Commercial tenant fit-outs often require more than architectural drawings. If the project includes changes to HVAC, plumbing, drainage, fire protection, or electrical systems, mechanical and electrical drawings may also be required for the building permit.

This applies to many types of commercial spaces, including offices, retail units, restaurants, medical clinics, dental clinics, salons, gyms, and mixed-use buildings.

At RN Engineering, we prepare mechanical and electrical permit drawings for commercial tenant fit-out projects across Ontario.

What Is a Tenant Fit-Out?

A tenant fit-out is the process of preparing an existing commercial space for a new tenant or business use. This may include interior partitions, new washrooms, lighting, HVAC changes, plumbing fixtures, equipment installation, and fire protection coordination.

Common tenant fit-out projects include:

Office spaces
Retail stores
Restaurants and cafés
Medical clinics
Dental clinics
Hair salons
Wellness studios
Gyms
Commercial kitchens
Mixed-use units

Why Mechanical and Electrical Drawings May Be Needed

Even if the existing building already has HVAC, plumbing, and electrical systems, the new tenant layout may change the requirements.

For example:

New rooms may need supply and return air
New washrooms may require plumbing and drainage design
New kitchen equipment may require exhaust and electrical power
New ceilings may affect sprinkler layout
New lighting may require electrical design
Change of use may trigger additional review

Mechanical and electrical drawings help show how the new tenant space will be serviced.

HVAC Design for Tenant Fit-Outs

HVAC design is important for comfort, ventilation, and code coordination. Depending on the project, HVAC drawings may show:

Supply air layout
Return air layout
Exhaust air layout
Ductwork routing
Diffuser and grille locations
Thermostat locations
HVAC equipment
Ventilation information
Mechanical schedules

For offices, retail units, clinics, restaurants, and salons, proper ventilation and air distribution are important for occupant comfort and system performance.

Plumbing and Drainage Design

Plumbing and drainage drawings may be required when the tenant space includes:

Washrooms
Sinks
Kitchen equipment
Laundry connections
Floor drains
Mop sinks
Dental or medical plumbing fixtures
Grease or oil interceptor connections

Plumbing drawings may include domestic water piping, sanitary drainage, vent piping, fixture connections, pipe sizing, and riser diagrams.

Fire Protection Design and Review

Fire protection may need to be reviewed when the layout changes or new ceilings and partitions are added.

Fire protection items may include:

Sprinkler head coordination
Fire protection layout updates
Fire alarm coordination
Standpipe or hose cabinet considerations where applicable
Coordination with architectural layout
Review of existing fire protection systems

Even if the sprinkler system already exists, changes to walls, ceilings, or room layouts may require coordination.

Electrical Design

Electrical drawings may be required for lighting, power, equipment, panel schedules, emergency lighting, exit signs, and fire alarm coordination.

Electrical drawings may include:

Lighting layout
Power layout
Panel schedule
Electrical load information
Equipment connections
Emergency lighting
Exit signage
Fire alarm coordination

For commercial fit-outs, electrical coordination is very important because business equipment may require specific power connections.

Common Permit Issues in Tenant Fit-Outs

Tenant fit-out permits can be delayed when drawings are missing or not coordinated.

Common issues include:

HVAC layout not provided
Plumbing riser missing
Electrical panel schedule missing
Fire protection scope unclear
Equipment not coordinated
Ceiling layout conflicts with diffusers, lights, or sprinklers
Existing site conditions not matching the drawings
Architectural and engineering drawings not coordinated

A coordinated drawing package can help reduce these issues.

How RN Engineering Can Help

RN Engineering supports commercial tenant fit-out projects across Ontario with mechanical and electrical design services.

Our services include:

HVAC design
Plumbing & drainage design
Fire protection design
Electrical design
Permit drawings
Construction drawings
Permit comment responses

We work with architects, design-build companies, contractors, property owners, and business owners.

Need Tenant Fit-Out Permit Drawings?

Whether your project is a small office renovation, a retail unit, a restaurant, a clinic, or a larger commercial fit-out, RN Engineering can support your mechanical and electrical design needs.

You can get a quote by visiting www.rnengineering.ca and filling out our form, or sending a WhatsApp message / calling 437-427-0102.