Akiya Renovation Costs in Japan: What Repairs Really Cost and How to Budget

The house is cheap. The renovation is where the money goes, and where most overseas buyers' budgets fall apart, because the costs are unfamiliar and the condition of a house that has stood empty for ten years is hard to judge from photographs. This guide gives the prices as contractors actually quote them, in yen, organised by what to fix first, with the three budget levels we see most often and the grants that pay for part of the work.

The figures are typical ranges for 2026 from quotes on our clients' projects and published contractor pricing. Rural labour is cheaper than Tokyo; remote sites add travel; prices rise every year. Treat them as a planning guide, and get two or three written quotes before you commit. The buying side of the budget is covered in our guide to taxes and fees.

Start with the inspection, not the mood board

A building inspection (ホームインスペクション) by a licensed architect or inspector costs ¥50,000 to ¥100,000 and takes half a day. It tells you what the listing cannot: whether the roof leaks, whether the floor joists have rot or termites, whether the house has moved, what the wiring and plumbing are made of and how old they are. It is the one line in the budget you should never cut, and it has to happen before you sign the contract, not after. We arrange one for every house a client is serious about.

Two more checks apply to older houses:

• Earthquake standard. Houses approved before June 1981 were built to the old seismic code. A seismic assessment costs ¥100,000 to ¥200,000 and is subsidised by most municipalities; reinforcement, if needed, is priced below.
• Asbestos. A pre-screening survey is legally required before any demolition or major renovation of a building completed before 2006, at ¥50,000 to ¥150,000. Asbestos in old Japanese houses is usually in roofing slate and some wall boards; removal adds cost but is routine.

What the work costs, item by item

Add 10 percent consumption tax to quotes that exclude it, and keep a contingency of 15 to 20 percent. Old houses hide things behind walls.

The three budget levels

Liveable: ¥2 to ¥5 million. The house is structurally sound and dry. Clear it out, treat for termites, service or replace the water heater, replace the toilet, repair the kitchen and bath rather than replace them, new wallpaper and some flooring, and reconnect utilities. This is a holiday home or a first base for a buyer who will improve it over years. Most of the houses under ¥5 million on our map need at least this.

Comfortable: ¥8 to ¥15 million. Everything above plus a new kitchen and unit bath, new flooring throughout, partial insulation and double glazing in the rooms you live in, rewiring, and the roof and exterior walls brought up to a 15-year horizon. This is a full-time home at a standard a Japanese family would expect, and the level at which the house becomes rentable at a good rent.

Rebuilt interior: ¥15 to ¥25 million and beyond. Stripped to the frame: new layout, full insulation, seismic reinforcement, all services, new roof and cladding. Appropriate for a kominka or a house in a location that justifies it. At this level, compare the figure against demolishing and building new (¥20 to ¥30 million for a modest house), and remember that a non-rebuildable lot removes that option.

A rule of thumb that holds up: the renovation of a cheap akiya costs one to three times the price of the house, and the floor of a sensible all-in budget is about ¥6 million, whatever the house cost.

What to fix first

The order is the same for every old house, and it is not the order most people want to spend in.

1. Water out. Roof, gutters, flashing, exterior walls and sealant. Every yen spent inside before this is at risk.
2. Structure and pests. Termite treatment, rotten joists, and seismic work if the assessment calls for it, while the floors are up anyway.
3. Services. Electrical panel and wiring (old houses often have 30-amp supplies and no earth), plumbing, the water heater, the drain system.
4. Wet rooms. Kitchen, bath, toilet, washstand. These are where Japanese houses date fastest and where buyers notice most.
5. Comfort. Insulation and glazing. Japanese houses before the 1990s have very little of either, and a winter in an uninsulated farmhouse converts most owners to this line item.
6. Finishes. Floors, walls, lighting, the things that make the photographs.

Grants and subsidies

Japan wants its empty houses occupied, and pays for it, in two layers.

Municipal akiya grants. Most rural towns offer a renovation subsidy for a house bought through, or registered with, the local akiya bank. Typical terms: one third to one half of eligible costs, capped at ¥300,000 to ¥1,000,000, with some towns at ¥2 million or more for families who relocate. Common conditions: you register as a resident of the town, you use local contractors, you live in the house for five to ten years, and you apply before the work starts. Some towns add grants for removing the previous owner's belongings, for seismic work and for demolition. Foreigners qualify on the same terms as Japanese applicants where residency is the condition.

National programmes. The national government runs rolling subsidy programmes for insulation, high-efficiency windows and water heaters, seismic strengthening and long-life renovation, paid through the contractor. The programme names and budgets change every fiscal year and they are first come, first served, so this is a question to put to your contractor at quote time rather than something to plan around.

Grants reimburse after completion against receipts, so you fund the work first.

Contractors, quotes and timing

The local kōmuten (工務店), the builder who has worked in the village for thirty years, is usually the best value and knows how the local houses were built. National renovation chains quote faster and in better English but charge more and subcontract the work anyway. Get two or three written quotes (相見積もり) itemised by line; a single lump sum is not a quote.

Expect to wait. Good rural builders are booked one to three months ahead, and a comfortable-level renovation takes two to four months on site. Winter slows work in snow country.

What you cannot do yourself. Japan is relaxed about DIY in general, but electrical work needs a licensed electrician, gas work a licensed fitter, and structural changes or extensions over 10 m² in urban zones need a building confirmation. Everything else, including demolition of interiors, flooring, painting and carpentry, is yours if you want it.

Running a renovation from abroad

The hard part is not the money; it is being 9,000 kilometres from the decisions. What works: an inspection and an itemised scope before you buy, a fixed-price contract with a payment schedule tied to stages, weekly photo updates, and one person in Japan with authority to answer the builder's questions the same day. Akiya Air's renovation service does this: scope and quotes, grant applications, contractor selection, site visits and progress reports, and the final inspection before you release the last payment.

Frequently asked questions

Send us a listing and we will give you a renovation estimate before you make an offer: the renovation service, or a free 20-minute call.