ARB registration against RIBA membership: what differs

Only one of these two things is regulated by law. Registration with the Architects Registration Board is what allows a person to call themselves an architect in the United Kingdom, because section 20 of the Architects Act 1997 makes it an offence to use the title in business without being on the Register. Membership of the Royal Institute of British Architects is voluntary, and the letters RIBA after a name tell you the person has chosen to join a professional institute, pays its subscription and is bound by its code.

Most architects are both. Some are only registered. A few practices are staffed entirely by people who are neither, and they can still design your extension and submit your planning application perfectly lawfully.

Which title is protected in law

The Architects Act 1997 protects the word architect as a business title. Using it when not registered is a criminal offence, prosecuted by the Board, and it applies to trading names as well as to individuals.

What the Act does not protect is the activity. There is no legal requirement to use an architect to design a building, to prepare drawings, or to make a planning application. Compare that with other regulated activities in construction, where a specific competence is a legal requirement: an ecologist handling bats needs a licence, an approved inspector needs registration, and a person preparing an environmental statement must be a competent expert under the environmental impact assessment regulations.

So the protection is about the name, not about who may do the work. That distinction is the source of most of the confusion.

What the registration board regulates

The Board maintains the statutory Register, prescribes the qualifications and the examination route that lead to it, publishes a code of conduct and practice that registered persons must follow, and investigates allegations of unacceptable professional conduct or serious professional incompetence.

Its sanctions run from a reprimand to erasure from the Register, which removes the right to use the title. It also requires registered persons to hold adequate and appropriate professional indemnity insurance, which matters more to a homeowner than any of the rest of it.

What the Board does not do is award you compensation. It is a regulator of conduct, not a claims service, so a financial dispute goes down the contractual route regardless of the conduct finding.

What the institute provides

The institute is a membership body. It runs a chartered practice scheme with requirements on insurance, quality management and employment practices, publishes the plan of work that structures most architectural appointments, maintains specialist registers including one for conservation, provides standard forms of appointment, and offers a client complaints route for its members.

For a homeowner, the practical value of chartered practice status is the insurance and the standard contract, not the badge. A small practice run by a registered architect without chartered practice status may be a better fit for a house extension than a large chartered practice, and the reverse is true for a complex listed building repair.

The conservation register is the exception worth caring about. Where a project involves a listed building, the accreditation tiers on that register say something specific about assessed conservation experience, and some grant schemes require it.

Architectural technologists and designers

Titles that are not protected include architectural technologist, architectural designer, architectural consultant, building designer and architectural services. Any of these people may lawfully produce drawings and submit applications.

Architectural technologists have their own institute and their own chartered status, and the discipline is oriented towards technical design and construction detailing. Many are excellent at exactly the kind of work a domestic extension needs. Plenty of planning agents are former local authority officers with no design qualification at all, and for a straightforward application their knowledge of the validation list and the officer's expectations may be worth more than design flair.

The honest position: the qualification predicts very little about the quality of a small residential project. What predicts it is the portfolio, the references and whether the person has done that specific thing in that specific area before.

Insurance and complaints routes

Ask three questions of anybody you appoint, whatever their letters.

1. Do you hold professional indemnity insurance, at what level, and will you send me the certificate?
2. What happens if the council refuses the application: is a resubmission included in the fee?
3. Who carries the risk if a drawing is wrong and the building is built to it?

Where the person is registered, a conduct complaint goes to the Board. Where they are an institute member, the institute has its own complaints procedure. Where they are neither, your route is the contract, plus trading standards for misleading claims and the courts for loss. That is a material difference in practice, and it is the strongest argument for using a registered architect on anything expensive.

Check the title claim as well. If a person or a practice is using the word architect, they must be registered, and the Register is publicly searchable.

One further point on fees. A registered architect's insurance premium is part of their overhead, so an hourly rate that looks high against an unregistered designer's is not comparing like with like. The gap narrows once you account for what happens when something goes wrong.

Checking the register

Search the statutory Register directly rather than relying on a website's claim. A registration number, the name as registered and the current status take two minutes to confirm, and a practice name including the word architects should correspond to at least one registered person.

The institute's own directory of members and chartered practices is a separate search, useful for finding a practice rather than for verifying a title. If a practice trades under a name including the word architects while no registered person appears against it, that is worth raising with the Board rather than ignoring, because it usually indicates a wider problem with how the business presents itself. Both are worth doing before you sign anything, and neither replaces asking for two recent clients you can telephone.

What this means for a planning application

Nothing, procedurally. A planning application can be made by anybody, and the case officer will not ask who drew the plans. What varies is whether the drawings are accurate, whether the scheme responds to local policy, and whether the supporting documents say what the validation list requires.

Where the design work is technically demanding, the picture is changing at the other end of the process. Under the building safety regime, dutyholders including the principal designer must be competent for the work they take on, and that competence is assessed against the specific project rather than by title. The competence expectations in the building safety regime apply to a house extension as well as to a tall building, at a proportionate level.

For most homeowners the practical sequence is simple. Decide whether the project needs design thinking or administrative competence, appoint accordingly, confirm insurance and the title claim, and get the supporting documents right. Where several specialists are needed, the choice between a multidisciplinary practice and separate specialists matters more than the letters after any one name, and a reviewer from the professional directory can check a drafted document before it goes in.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.