Do You Need an Architect for a Home Addition in Nova Scotia?
For most home additions in Nova Scotia, you do not legally need an architect. Section 56 of the Nova Scotia Architects Act lets people who are not licensed architects design a one-dwelling or two-dwelling unit, and residential buildings of three storeys or less with a building area of up to 450 square metres, unless an architect is required by some other law or by the building official. What you do need is a set of plans the municipality will accept, and a professional engineer for any structural member that the Part 9 tables of the building code do not cover. Who draws those plans is your choice: an architect, a residential designer or technologist working with an engineer, or a design-build firm that handles design and construction together.
What the Nova Scotia Architects Act actually says
The Architects Act (Chapter 12 of the Acts of 2006) starts from a broad rule. Section 52 says no one shall build, alter or enlarge a building where the design of the plans "falls within the practice of architecture" unless those plans are prepared by a licensed architect. The same section then points to the exceptions in Sections 54 and 56.
Section 56(2)(a) is the one that matters to homeowners. Nothing in the Act prevents the practice of architecture by people other than licensed architects for a building, as constructed, enlarged or altered, that is used as:
- a one-dwelling or two-dwelling unit, or
- a building of three storeys or less, with a building area of not more than 450 square metres, classified as residential, business and personal services, mercantile, or low and medium hazard industrial occupancy.
The exemption carries one condition: it applies "unless a licensed architect is otherwise required by law or by the building authority having jurisdiction over the project." A single-family house with a kitchen addition, a sunroom, a garage, or a full second storey sits comfortably inside the first category. Section 54 separately confirms that the Act does not restrict professional engineers working within their own profession, or registered interior designers working under the Interior Designers Act.
When an architect is required
The picture changes for larger buildings. Under section 30 of the Nova Scotia Building Code Regulations, an owner building under Part 3 or Part 4 of Division B of the National Building Code must ensure that "an architect, professional engineer or interior designer, as required," is appointed to design the building and to carry out field review during construction. Part 3 covers larger and more complex buildings, so this is the territory of apartment buildings, mixed-use projects, and commercial space rather than a house addition.
For a house, you need an architect only if the project goes beyond the section 56 limits or the building official requires one. For a typical addition in Halifax, Dartmouth or Bedford, neither applies.
When you need a structural engineer for an addition
An engineer is the professional you are more likely to need. Two sections of the Building Code Regulations decide it:
- Section 31: if the dimensions of a structural component are not provided in Part 9 of the National Building Code, and have to be worked out by calculation, testing or other evaluation, the owner must appoint a professional engineer to design that component. A building official can also ask for a certificate of commitment for field review.
- Section 32: if the site conditions, size or complexity of the project warrant it, a building official may require additional letters of undertaking and certificates of commitment from design professionals.
In an addition, this tends to come up at the points where loads concentrate: a beam carrying a new floor across a wide opening, a long clear span in a great room or a second storey addition sitting on walls and footings that were never designed for it. Whether a particular member is inside the Part 9 tables is something your designer checks during design, not something to guess at. Our article on structural engineering for second storey additions goes further into that case.
Protected titles: who can call themselves what
Titles in this field are regulated, and they tell you what a person is licensed to do.
- Architect. Section 51 of the Architects Act reserves the titles "Architect", "Registered Architect" and "Architectural Designer" for people licensed under the Act.
- Interior Designer. Section 19 of the Interior Designers Act says no one shall use the title "Interior Designer", or any extension or abbreviation of it, unless entitled under that Act.
- Professional engineer. Engineers practise under the Engineering Profession Act, which the Architects Act recognises in Section 54.
- Technologists. TechNova administers Nova Scotia's Applied Science Technology Act, which governs the use of designations such as CET (Certified Engineering Technologist) and C.Tech.
Someone who draws house plans without one of those licences is usually described as a residential or building designer. That is legitimate work for a house under section 56, as long as they do not use a protected title and an engineer covers anything outside Part 9.
Your realistic options for designing an addition
| Option | What you get | Where it fits | What to watch |
|---|---|---|---|
| Architect | Full design, drawings and specifications, and often contract administration | Large or architecturally ambitious projects, heritage work, anything beyond the section 56 limits | Design is finished before builders price it, so the budget is tested late |
| Residential designer or technologist | Permit drawings for a Part 9 house | Straightforward additions where you already know what you want | Structural members outside Part 9 still need an engineer, and pricing comes later |
| Structural engineer | Design of beams, footings, connections, and field review | Alongside any of the other options, wherever section 31 or 32 applies | An engineer designs the structure, not the layout or the finishes |
| Design-build firm | Design, engineering coordination, permits and construction under one contract | Homeowners who want the design priced as it is drawn | Check that the firm's designers and engineers are named and that the contract is fixed-price |
What HRM needs to see on the permit application
In Halifax Regional Municipality, any project that increases the floor area or height of an existing building needs a building permit. Section 14 of the Building Code Regulations requires the application to name each person doing the work, including any "architect," "professional engineer," and "interior designer or other designer." The list itself shows that the regulations expect more than one kind of designer.
HRM's construction plan checklist asks for floor plans, the size, spacing and span of framing members, "detailed information about beams and columns supporting loads," a cross section, elevations, and a site plan. Whoever designs your addition produces that, with an engineer's drawings alongside where sections 31 or 32 apply. Our guide to permits for a home addition in Nova Scotia covers the rest of the process.
How we handle design on an addition
HGC Design + Build is a design-build firm. The design team that draws your addition works in the same company that builds it, out of our design centre at 2569 Windsor St in Halifax. You see the addition in 3D renderings before anything is committed, structural members that need an engineer are engineered and included in the drawings, and the project is priced as it is designed, so the plan and the budget arrive together. Once the design is settled you get a fixed-price contract, and we prepare the permit submission.
The first consultation is free. It is the place to talk through what you want from a home addition in Halifax, or anywhere else we build home additions across Nova Scotia. If the addition includes a new kitchen, our kitchen design process runs inside the same project rather than as a separate job.
Frequently Asked Questions
Is an architect legally required for a house addition in Nova Scotia?
Usually not. Section 56(2)(a) of the Architects Act allows people other than licensed architects to design one-dwelling and two-dwelling units, and residential buildings of three storeys or less with a building area up to 450 square metres, unless another law or the building official requires an architect.
Do I need a structural engineer for my addition?
You need one for any structural component whose size is not provided in Part 9 of the National Building Code and has to be calculated, under section 31 of the Nova Scotia Building Code Regulations. A building official can also require professional design and review under section 32 where site conditions, size or complexity warrant it.
Can a residential designer draw my addition plans?
Yes, for a house within the section 56 limits. They cannot call themselves an architect, registered architect, architectural designer or interior designer unless licensed, and an engineer still has to design any member outside the Part 9 tables.
Who has to be named on an HRM building permit application?
Section 14 of the Nova Scotia Building Code Regulations requires the application to give the name, address and phone number of the owner and of each person doing the work, which includes any architect, professional engineer, and interior designer or other designer.
Does a design-build firm replace an engineer?
No. A design-build firm handles layout, drawings, permits and construction, and brings in a professional engineer for the structural components that need one.
If you are planning an addition and want to know what it will take to design and build it, book a free consultation and we will walk through the space, the structure, and the permit with you. You can also call us at (902) 454-2273.
.jpeg)
