What kind of property does a dental laboratory need? (Health-centre notification and structural equipment)

In short: three things bite first for a dental-laboratory property. (1) Zoning — unlike a clinic, a dental laboratory uses motors and may be treated as a "workshop (factory)" under the Building Standards Act use restrictions. (2) Structural-equipment standard — Art. 13-2 of the Dental Technicians Act Ordinance requires machinery to be safely and fire-safely placed with an area of 10 m² or more, adequate lighting and ventilation, and structures/equipment to prevent dust and microbial contamination. (3) The notification — Dental Technicians Act Art. 21 is an after-the-fact filing to the health centre (prefectural governor etc.) within 10 days of opening, so you set up the equipment first. We begin from viewing the property's use and equipment.

"I've been supplying dental work to a clinic, but I want to open my own laboratory" is an enquiry we hear more and more. A dental laboratory cannot, unlike a clinic, be built in all 13 zoning districts, and its plumbing, ventilation and dust conditions are distinctive. This article is for independent dental technicians renting a tenancy or house to open a laboratory: what you can confirm before signing, from the real-estate side, set out from the Dental Technicians Act, its Ordinance and the Building Standards Act, plus health-centre guidance. We handle viewing the property's use and equipment, brokerage and the contract; the opening-notification documents go to an administrative scrivener, structural/equipment design and interior works to an architect and builder, and the notification's name-holder and dental-technique judgements to the dental technician — each split as an independent business entity.

Where do you first get stuck on a property for a dental laboratory?

The assumption that "I can choose a property the same way as for a clinic" is the first stumble.

Dental Technicians Act Art. 2(3) defines a dental laboratory as "a place where a dentist or dental technician performs dental technique as a business." The key point is that a dental laboratory is different from a clinic (a medical-care facility). A clinic can, under the Building Standards Act, be built in all 13 zoning districts. A dental laboratory, by contrast, uses motors — grinders, electric furnaces, polishers — so under the Building Standards Act use restrictions it may be treated as a "workshop (factory)," and can hit floor-area or motor limits in residential zones.

You get stuck on three points. First, whether the building use is restricted as a "workshop (factory)" in the zoning district. Second, whether the property can meet the Ordinance's structural-equipment standard (area, ventilation, dust, plumbing). Third, the timing of the notification and the manager requirement. We go through them in turn.

Are zoning and building use a problem for a dental laboratory too?

For a clinic they are not, but a dental laboratory may be treated as a "workshop (factory)," so it can be narrowed by zoning.

Appended Table 2 of the Building Standards Act sets, by zoning district, the building uses that may be built. A workshop (factory) using motors varies in which districts it may be built by its floor area and type of motor. The general picture is below, but whether a dental laboratory counts as a "workshop (factory)," and how the motor output or workshop floor area is calculated, is ultimately for the specified administrative agency (the local authority with a building official) to judge. Treat individual properties as unverified and confirm with the agency's building-guidance section before signing.

Zoning district	Treatment of a workshop (factory) using motors (general)
Cat. 1/2 low-rise residential, Cat. 1 mid/high-rise residential	In principle a workshop (factory) cannot be built
Cat. 2 mid/high-rise residential, Cat. 1/2 residential, quasi-residential	Cap on workshop floor area / motors (roughly small-scale)
Neighbourhood commercial, commercial	Allowed up to a certain scale
Quasi-industrial, industrial, exclusive industrial	Allowed with no area limit (residential coexistence confirmed separately)

Reading this against what to confirm before signing for a clinic property and against a pharmacy or acupuncture clinic in what a dispensing pharmacy property needs and what to confirm on zoning and the health-centre notification for an acupuncture/judo-therapy clinic shows how a dental laboratory leans "workshop-type" rather than "clinic-type." When converting an existing second-hand property, if the part used for that purpose is a special building and its floor area exceeds 200 m², a change-of-use confirmation application may be required (Building Standards Act Art. 87), so see also the thinking in can a second-hand property without a certificate of inspection be converted to a welfare facility.

How do you tell whether a property meets the structural-equipment standard (ventilation, dust, plumbing)?

You apply Art. 13-2 of the Dental Technicians Act Ordinance to the property's current state.

Ordinance Art. 13-2 (Ministry of Health and Welfare Ordinance No. 23 of 22 September 1955) sets standards such as: equipment and instruments needed for dental technique; that they are arranged so as not to impede smooth, appropriate work and are easy to clean and maintain; that machinery can be placed without impeding safety or fire safety and there is an area of 10 m² or more; that the floor is board, concrete or equivalent and doors/windows can be closed; that lighting and ventilation are adequate and work is done in a clean environment; and that there are structures/equipment necessary to prevent dust (particulates) or microbial contamination arising from dental technique.

When viewing a property, confirm the following can be met.

Item	What to look at in the property
Area	Can you secure 10 m² or more for the technique room
Ventilation / dust	Is there an opening/duct route for an exhaust fan or dust collector (outdoor exhaust preferred)
Plumbing	Is there a sink/drain that copes with plaster and grinding dust (whether a plaster trap can be retrofitted)
Electrical capacity	Is the contracted power/panel enough for simultaneous use of an electric furnace, casting machine, compressor
Floor / fire safety	Is the floor board/concrete etc. and can machinery be placed without impeding fire safety

Interior/equipment design and works are the field of the architect and builder, which we cannot do. Also, the operation of the standard (specific figures for ventilation volume or dust collection, treatment of plaster drainage) can differ by health centre, so this article does not assert specific figures and treats them as unverified. Confirm directly in the health centre's dental-laboratory opening guide before narrowing properties. We assist, from the real-estate side, with a read on whether a property is likely to meet the standard.

Is the health-centre notification filed before or after the property is decided?

The notification is "after." You fit out the property, bring the structural equipment up to standard, then file within 10 days of opening.

Dental Technicians Act Art. 21 provides that a person who has opened a dental laboratory must, within 10 days of opening, notify the prefectural governor of the laboratory's location (the mayor/ward mayor where it is in a city or special ward with a health centre) of the place of opening, the manager's name and other matters set by ordinance. Unlike the "prior permission" for a restaurant, this is a notification after opening. Suspension, abolition and resumption likewise require notification within 10 days.

Another key point is the manager. Dental Technicians Act Art. 22 provides that, except where the opener is themselves a dentist or dental technician and becomes the manager, a dentist or dental technician must be placed as manager. Whoever the opener is, the laboratory's manager must be a qualified person.

Stage	What to do	Who moves
1	Select/broker/contract a property that can meet zoning and structural equipment	Yotsuba Real Estate Co., Ltd. (licensed real estate agent)
2	Design/works for interior, ventilation, plumbing, dust equipment	Architect / builder
3	Bring structural equipment up to standard	Opener / builder
4	Notify the health centre within 10 days of opening (Art. 21)	Opener (document support by an administrative scrivener)

Get the order wrong and you file before the equipment is ready and are sent back, or sign without noticing the use restriction. Starting from a read on the property's use and equipment is safer.

Who do you ask for what? (notification = dental technician / documents = administrative scrivener / design = architect)

The roles split. A dental laboratory involves many parties, so a little sorting at the outset avoids confusion.

What to do	Handler
Viewing zoning/structural equipment, brokerage, lease/sale contract	Yotsuba Real Estate Co., Ltd. (licensed real estate agent)
Support preparing documents filed with the health centre, such as the opening notification	Administrative scrivener
Technique-room design, change-of-use confirmation, interior/equipment works	Architect / builder
Notification name-holder, (qualified) manager, dental-technique judgements	Dental technician
Judgement on use restriction / whether a confirmation application is needed	Specified administrative agency (building-guidance section)

Viewing the property's use and equipment, brokerage and the contract are handled by Yotsuba Real Estate Co., Ltd. (licensed real estate agent, Tokyo Governor (1) No. 113304). Preparation of documents filed with public offices, such as the opening notification, is handled by Yotsuba Administrative Scrivener Office. These two are independent business entities, engaged each directly. Technique-room design, the confirmation application and interior works go to an architect/builder; the notification's name-holder, appointment of a manager and dental-technique judgements go to the dental technician (and the health centre) — each engaged by you directly. We neither pay nor accept referral fees or introduction commissions. Business-property consultation is at consultation on business and investment property; office-opening consultation is at consultation on opening an office. Consultation is free of charge.

Frequently asked questions

Q. Can a dental laboratory open in a tenancy in a residential area?
A. Unlike a clinic, a dental laboratory uses motors and may be treated as a "workshop (factory)" under the Building Standards Act use restrictions. In Category 1/2 low-rise residential and Category 1 mid/high-rise residential zones, a workshop (factory) in principle cannot be built. But whether a dental laboratory counts as a "factory," and how motor output or workshop floor area is calculated, is for the specified administrative agency to judge. Confirm with the agency's building-guidance section before narrowing properties.

Q. How much area and ventilation does the technique room need?
A. Ordinance Art. 13-2 requires that machinery can be placed without impeding safety or fire safety with an area of 10 m² or more, that lighting/ventilation are adequate and work is done in a clean environment, and that there are structures/equipment to prevent dust and microbial contamination. Since specific figures for ventilation and dust collection and the treatment of plaster drainage differ by health centre, confirm in the local health centre's guide before narrowing properties. We assist with a read on whether a property is likely to meet the standard.

Q. Should I file the opening notification before signing the property contract?
A. No. The Art. 21 opening notification is filed "within 10 days of opening" — an after-the-fact filing, not a prior permission like a restaurant licence. First fit out the property and bring the structural equipment up to standard, then open and file. Document support is by an administrative scrivener.

Q. Does the opener have to be a dental technician?
A. The opener themselves need not be qualified to open, but under Dental Technicians Act Art. 22, except where the opener is themselves a dentist or dental technician acting as manager, a dentist or dental technician must be placed as manager. The laboratory's manager is always qualified. The name-holder, manager and dental-technique judgements are the field of the person and the health centre; we show a read from the property side.

Sources (primary)

• e-Gov "歯科技工士法" (Dental Technicians Act) — Act No. 168 of 1955. Art. 2(3) (a dental laboratory is "a place where a dentist or dental technician performs dental technique as a business"); Art. 21 (within 10 days of opening, notify the location, manager's name etc. to the prefectural governor of the location, or the mayor/ward mayor in a city/special ward with a health centre); Art. 22 (except where the opener acts as a qualified manager, place a dentist or dental technician as manager). Accessed 10 September 2026.
• e-Gov "歯科技工士法施行規則" (Dental Technicians Act Ordinance) — Ministry of Health and Welfare Ordinance No. 23 of 22 September 1955. Art. 13-2 (structural-equipment standard for a dental laboratory: machinery safely and fire-safely placed with 10 m² or more; floor of board/concrete etc.; closable doors/windows; adequate lighting/ventilation and a clean environment; structures/equipment to prevent dust or microbial contamination). Accessed 10 September 2026.
• e-Gov "建築基準法" (Building Standards Act) — Act No. 201 of 1950. Appended Table 2 (building-use restriction by zoning district — whether a workshop (factory) using motors is allowed by floor area); Art. 87 (application, mutatis mutandis, of confirmation etc. to a change of use). Accessed 10 September 2026.

Whether a dental laboratory is a "workshop (factory)," the calculation of motor output/workshop floor area, and whether a change-of-use confirmation application is required should be confirmed with the specified administrative agency (building-guidance section) before signing. This article does not uniformly assert judgements that differ by locality/property (unverified). The specific operation of the structural-equipment standard (figures for ventilation, dust collection, plaster drainage) differs by health centre; confirm in the local health centre's dental-laboratory opening guide before narrowing properties (unverified).

This article is general information; it does not present individual legal or medical judgement. Preparation of documents filed with public offices, such as the opening notification, is by an administrative scrivener; technique-room design, confirmation application and interior works, by an architect/builder; the notification name-holder, appointment of a manager and dental-technique judgements, by the dental technician (and the health centre). Viewing, brokerage and the lease/sale contract are undertaken by Yotsuba Real Estate Co., Ltd. (licensed real estate agent); preparation of the permit documents, by Yotsuba Administrative Scrivener Office — independent business entities, engaged separately and directly. We neither pay nor accept referral fees.

About the author

Joji Uramatsu — licensed real estate transaction specialist (Tokyo Governor registration No. 293544) and administrative scrivener (registration No. 25087022). Representative Director, Yotsuba Real Estate Co., Ltd. (licensed real estate agent, Tokyo Governor (1) No. 113304); principal, Yotsuba Administrative Scrivener Office. Kohinata, Bunkyo, Tokyo, about five minutes' walk from Myogadani station. For a dental-laboratory property, zoning, the structural-equipment standard and the order of the opening notification are put on the same table. Full profile: author page.