[Assessed 84.9%] Detached house in Kawaguchi, Saitama — 13 min from Nishi-Kawaguchi Sta.
Property Overview
| Location | Kawaguchi, Saitama |
| Nearest Station | JR Keihin-Tohoku Line Nishi-Kawaguchi Sta. |
| Walk | 13 min walk |
| Assessed Ratio | 84.9%Assessed 84.9% |
| Price | ¥57,800,000 |
| Type | Detached house |
| Structure | Wooden |
| Built | Built Aug 2026 (0 years old) |
| Land Area | 70.26㎡ |
| Building Area | 117.58㎡ |
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.
| SUUMO | ¥57,800,000View listing |
| athome | ¥57,800,000View listing |
| Kenbiya | ¥57,800,000View listing |
Assessed Value Breakdown
| Land assessed value | ¥23,185,800 |
| Building assessed value | ¥25,867,600 |
| Total assessed value | ¥49,053,400 |
| Asking price | ¥57,800,000 |
| Assessed ratio | 84.9% |
Calculation basis
- Land = road price ¥330,000/m² × land area 70.26m²
- Building = replacement cost ¥220,000/m² × floor area 117.58m² × remaining life 22y ÷ statutory life 22y
- Built Aug 2026 (0 years old)
Official Road Price Trend (last 3 years)
Cumulative change 2024 → 2026: +10.0%| Year | Road price (JPY/m²) | YoY |
|---|---|---|
| 2024 | 300,000 | — |
| 2025 | 320,000 | +6.7% |
| 2026 | 330,000 | +3.1% |
※ Based on inheritance-tax road prices published each July — a reference for the trend in land collateral value.
How We Checked This Property
Rather than republishing the listing as is, we counted the local streets of Namiki 1-chome on two sheets of the FY2026 route price map and cross-checked the figures in listings on four sites against the photos in the one listing with post-completion site photos, to confirm land area, completion date and level differences.
What We Could Not Confirm
- The 117.58 m² floor area includes a 13.66 m² built-in garage on the ground floor. Valuing the building without the garage gives an assessed ratio of about 79.67%, below 80%.
- The east (rear) boundary does not appear in the photos; any level difference or retaining wall there needs an on-site check or an enquiry to the agent.
- The listing does not explain whether the 'passages along the south and north neighbouring boundaries' are on the neighbouring land or a passage across this site (an access arrangement), and we could not confirm it.
- Land area (70.43 / 70.34 / 70.26 m²) and completion date (August–October 2026, or 'not started') differ between listings; exact figures need to be confirmed with the agent.
- No yield or expected rent is listed. Rent levels would need to be checked separately if the house is to be let.
※ 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
Neighborhood ② Dining Near the Station
About This Property
A newly built three-storey wooden detached house in Namiki 1-chome, Kawaguchi (a single-house development). The nearest station is Nishi-Kawaguchi on the JR Keihin-Tohoku Line, a 13-minute walk, and Kawaguchi Station is a 17-minute walk. The assessed ratio is about 84.87%. ⚠️ The 117.58 m² floor area includes a built-in garage of 13.66 m² on the ground floor (about 11.6% of the floor area); valuing the building without the garage gives about 79.67%, below 80%.
The land is freehold; listings give 70.43 m², 70.34 m² and 70.26 m², and we use the smallest, 70.26 m². The site faces a public road about 5.4 m wide on the west with a frontage of about 6.8 m, and no setback or private road burden is listed. Zoning is Quasi-Industrial (60% coverage, 200% floor area ratio), in a quasi-fire prevention district and a designated land development regulation area. The special notes mention 'passages along the south and north neighbouring boundaries'.
The house has 117.58 m² of floor area with 4LDK (an LDK of about 20.1 tatami on the first floor). Listings give completion dates from August to October 2026, and some describe it as not started or not completed, but photos in another listing show the building finished. In any case it is valued as a new build with zero years of age, so the assessment does not change. The price is ¥57.8 million in every listing we checked. As a new build, the building accounts for about 45% of the price in the assessment. The oldest listing for this property is dated 5 April 2026, so it has been on the market for about six months.
For the route price we used ¥330,000/m², the most common value on the local streets of Namiki 1-chome; the same route rose from ¥300,000 (2024) to ¥320,000 (2025) and ¥330,000/m² (2026), 10% over two years (leasehold ratio D). Even at the lowest local value in the district, ¥295,000/m², the ratio would be about 80.61%. Photos show the parking slab almost level with the road, and the block retaining edges on both side boundaries are about 0.8 m at most, under 1 m. The area is flat and low-lying, about 2.4 m above sea level. No yield is listed; whether for owner occupation or rental, the high share of building value in a new build should be taken into account.
Estimated Financing
Suggested Lenders
※ General tendencies of lenders covering this area, for information only. This does not guarantee or suggest any specific financing outcome.
Learn About Assessed Value and Financing
Our blog explains the basics you need to read the numbers on this page.
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積算評価（担保評価）とは、銀行が物件の担保価値を土地と建物から計算する方法です。計算式・再調達価格・法定耐用年数の目安、路線価を使った調べ方、融資が付きやすい物件の特徴を計算例つきで解説します。
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