Real cost ranges for Tokyo, Japan, priced in JPY. Every row is what homeowners actually spend across the scope spectrum — the low end is a pull-and-replace on the existing footprint, the high end is a full custom build with premium finishes.
~1 min readUpdated 18 Apr 2026
Cabinets, counters, appliances, and plumbing/electrical updates drive the range. The top of the band reflects full layout changes and premium finishes; the bottom holds for pull-and-replace scopes on the existing footprint.
Scope yours with Baily in TokyoTile, fixtures, and waterproofing are the big drivers. Primary and ensuite bathrooms with walk-in showers or freestanding tubs sit near the top of the band; hall baths come in closer to the bottom.
Scope yours with Baily in TokyoDetached units and garage conversions vary most by square footage, foundation type, and utility runs. Where local law does not recognize ADUs, this row maps to the nearest annex / granny-flat / laneway equivalent.
Scope yours with Baily in TokyoWhole-home scope covers all trades plus permitting, structural, MEP, and finishes. Historic properties, listed buildings, and seismic-retrofit markets sit well above the median.
Scope yours with Baily in TokyoMaterial choice (asphalt shingle, tile, standing-seam metal, membrane) dominates the range. Pitch, access, and city-specific wind/fire codes add the rest.
Scope yours with Baily in TokyoComposite decking, hardwood, pavers, and concrete slab are the main price bands. Elevated decks and outdoor-kitchen integrations push the high end.
Scope yours with Baily in TokyoFraming, insulation, egress windows, and waterproofing move together. Adding a bathroom or full kitchen pushes the cost well above the base finish scope.
Scope yours with Baily in TokyoGunite, vinyl-liner, and fiberglass each have distinct price bands. Spa integration, water features, and decking lift the top of the range.
Scope yours with Baily in TokyoPrep work (siding repair, pressure wash, priming) is the hidden driver. Coastal and high-UV markets use specialty coatings that cost more but last longer.
Scope yours with Baily in TokyoHardwood, LVP, tile, and stone span a wide range. Subfloor repair and leveling for old construction add meaningful cost on top of the finish material.
Scope yours with Baily in TokyoBailyに東京のリノベーションをご相談いただければ、十二社の工務店から一斉に電話が鳴ることはございません。東京を海外市場として最初に構えたのは、この街の住宅事情が他の都市と根本的に異なるからです。青山の築五十年の一戸建て、広尾のタワーマンション、世田谷区の木造二階建て、代官山のデザイナーズ物件は、それぞれ求められる工事の種類も、建築確認の流れも、管理組合や景観条例との関わり方も異なります。Bailyはその全ての背景を把握したうえで、お客様のご物件とプロジェクトに最も適した、建設業許可を有する東京の工務店を一社だけご紹介いたします。HomeProudや類似のプラットフォームのように、お客様のご連絡先を十二社に配信することはいたしません。建築基準法、耐震補強、景観条例を熟知し、区役所の建築指導課との対話にも慣れた、監理技術者を擁する工務店一社が、見積もりから引き渡しまで一貫して担当いたします。東京でこそ、このワンプロ方式が最も効果を発揮すると私たちは考えております。
Read the full Tokyo guideCost ranges are only half the picture. See how one-builder scoping compares to a bid fan-out before you talk to either.
Tell Baily what you are planning. You will get one vetted local builder, not a pool of strangers. No lead auction, no resold contact details.
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