lot number 1904. Nearby streets range from 76D to 80D, and we took the local mode of 76,000 yen/m² as the representative value (unchanged since 2024). Oaza Yamaguchi mixes route-price areas and multiplier areas, but the valuation multiplier table confirms that its urbanization promotion area is a route-price area.

View source
Effective land area

The surveyed 187.82 m² is used as is. The private road share (co-ownership 31 m² × 1/3) is a separately registered designated road and is not included. The registered land category is "paddy field", but the lot is already a graded construction site with curbs and weed sheets, so no land preparation cost is deducted.

On-site check from photos

The listing's own photos show only nearby facilities, the station and floor plans, so we checked six on-site photos and the lot plan from another listing of the same property. The lot is roughly level with the public road on the east, and it has neither step access nor a flag-shaped layout. On the northern boundary there is an old block retaining wall with the neighbor's ground higher, with one course of new block on this side. We estimated the earth-retaining height three ways: (a) counting the old wall's courses (3.6 to 4 courses, 72 to 80 cm) plus about 20 cm of new block gives 0.9 to 1.0 m; (b) using the neighbor's outdoor AC unit (55 to 70 cm tall) as a scale gives 0.7 to 1.0 m; (c) using one course of new block (about 20 cm) as a scale gives about 0.45 m. The results split between 0.45 m and 1.0 m. The photos are only about 755 × 569 pixels, so the estimate cannot be narrowed further. We also sampled 81 points of GSI elevation data at 10 m intervals around the property, but they read an almost flat 79 to 80 m and cannot resolve a step of about 1 m at the boundary.

What We Could Not Confirm

  • From the photos and elevation data, the height (earth-retaining height) of the retaining wall on the northern boundary could only be narrowed to 0.45 to 1.0 m. An on-site check or an inquiry to the broker is needed.
  • The zoning differs between listings (Category 1 Residential Zone 60%/200% versus Category 1 Low-Rise Exclusive Residential Zone 50%/80%). The lot plan shows the zoning boundary near the east edge of the lot, so the zoning that applies to the lot needs to be confirmed. The registered land category is also "paddy field", so the status of the farmland conversion procedure needs to be checked.
  • The boundary with the waterway on the south and the west end of the lot could not be examined in detail in the photos (the level difference on the south appears to be under 0.5 m).
  • The house is still under construction (completion scheduled for November 2026), so the finished exterior works and boundary treatment cannot be confirmed yet. Yield and expected rent are listed as undecided.

Rather than reproducing the listing as-is, we verified the figures against public sources such as the official road price maps and the listing photos. This is not based on a site visit, so please confirm on site and with the seller before deciding.

Neighborhood ① Shopping Near the Station

Super Sekiguchi

Supermarket in Oaza Yamaguchi, Tokorozawa, about 220 m in a straight line from the property's map coordinates (location registered in OpenStreetMap).

Source
Gyomu Super

Supermarket in Oaza Yamaguchi, Tokorozawa, about 340 m in a straight line from the property's map coordinates (location registered in OpenStreetMap).

Source
Belc

Supermarket in Oaza Yamaguchi, Tokorozawa, about 690 m in a straight line from the property's map coordinates (location registered in OpenStreetMap).

Source

Neighborhood ② Dining Near the Station

McDonald's

Hamburger fast-food restaurant in Oaza Yamaguchi, Tokorozawa, about 490 m in a straight line from the property's map coordinates (location registered in OpenStreetMap).

Source
Bamiyan

Chinese family restaurant in Oaza Yamaguchi, Tokorozawa, about 540 m in a straight line from the property's map coordinates (location registered in OpenStreetMap).

Source

About This Property

⚠️ There is a retaining wall on the boundary with the northern neighbor (an old concrete-block wall, with the neighbor's ground higher). We estimated the earth-retaining height from the listing photos in three different ways, but the results ranged from 0.45 m to 1.0 m, so the height has not been confirmed. This site's exclusion criterion is an earth-retaining height of 1 m or more, and the upper end of the estimate reaches that line. Please confirm the height on site or by asking the broker before considering a purchase.

A newly built detached house in Oaza Yamaguchi, Tokorozawa, a 15-minute walk from Shimo-Yamaguchi Station on the Seibu Sayama Line (the listing also gives a 20-minute walk to Seibu-Kyujo-mae and Seibuen-Yuenchi stations). It is Building A of the three-lot "Tokorozawa Yamaguchi Phase 19" development; the other two lots are already sold. It is a two-story wooden 4LDK with 98.95 m² of floor area (54.24 m² on the first floor and 44.71 m² on the second) on a surveyed 187.82 m² freehold lot. Completion is scheduled for November 2026 with handover in December, and the house is planned to obtain Long-Life Quality Housing certification and design and construction performance evaluations.

The lot fronts a public road about 4.0 m wide on the east and a designated road about 4.2 m wide at its south-east corner, and includes a co-ownership share (31 m² × 1/3) in that designated road. The southern boundary is a waterway, and there is outdoor parking for two or more cars. Public water, public sewer and city gas are available. For the assessment we used a route price of 76,000 yen/m² for the local street in front (unchanged for three years since 2024), and the land is calculated on the 187.82 m² lot without the separately registered road share. Because the building is new, its assessed value is large and the assessed ratio is about 103%. Yield and expected rent are listed as undecided.

Two legal points need confirmation. The zoning differs between listings, Category 1 Residential Zone (60% building coverage / 200% floor area ratio) versus Category 1 Low-Rise Exclusive Residential Zone (50% / 80%), and the lot plan shows the zoning boundary running near the east edge of the lot. The registered land category is also "paddy field", so the status of the farmland conversion procedure needs to be checked. In short, the assessed value exceeds the price, while the height of the northern retaining wall, the zoning and the farmland conversion should be confirmed before signing. Tokorozawa Municipal Yamaguchi Elementary School (660 m) and Kami-Yamaguchi Junior High School (880 m) are nearby (distances from the listing). Distances to shops and restaurants are straight-line distances from the property's map coordinates, based on locations registered in OpenStreetMap.

Estimated Financing

Assessed value ¥36,043,320 → estimated loan ¥34,900,000 (100% of the asking price)

Actual loan availability, amounts and terms are subject to each bank's screening.

Suggested Lenders

関西みらい銀行
Regional bankAssessed-value focusedStrong with detached houses
土地から新築OK。 築古過ぎず、好立地で積算割合が高く、キャッシュフローが回る物件であれば、検討対象となる。 産休中はNG。 築古過ぎる場合は、信用金庫・信用組合のセゾンファンデックス保証付の不動産担保ローンが適す。
滋賀銀行
Regional bankAssessed-value focusedStrong with detached houses
土地から新築OK。 好立地で積算割合が高く、キャッシュフローが回る物件であれば、検討対象となる。 但し、産休中はNG。
信用金庫・信用組合のセゾンファンデックス保証付の不動産担保融資
Shinkin bankAssessed-value focusedStrong with detached houses
築古でも可。 築年数は問わず、土地の積算さえ出ていれば、20年程度の期間で融資してくれるケースが多い。 但し、立地が良くないと、担保評価が付かず取扱不可となる。 新築や築浅に関しても、建物の価値を適切に判断してくれる為、やりやすい。

General tendencies of lenders covering this area, for information only. This does not guarantee or suggest any specific financing outcome.

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