10 Checkpoints for Choosing Land Without Regret

Land is the foundation of a housing asset, and a repurchase is rarely an option. Even a plot that looks cheaper than the market can end up unbuildable or develop ground problems after you move in. To avoid such situations, it is important to turn pre-purchase checks into a standardized checklist. This article explains ten checkpoints commonly raised in professional practice.

Checkpoint 1: Road Access Requirement

Under Article 43 of the Building Standards Act, as a rule a building cannot be erected on land that does not front a road at least 4 m wide for at least 2 m. For land fronting only a road narrower than 4 m, a setback that retreats from the road may be required, reducing the effectively buildable area. Check the width of the fronting road on site and cross-check it with the city planning map.

Checkpoint 2: Ground Strength

Weak ground can cause differential settlement, leading to tilting and cracking of the building. Former ponds and marshes, or land created by filling, deserve particular caution. As a way to spot it, a neighborhood with many foundation-raising works is one hint. Commissioning a ground survey before purchase and asking the real estate company about the land's history are important.

Checkpoint 3: Sunlight and Shading Regulations

In areas subject to northern diagonal line restrictions and shadow regulations, building height and placement are limited, and the desired floor plan or building size may not be achievable. The impact is larger on narrow plots close to neighboring buildings, so for land with building conditions, consulting an architect in advance is reassuring.

Checkpoint 4: Use Districts and Livability

Use districts determine what kinds of buildings may be built and the building coverage and floor area ratios. Category 1 exclusively low-rise residential districts offer a quiet environment, but commercial facilities are hard to build, which can limit daily convenience. Conversely, commercial districts are convenient but can be lively and noisy. Always check the designation on the municipality's city planning map.

Checkpoint 5: Infrastructure Such as Water and Sewage

Whether water and sewage lines are in place greatly changes initial costs and effort. If the water supply is not in place, a septic tank or well may be needed. Also check the availability of electricity and gas connections and mobile phone reception.

Checkpoint 6: Disaster Risk

Check flood, sediment disaster and tsunami risks on hazard maps. Land designated as a sediment disaster warning area or within a flood inundation assumption area can be affected in insurance premiums, asset value and mortgage conditions. Be sure to check the overlapping hazard map and municipal materials before signing.

Checkpoint 7: Private Road Issues of the Fronting Road

If the fronting road is a private road, confirm its owner and the rights involved. Unless it is a designated road under the Building Standards Act, land reached across someone else's private road can face problems in building confirmation. Plots with private road burdens can also be disadvantaged in valuation when rebuilding or selling later.

Checkpoint 8: Boundary Confirmation

Land whose boundaries with neighbors are not confirmed can cause disputes when installing fences or building. Even where boundary markers exist, the site and the registered map often do not match. Check whether a confirmed survey has been completed and whether boundary confirmation documents exist; if not confirmed, discuss the sharing of survey costs in advance.

Checkpoint 9: Non-rebuildable Properties

Land that fails the road access requirement cannot be rebuilt once the existing building is demolished. If an existing house is offered far below market price, it may be a non-rebuildable property. If you plan renovation or rebuilding after purchase, always confirm buildability first.

Checkpoint 10: Final Pre-Purchase Checklist

Use the checklist below for the final confirmation before signing.

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Summary

The key to choosing land without regret is checking items systematically rather than relying on impressions. For price, use the prefecture pages and the tsubo converter tool on this site to grasp the market, and for conditions, work through the checklist in this article to reduce risk substantially. When in doubt, consider consulting professionals such as architects and licensed land and house investigators.