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An architect designs buildings and alterations to them, and in most domestic projects also runs the approvals and, if you want, the contract with the builder. In the United Kingdom the job comes with something almost no other trade in this catalogue has: a word that the law reserves. Section 20(1) of the Architects Act 1997 says a person shall not practise or carry on business under any name, style or title containing the word architect unless he is a registered person, and section 21 makes a contravention an offence punishable on summary conviction by a fine not exceeding level 4 on the standard scale.

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The register is kept by the Architects Registration Board, an independent statutory regulator created by that Act. ARB describes the Architects Register as the only official list of every architect in the UK, and says that only those on the Register may use the title architect in business or practice. Every registered architect has a registration number and should give it to you if you ask. Checking that number takes a minute and is the single most useful thing you can do before you sign anything.

That protection is narrower than it looks. It covers the word itself, not the quality of any particular design, and it does not mean an architect is the right professional for every job. A loft conversion with no planning issue may need a technologist and a structural engineer rather than a full architectural service. What the title does guarantee is a known route in, a published code, and a regulator you can complain to.

What section 20 of the Architects Act 1997 actually says

The prohibition is on practising or carrying on business under any name, style or title containing the word architect unless you are a registered person. The Act names its own exceptions in the same section: naval architect, landscape architect and golf-course architect may be used without restriction, because those are different occupations that happen to share the word. Being employed by somebody else does not by itself count as practising for the purposes of the section.

Companies, firms and partnerships are dealt with separately. A business may use architect in its name where the architecture work is under the control and management of a registered person who does not hold a similar position in another such business, and where every place of business at which architecture work is done is either run by or under the regular supervision of a registered person. So a limited company can legitimately be called something-architects even though a company cannot itself be registered.

Section 21 supplies the teeth. Contravening section 20(1) is an offence, tried summarily, with a fine not exceeding level 4 on the standard scale. Unusually, prosecutors get two years rather than the normal six months to bring a case, because the Act modifies the ordinary time limits in the Magistrates' Courts Act 1980, the Magistrates' Courts (Northern Ireland) Order 1981 and the Criminal Procedure (Scotland) Act 1995. The Act is UK-wide, so this is one of the few rules in this catalogue that does not change when you cross a border.

ARB is the regulator; RIBA and RIAS are membership bodies

  • ARB is a statutory body set up by Parliament under the Architects Act 1997; it approves the qualifications, keeps the Register, issues the code of conduct and takes action when standards are not met.
  • ARB states plainly that it is not a membership body like RIBA or RIAS, and that membership of those organisations is voluntary and is not a legal requirement to practise as an architect.
  • RIBA is a professional membership body; its Chartered Practice scheme is a membership standard the practice opts into, not a licence, and RIAS plays the equivalent role in Scotland.
  • Someone can therefore be a fully registered architect without any RIBA letters, and a practice can be a Chartered Practice while the individual on your job is not the registered person.
  • If a claim to be an architect turns out to be false, the complaint goes to ARB through its misuse of title process, not to a membership body.
  • Ask which named registered person is responsible for your project, and check that name and number against the Register rather than the letterhead.

The ARB Code, insurance and written terms

Every registered architect is bound by the Architects Code: Standards of Conduct and Practice. The 2025 edition is built around six standards — honesty and integrity, public interest, competence, professional practice, communication and collaboration, and respect — with separate published guidance sitting underneath on professional indemnity insurance, terms of engagement, dealing with complaints, conflicts of interest and building safety. ARB says the Code applies to every architect on the Register regardless of where they are based or what kind of work they do.

Two practical consequences follow for a homeowner. ARB tells the public that registered architects hold professional indemnity insurance, which is the cover that responds if a design error costs you money later; and it says the level of fees must be agreed in writing in advance for any work. A verbal fee arrangement with an architect is therefore already a departure from what the regulator expects, and it is worth treating as a warning sign rather than a convenience.

Ask for the terms of engagement before any drawing is produced, and read what they say about the scope, what is excluded, who deals with the local authority and what happens if you stop the project part way. Fee disputes on domestic jobs almost always trace back to a scope that was never written down.

How a domestic architectural appointment usually runs

  • An initial visit and feasibility discussion, where the architect looks at the building, the site constraints and your budget before drawing anything.
  • A measured survey of the existing building, either done by the practice or subcontracted to a surveyor, which becomes the base drawing everything else is built on.
  • Concept design: sketch options for you to react to, usually with at least one you had not thought of, and one round of revisions built into the fee.
  • Developed design and the planning submission, if permission is needed, with the drawings prepared to the standard the local planning authority validates against.
  • Technical design for building control and for the builder, which is a different and more detailed set of information than the planning drawings.
  • Tendering and contract administration, which is optional on a domestic job and is where the architect prices the work with two or three builders and then inspects during construction.

What checking the Register does not tell you

Registration confirms that a person met ARB's requirements for entry and is subject to the Code. It says nothing about whether they have done a project like yours, whether they are any good at householder extensions specifically, or whether they have the capacity to start this year. Large-practice experience does not automatically transfer to a terraced house in a conservation area, and the reverse is equally true.

Registration also does not make the architect responsible for the builder's workmanship unless you have appointed them to administer the contract and inspect. Where you engage an architect for drawings only and then run the build yourself, the gap between design and execution is yours. Be explicit about which side of that line each service sits on.

Finally, the protected title covers the word architect and nothing adjacent. ARB has confirmed that it is unable to investigate the use of related terms such as architecture or architectural, because the Act does not cover them. Somebody offering an architectural service is not making an unlawful claim, and the next guide in this set is about how to judge them.

Where architect appointments go wrong on domestic jobs

  • The fee is quoted for a stage, but the project stops between stages and nobody agreed what happens to the drawings or the copyright.
  • The survey of the existing building was assumed rather than measured, and the design does not fit the house when the walls come off.
  • Planning drawings get reused as building drawings; the builder prices from information that was never intended to be built from and the extras start immediately.
  • The client changes the brief after the planning submission, which means a new application rather than an amendment, and the programme slips by months.
  • Nobody is appointed to inspect, so the first time anyone checks the work against the drawings is at completion.
  • The structural engineer is engaged late, and the beam sizes force a redesign of the opening that the drawings already showed.

What drives an architect's quote, and how LokalMatch fits in

Architectural fees on a house move with the scope you buy rather than the square metres alone. A drawings-only appointment for a rear extension is a different product from a full service that runs from feasibility through planning, building control, tender and site inspection. The other variables are the condition and complexity of the existing building, whether a measured survey is needed, whether the site is listed or in a conservation area, how many design options you want to see, and whether the practice will also coordinate the structural engineer and the building control submission. Fees may be a percentage of construction cost, a lump sum per stage or an hourly rate, and the three are not comparable until you have the scope written down.

LokalMatch handles the introduction and nothing else. You describe the project once with your postcode, and architects and practices covering your area get in touch with you directly. Homeowners pay nothing to use the site; professionals pay for the requests they receive. LokalMatch does not carry out the work, does not set prices and does not vet, rank or recommend anyone — which is exactly why the ARB Register check described above is yours to do.

Architects: frequently asked questions

Is it illegal to call yourself an architect in the UK?

If you are not on the Architects Register, yes. Section 20(1) of the Architects Act 1997 prohibits practising or carrying on business under any name, style or title containing the word architect unless you are a registered person, and section 21 makes contravention an offence punishable on summary conviction by a fine not exceeding level 4 on the standard scale. The Act names three exceptions that may be used freely — naval architect, landscape architect and golf-course architect.

How do I check that someone is really an architect?

Ask for their registration number and check it against the Architects Register kept by the Architects Registration Board. ARB describes the Register as the only official list of every architect in the UK and says every registered architect has a unique registration number they should provide on request. If the name is not there, the title is being misused and ARB has a complaint route for exactly that.

Does a limited company called something-architects have to be registered?

A company cannot itself be on the Register, but section 20 lets a body corporate, firm or partnership use the word architect in its business name where the architecture work is under the control and management of a registered person who does not hold a similar position in another such business, and where every place of business doing architecture work is run by or under the regular supervision of a registered person. Ask which individual that is.

Is RIBA membership a legal requirement?

No. ARB states that it is not a membership body like RIBA or RIAS and that membership of those organisations is voluntary and not a legal requirement to practise as an architect. Being chartered is an optional professional credential on top of registration, not a substitute for it.

Do architects have to carry professional indemnity insurance?

ARB tells the public that registered architects maintain professional indemnity insurance, and it publishes separate guidance on the subject alongside the 2025 edition of the Architects Code. Ask for evidence of current cover before you appoint, and keep a copy — the cover that matters for a design error is the policy in force when the claim is made, not when the drawing was done.

Does the Architects Act apply in Scotland and Northern Ireland?

Yes. The Architects Act 1997 is UK-wide, and section 21 expressly modifies the prosecution time limits in the Magistrates' Courts Act 1980, the Magistrates' Courts (Northern Ireland) Order 1981 and the Criminal Procedure (Scotland) Act 1995 to give two years rather than six months. Planning and building control differ across the four countries, but the protected title does not.

Sources

  1. Architects Act 1997, section 20 (use of the title architect), legislation.gov.uk
  2. Architects Act 1997, section 21 (offence and penalty; two-year prosecution window), legislation.gov.uk
  3. Architects Registration Board: about ARB and the Architects Register
  4. Architects Registration Board: before hiring an architect (checking the Register, insurance, fees in writing, ARB compared with RIBA and RIAS)
  5. Architects Registration Board: the Architects Code, Standards of Conduct and Practice, 2025 edition

Written by the LokalMatch editorial team. Last reviewed 21 September 2026. How we write and check our guides

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What affects the cost of design

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Type of professional and service needed
  • Size and complexity of the project
  • Level of detail in drawings or reports
  • Number of site visits and meetings
  • Number of design revisions
  • Help with permits or contractor selection

How to compare architects before you hire

  • Match the professional to the job: an architect or engineer where the work requires one, a designer for layout and finishes, or an inspector for a condition report.
  • Ask whether they are licensed or certified for this type of work in your area, where that applies.
  • Review a portfolio or sample report that's similar to your project.
  • Get a written agreement that spells out the services, deliverables, number of revisions and how fees are charged.
  • Ask whether their drawings will be suitable for a permit application, and whether they'll help with it.

Questions to ask architects before you hire

  • Are you licensed or certified for this type of work in my area?
  • What exactly will you deliver: drawings, specifications, a report or site visits?
  • How are your fees charged: a fixed fee, hourly or based on the project cost?
  • How many rounds of revisions are included?
  • Will your drawings be ready for a permit application, and will you submit it?
  • Can I see a sample of a similar project or report?
  • Do you carry professional liability insurance?

When to call a pro for design

  • Before removing or moving a wall that may be load-bearing
  • Before buying a home, to understand its condition
  • When a permit application needs drawings

Design permits and local rules

Some design work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

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