Japanese house renovation costs in 2026 range from ¥1,000,000 for cosmetic work to ¥15,000,000+ for full structural renovation. This guide breaks down every tier with line-item costs, regional multipliers, and timelines — so you know what you are getting into before you buy.
Tier 1 — Cosmetic Renovation (化粧工事)
Make it liveable without structural changes
- Interior painting and wallpaper replacement
- Flooring replacement (tatami refresh, CF sheet, laminate)
- Fixture replacement (lights, outlets, taps)
- Kitchen cleaning and minor fixture updates
- Bathroom fixture replacement (not unit)
- Garden clearing and basic exterior cleanup
This level is appropriate for properties in structurally sound condition that simply need freshening up. Most akiya that have been vacant for 5–10 years fall into this category if the roof and foundation are intact.
Tier 2 — Moderate Renovation (部分改修)
Replace major systems and wet areas
- Full kitchen replacement (unit + installation)
- Full bathroom unit replacement
- Roof repairs (partial re-tiling, flashing, waterproofing)
- Electrical panel upgrade and rewiring (partial)
- Plumbing updates (water heater, drainage)
- Ceiling insulation
- One-room structural repair if needed
This is the most common renovation scope for akiya purchases. Properties vacant for 10–20 years typically need wet area replacement and roof attention at minimum.
Tier 3 — Full Renovation (フルリフォーム)
Strip back to structure and rebuild
- Complete interior demolition and rebuild
- Full structural assessment and repair
- Complete electrical rewiring
- Complete plumbing replacement
- Full roof replacement
- Foundation reinforcement if needed
- Full building insulation (walls, floor, ceiling)
- Custom kitchen and bathroom design
- Seismic retrofit (if pre-1981 building)
Full renovation approaches the cost of new construction but preserves the existing structure, which is important for non-rebuildable properties where demolition and rebuild is not permitted.
Line-item cost reference
| Item | Cost Range | Notes |
|---|---|---|
| Kitchen unit + install | ¥500,000–¥1,200,000 | Standard system kitchen |
| Bathroom unit + install | ¥450,000–¥1,000,000 | Unit bath (standard size) |
| Toilet replacement | ¥80,000–¥250,000 | Washlet included |
| Roof re-tiling (partial) | ¥300,000–¥800,000 | Japanese tile |
| Roof replacement (full) | ¥800,000–¥2,000,000 | Metal or tile |
| Electrical panel + rewire | ¥300,000–¥800,000 | Full house |
| Flooring (per room) | ¥50,000–¥200,000 | Laminate to hardwood |
| Tatami replacement (6 mat) | ¥30,000–¥90,000 | Standard quality |
| Interior painting (whole house) | ¥200,000–¥500,000 | 80–120sqm house |
| Seismic retrofit | ¥1,000,000–¥2,500,000 | Pre-1981 wooden structure |
| Demolition | ¥25,000–¥50,000/tsubo | Wooden structure |
Regional cost multipliers
Labour costs vary significantly by region. Apply these multipliers to the base costs above.
| Region | Multiplier | Example |
|---|---|---|
| Tokyo | 1.3–1.5x | ¥3M base = ¥3.9M–¥4.5M |
| Osaka / Nagoya / Fukuoka | 1.1–1.2x | ¥3M base = ¥3.3M–¥3.6M |
| Regional cities | 1.0x | ¥3M base = ¥3M |
| Rural areas | 0.9–1.0x | ¥3M base = ¥2.7M–¥3M |
Rural areas have lower labour costs but may have limited contractor availability, which can extend timelines. Remote or island locations may incur additional transport costs for materials.
Renovation tiers compared
| Cosmetic (T1) | Moderate (T2) | Full (T3) | |
|---|---|---|---|
| Cost | ¥1M–¥3M | ¥3M–¥8M | ¥10M–¥25M |
| Per sqm | ¥8K–¥25K | ¥25K–¥65K | ¥65K–¥130K |
| Duration | 4–8 weeks | 8–16 weeks | 16–32 weeks |
| Kitchen | Clean only | Full replacement | Custom |
| Bathroom | Fixtures only | Unit replacement | Full redesign |
| Roof | None | Repairs | Full replacement |
| Structure | None | Targeted repairs | Full assessment |
| Insulation | None | Ceiling only | Full building |
When to renovate vs demolish
The decision depends on three factors:
- Can you rebuild? If the property has a non-rebuildable flag, demolition means losing the house permanently. Renovation is your only option.
- What does it cost? If full renovation exceeds ¥15,000,000 and new construction would cost ¥15,000,000–¥20,000,000, new build may be better value — if permitted.
- What do you want? Kominka (traditional houses) have architectural value that cannot be replicated in new construction. Many buyers specifically want the character of old timber and traditional layouts.
Renovation subsidies cover 20–50% of costs up to ¥3,000,000 in many municipalities. Seismic retrofit subsidies add up to ¥1,200,000 for pre-1981 buildings. Read the full grants guide or use the Grant Finder to check eligibility.