The short answer
No — you don't need an architect for Building Regulations. Building Control needs technical drawings and, usually, structural calculations that show the work meets the regulations — covering structure, fire safety, insulation, ventilation, drainage and more. Those can be prepared by an architect, an architectural technologist, a structural engineer, or a competent builder; the regulations care about whether the work complies, not about who drew it. You can apply for Building Regulations approval via a full plans application or a building notice to your local authority Building Control, or use an approved inspector. "Architect" is a protected title, but Building Regulations design is not reserved to architects — for many projects an architectural technologist (whose training is specifically technical) is the natural choice, with a structural engineer for any beams and load paths.
Building Regulations are a separate process from planning, and they're about how a building is constructed rather than how it looks. Here's what Building Control needs, who can prepare it, and how the approval routes differ.
Building Regulations at a glance
- Architect required?No
- What's assessedConstruction compliance
- Key documentsTechnical drawings + calcs
- Approval routesFull plans / building notice
- Who checksBuilding Control
What Building Regulations approval involves
Building Regulations set the minimum standards for the design and construction of buildings, grouped into parts (structure, fire, insulation, ventilation, drainage, electrical safety under Part P, and so on). For most home projects you'll need to demonstrate compliance through:
- Technical construction drawings — sections and details showing foundations, walls, floors, roof build-ups, insulation and junctions.
- Structural calculations where there's any structural change — beams, lintels, foundations or load-bearing alterations.
- Specifications confirming materials and U-values, drainage layouts, fire escape and ventilation provision.
Building Control then checks the design and inspects the work on site at key stages, ending with a completion certificate. None of this names an architect — it requires competent technical design.
Who can produce the drawings and calculations
For Building Regulations specifically, the work is more technical than aesthetic, which is why an architectural technologist — trained precisely in the technology and detailing of buildings — is often a strong fit, alongside a structural engineer for the calculations.
| Route | Strength for Building Regs | Relative cost |
|---|---|---|
| Architectural technologist | Technical detailing and compliance | Mid |
| Structural engineer | Beams, foundations, calculations | Add-on |
| Architect (ARB/RIBA) | Full design + can coordinate technical | Higher |
| Competent builder | Simple, standard work | Lowest |
Indicative comparison for guidance only. Sources: CIAT and Planning Portal guidance.
The two approval routes
There are two main ways to get Building Regulations sign-off, and your designer or builder will usually advise which suits the job:
- Full plans application: you submit detailed drawings and calculations for Building Control to check and approve before work starts. This gives certainty up front and is the sensible route for anything structural or complex — most extensions and loft conversions go this way.
- Building notice: a lighter-touch route for simpler work where you notify Building Control and they inspect as you go, without full drawings being pre-approved. It suits straightforward jobs but carries the risk of being told to change something mid-build.
You can use your local authority Building Control or a private approved inspector. Either way, the requirement is competent technical design and proper inspection — not an architect. The honest position is the same as for planning: an architect is one capable route, but a technologist plus a structural engineer is frequently the more economical and equally compliant choice for Building Regulations work.
Frequently asked questions
Is Building Regulations approval separate from planning permission?
Yes. Planning permission concerns whether you can build something and how it looks; Building Regulations concern how it's built safely and to standard. Most extensions and conversions need both, and they're assessed by different teams under different rules.
Who produces drawings for Building Regulations?
An architectural technologist, structural engineer, architect or competent builder can all produce Building Regulations drawings and calculations. The technical detailing and structural calculations are the key outputs, so technologists and engineers are commonly used for this stage.
What's the difference between full plans and a building notice?
A full plans application has Building Control check and approve detailed drawings before work starts, giving certainty up front. A building notice is a lighter route for simpler jobs where inspection happens as work proceeds, with less pre-approval — and more risk of being told to change something.
Sources & further reading
- Planning Portal — Building Regulations
- CIAT — what is an architectural technologist
- GOV.UK — building regulations approval
Figures on this page are typical UK ranges drawn from published sources and depend on your specific project. They are guidance, not a quotation.