A machiya buyer's due diligence list

In short

• The Building Standards Act requires 2 metres of frontage onto a 4-metre road before a site can be rebuilt.

• A site that fails that test is listed as 再建築不可, which describes the land rather than the house: you can repair the building, you cannot replace it.

• The requirement applies inside city planning areas, so it is national law rather than a Kyoto rule.

• Kyoto's ordinance defines a 京町家 by construction before 1950 plus traditional structure and form, not by how the house looks.

• Since April 2024 Kyoto City can certify a qualifying machiya for exemption from the frontage rule on major renovation.

• Every question on this list is answerable from public records before you make an offer.

The machiya listing you are reading carries three numbers: the year of construction, the floor area, and the width of the lane outside the door. The first two go into the contract.

The third decides whether the site can ever be rebuilt. It is not in the photographs, and few agents raise it at the viewing, but it sits in Kyoto City's public records where you can check it before you offer.

Road frontage and the right to rebuild

When you see 再建築不可 on a listing, it is describing the land, not the house. The Building Standards Act requires a building site to touch a road of at least 4 metres for a length of at least 2 metres, and a site that fails that test cannot receive a building permit, without which no work can begin. So you can repair the house standing there today and you can live in it, but you cannot take it down and put another one up, and the discount is real for that reason.

This is not a Kyoto rule. The Act is national law and the frontage requirement applies to any site inside a city planning area, which is why a detached house in suburban Osaka and a small apartment block in Tokyo face the same test. Machiya fail it more often because Kyoto's lanes were laid out before the Act existed.

Many machiya do not touch a public road at all, and reach one instead through a 私道, a privately owned strip held in shares by the neighbours, with the register showing who holds what. When you buy the house you buy that share, and with it the obligation to agree any work on that lane with the other owners before it starts.

That lane is both your way in and the route your water, gas and drainage take.

On an old machiya, replacing those lines is often the first large cost. Replacing them means digging, digging a 私道 means going back to the co-owners for consent, and those co-owners may be neighbours you have never met or people who moved away years ago and left an address on a register. So before you offer, the question is not only how wide the lane is. It is whose name it is in.

Not every unbuildable site ends there. Kyoto operates a 連担建築物設計制度 that assesses several adjacent buildings as one design unit, which can restore buildable capacity to a plot at the back of a lane. It needs the neighbours' agreement and the city's approval, and both can refuse. Whether it works on a particular plot is a question for Kyoto City, not one you can settle online.

What the machiya label means legally

Kyoto City has an ordinance on preserving and passing on 京町家, and it defines the term precisely, in a way that has nothing to do with how the house looks. The building must have existed when the Building Standards Act came into force, which for most of the city means 23 November 1950. It must also use traditional timber construction and show at least one traditional form, such as the narrow earth-floored passage running from the entrance through to the back of the plot (通り庭), or an entrance set on the eaves side rather than the gable end (平入り). This is a legal status, not a style.

A house built in 1970 in machiya style is not a 京町家 under the ordinance, while a plain wooden house from 1935 may well be, even after its façade has been altered, provided the structure and form qualify. The answer is in the register and the survey.

The distinction is worth money.

Since April 2024 Kyoto City has run a certification scheme for machiya that already existed at the reference date. A certified house can undergo major repair and alteration once fire and earthquake measures are in place, without having to meet the frontage requirement above. The application costs 27,000 yen and takes about 21 days. Its formal name is the 接道規定適用除外認定制度.

Note what it releases, because it covers repair and alteration and not replacement. On the same lane and the same plot, certification gives you one more route to take, and its absence makes the 4-metre rule the end of the line. The decision belongs to Kyoto City rather than to the seller or the agent, and nobody can promise it to you in advance.

Buyers who assume the exemption covers any old wooden house in Kyoto find out at the design stage. By then your offer is in and your deposit is paid.

Zoning and the rebuild envelope

Every site sits in a 用途地域, a use district that sets what may legally operate there, and residential-only districts restrict lodging most tightly. If you intend to run the house as a licensed short stay, check the district before you sign, because no licence overrides zoning. There is no route to fix it afterwards.

Zoning also caps how much you can build, and two ratios do that work. 建蔽率 sets the largest share of the plot that the building footprint may cover, and 容積率 sets the largest multiple of the plot area that the floor areas of all storeys may add up to. On a 56 square metre plot in a district capped at 60 per cent coverage, one floor can occupy at most 33.6 square metres, and the house in your renovation sketch probably will not fit.

Both ratios sit on the same city record as the use district, and you can pull it before you offer. What happens after the purchase is a separate trade. Licensing and daily operation sit with our sister firm The081, whose account of the licence route for a Kyoto machiya B&B covers that half. At the purchase stage your question is narrower, and it is whether the building may legally do what you intend.

The documents that answer each question

Frontage and rebuild rights come from the 建築基準法上の道路種別 and the site survey, and Kyoto City will supply both before you offer. Ownership of the lane comes from the 登記簿謄本 and the 公図, the first naming who holds what share and the second drawing the lane's shape and boundaries. Age and structure come from the 登記簿, and the machiya question from the city's own register.

Condition comes last, and it is the only item here you can see with your own eyes. Rot, foundations and wiring are real costs, and they differ from the four questions above in one way that matters. A surveyor can put a price on them, and no survey turns a site without a building permit back into one that has it.

None of these documents is hard to obtain, though they are all in Japanese and most are read against a map. Working from abroad, you can commission the set through a licensed broker, and the answers reach you before you commit to anything.

The machiya currently listed are on moogo's homes for sale.

Questions buyers ask

Can a 再建築不可 machiya still be renovated? Within limits, yes. Repair and interior work are possible, replacing the building is not. Kyoto's frontage exemption for certified machiya and the 連担建築物設計制度 can widen what is possible on some sites, and each carries its own conditions and its own approval.

Is a 再建築不可 property a bad purchase? It is a different purchase. The discount is real and so is the constraint, and the two only balance once you have fixed what you intend to do with the house. A buyer planning to hold and repair reads that trade very differently from one planning to rebuild.

Does a foreign buyer face extra restrictions on buying a machiya? No. Japan places no nationality restriction on owning land or buildings. Non-residents must report the acquisition to the Ministry of Finance within 20 days, and since April 2026 that duty covers purchases for your own use as well.

How long does the document check take? Days rather than weeks, once the address is known. The city records are public, and the delay in practice comes from arranging the site survey.

Does the seller have to disclose that a site is 再建築不可? Yes. It belongs in the 重要事項説明, the written explanation a licensed broker must give you before the contract. If you have not seen it in writing, you have not been told.

Every question on this list is answerable before you offer, from records that already exist. The order matters more than the effort. Frontage first, then the label, then the zoning, then the building itself. Reverse that order and you will pay for a survey before you discover that the site could never have carried your plan.

To have the set run on a specific address, tell moogo what to look for.

Written against published law and official sources as of 21 August 2026; rules change. 081株式会社 is a licensed real estate broker, not a tax or legal practice. This is general information, not advice on your situation, and case-specific decisions rest with the competent authority and your own professional.