How Much Does an Architect Cost in the UK?

Home Updated October 2026 12 min read

Quick Answer

Most homeowners in the UK pay architects between 5% and 15% of the total construction cost for a full service. On an hourly basis, expect to pay £60 to £150 per hour outside London and £90 to £200 per hour in London. A straightforward single-storey extension might cost £2,000 to £6,000 in architect fees alone, while a full new build house could see fees of £15,000 to £50,000 or more. Fixed-fee packages for planning drawings only typically start at £1,200 and can reach £4,500 for more complex projects.

On this page

How Architects Charge: The Three Main Fee Structures
Architect Hourly Rates in the UK (2026)
Percentage Fees by Project Type
Fixed Fee Packages: What You Get and What It Costs
RIBA Work Stages and How Fees Are Split
What Affects the Cost of an Architect?
Additional Costs to Budget Alongside Architect Fees
How to Get the Best Value from Your Architect
Frequently Asked Questions

Hiring an architect is one of the more significant professional costs attached to any building project, whether you are extending a Victorian terrace, converting a loft or commissioning a new build. Fees vary enormously depending on the size of the project, the level of service you need and where in the country you are based.

This guide breaks down the real numbers for 2026 so you can budget accurately, understand what you are actually paying for and know when it is worth spending more.

How Architects Charge: The Three Main Fee Structures

Before looking at specific numbers, it helps to understand how architects structure their fees. There is no single standard approach and most practices will offer one of three methods depending on the project type and their own preference.

Percentage of construction cost: The most common method for larger or more complex projects. The architect charges a set percentage of whatever the build ultimately costs. This aligns their fee with the project scope but means costs can creep if the build goes over budget.
Hourly or daily rate: Common for smaller commissions, feasibility studies, or when you only need advice at specific stages. You pay for the time spent, which can be hard to forecast but keeps things transparent for short engagements.
Fixed fee: Increasingly popular for defined scopes such as planning drawings for an extension. You agree a lump sum upfront. Good for budget certainty but only works when the brief is clear from the start.

Many architects will blend these approaches, for example charging a fixed fee for planning stage then switching to a percentage for construction stage. Always confirm the fee structure in writing before any work begins.

Architect Hourly Rates in the UK (2026)

Hourly rates reflect experience, location and whether you are dealing with a sole practitioner or a larger practice with higher overheads. Junior architects and architectural technicians sit at the lower end, while senior partners at established firms command considerably more.

Architect Type	Hourly Rate (Outside London)	Hourly Rate (London)
Architectural technician	£40 to £70	£55 to £90
Junior / Part III architect	£60 to £90	£80 to £120
Mid-level architect	£80 to £120	£110 to £160
Senior architect / director	£120 to £160	£150 to £200
Principal at a prestige practice	£160 to £250	£200 to £350

Day rates are simply the hourly rate multiplied by seven or eight hours and typically range from £350 to £900 outside London and £500 to £1,400 in London. These are most relevant if you are commissioning a feasibility study or bringing in an architect to review existing plans.

Percentage Fees by Project Type

When an architect charges a percentage of the construction cost, the percentage itself usually decreases as the project value increases. A small extension requires proportionally more design effort relative to cost than a large new build, so the percentages are higher at the smaller end.

Project Type	Typical Percentage Fee	Example Build Cost	Estimated Architect Fee
Small residential extension (under 30 sqm)	10% to 15%	£30,000 to £60,000	£3,000 to £9,000
Large residential extension (30 to 80 sqm)	8% to 12%	£60,000 to £150,000	£4,800 to £18,000
Loft conversion	8% to 14%	£35,000 to £80,000	£2,800 to £11,200
New build house (self-build)	6% to 10%	£200,000 to £500,000	£12,000 to £50,000
Commercial refurbishment	5% to 9%	£150,000 to £1,000,000	£7,500 to £90,000
Listed building / complex heritage work	12% to 20%	£50,000 to £300,000	£6,000 to £60,000

These percentages cover a full service from initial brief through to completion on site. If you only need an architect for part of the process, fees are broken down by stage (see the section below on partial services).

Fixed Fee Packages: What You Get and What It Costs

Many smaller practices and online architectural services now offer fixed fee packages aimed at homeowners who want planning drawings without committing to full project management. These can represent good value but it is important to understand exactly what is included.

Planning drawings only: Typically covers measured survey, design drawings, planning application forms and submission. Usually costs £1,200 to £3,500 for a single-storey extension and £2,500 to £5,500 for a two-storey or more complex project.
Planning plus building regulations drawings: Adds the technical detail required to satisfy building control. Adds roughly £1,000 to £2,500 to the planning-only cost depending on complexity.
Full drawings package (planning, building regs and tender pack): Also includes a schedule of works and specification to help you get comparable quotes from builders. Typically £4,000 to £9,000 for a mid-size extension.
Full project management added on top: If the architect also manages the build, monitors the contractor and certifies payments, expect to add 3% to 6% of build cost on top of the drawing fee, or an agreed monthly retainer of £500 to £1,500 per month during construction.

Online or remote architectural services advertised heavily on social media tend to start around £800 to £1,500 for basic planning drawings but vary significantly in quality. Always check the individual is RIBA registered or at minimum holds a recognised qualification before handing over any money.

RIBA Work Stages and How Fees Are Split

The Royal Institute of British Architects divides a project into eight work stages, numbered 0 to 7. When an architect provides a percentage fee, it is usually split across these stages. Knowing this helps you understand what you are commissioning at any given point and what you owe if you decide to stop partway through.

Stage 0 and 1 (Strategic definition and preparation): Feasibility, site appraisal, initial brief. Usually 5% to 10% of the total architect fee.
Stage 2 (Concept design): Early sketches, massing studies, initial layouts. Around 15% to 20% of the total fee.
Stage 3 (Spatial coordination / developed design): Planning application drawings. Around 20% of the total fee. This is often the stopping point for clients using a fixed-fee planning service.
Stage 4 (Technical design): Building regulations drawings, structural coordination, specification writing. Around 20% to 25% of the total fee.
Stage 5 (Manufacturing and construction): Site inspections, contractor queries, contract administration. Around 25% to 35% of the total fee.
Stage 6 and 7 (Handover and use): Snagging, practical completion, post-occupancy review. Around 5% to 10% of the total fee.

If you engage an architect for stages 0 to 3 only, you are typically paying 40% to 50% of what the full service fee would have been. Ask your architect to confirm the percentage allocated to each stage in your fee proposal.

What Affects the Cost of an Architect?

Several factors push architect fees up or down, and understanding them helps you have a more informed conversation when getting quotes.

Project complexity: A straightforward box extension is much quicker to design than a home with unusual geometry, restricted site access or structural challenges. Complex projects take more hours and cost proportionally more.
Location: London and the South East generally command fees 20% to 40% higher than the rest of England. Scotland, Wales and Northern Ireland tend to sit at or slightly below the English regional average.
Planning sensitivity: Projects in conservation areas, on listed buildings or in Areas of Outstanding Natural Beauty require more detailed drawings, heritage statements and often multiple rounds of pre-application advice. This adds both time and cost.
Level of service: Drawings only versus full contract administration makes a large difference to the total fee. Many self-builders save money by managing the build themselves but take on significant responsibility for coordination and quality control.
Practice size and reputation: A well-known practice with award-winning projects charges a premium. A sole practitioner working from home has lower overheads and often lower fees, but may have less capacity for large or fast-moving projects.
Revisions and scope changes: Most fixed-fee quotes include a set number of revision rounds. Going beyond these, or changing the brief significantly after design has started, usually triggers additional charges at the hourly rate.

Additional Costs to Budget Alongside Architect Fees

The architect fee is rarely the only professional cost you will pay. Most projects require several other consultants and surveys, often coordinated by the architect but billed separately.

Structural engineer: Required for most extensions and all new builds. Fees typically range from £800 to £3,000 for residential work, more for commercial projects.
Planning application fee: Paid to the local authority, not the architect. Currently £258 for a householder application in England, higher for larger or commercial projects. Fees are set to increase further in 2026.
Building regulations application: Full plans application fees vary by local authority but typically range from £500 to £1,500 for residential extensions.
Measured survey: If the architect needs to survey the existing property before design begins, this usually costs £400 to £1,500 depending on property size. Some architects include this in their fee; others charge separately.
Party wall surveyor: If your works affect a shared wall or boundary, you may need a party wall agreement. Surveyors typically charge £700 to £2,000 per neighbour affected.
Arboricultural report: Required if there are protected trees near the site. Typically £400 to £900.
Ecological survey: Required on some sites, especially for new builds or barn conversions. Costs £500 to £2,000 depending on scope.

How to Get the Best Value from Your Architect

Getting value does not mean finding the cheapest quote. It means getting the right level of service for your project at a price that reflects the work involved.

Be clear about your brief: The more clearly you can explain what you want, the less time the architect spends on exploratory work. A clear brief saves money and usually produces better results.
Get at least three quotes: Fees vary significantly between practices. Request itemised proposals so you can compare like with like, not just the headline figure.
Ask what is not included: Some quotes exclude the measured survey, planning fee, or building regulations submission. These can add hundreds or thousands if you are not expecting them.
Consider a partial service: If your project is straightforward and you are confident managing a builder yourself, paying for design and planning only (stages 0 to 3) can save a significant portion of the total fee.
Check their planning track record: Ask how many similar applications they have submitted in your local authority area and what their success rate is. Local knowledge matters, particularly in sensitive areas.
Agree a payment schedule upfront: Reputable architects will invoice by stage rather than asking for large sums upfront. Be wary of anyone asking for more than 20% to 25% before any work has been done.

Bottom Line

Architect costs in the UK in 2026 typically range from 5% to 15% of construction cost for a full service, or £60 to £200 per hour depending on location and experience. A homeowner commissioning an extension can expect to pay £2,000 to £9,000 for drawings and planning, rising to £5,000 to £20,000 or more if the architect also manages the build. The fee is rarely the place to cut corners because a good architect can save you far more than their fee by avoiding planning refusals, catching structural issues early and keeping contractors honest on site.

Frequently Asked Questions

Do I legally need an architect for an extension or loft conversion?

No. There is no legal requirement to use a fully qualified architect for most residential work. You can use an architectural technician, a draughtsperson or a design-and-build contractor instead. However, for listed buildings, complex planning applications or anything requiring structural creativity, a registered architect is usually worth the additional cost.

What is the difference between an architect and an architectural technician?

A registered architect holds a full ARB (Architects Registration Board) qualification after seven years of study and professional experience. An architectural technician typically holds an HNC, HND or degree in architectural technology and focuses on the technical and production drawing side. Technicians often charge 20% to 40% less than architects and are well suited to straightforward extensions and alterations.

How much does an architect charge for planning drawings only?

For a standard single-storey residential extension, planning drawings only typically cost £1,200 to £3,500 as a fixed fee. A two-storey extension or more complex project usually sits at £2,500 to £5,500. Online services advertise lower prices but quality and communication can vary, so always check credentials before committing.

Is VAT charged on architect fees?

Yes. Architect fees are subject to VAT at 20%. When comparing quotes, always check whether the figures quoted are inclusive or exclusive of VAT. A fee quoted as £3,000 plus VAT becomes £3,600 in total. For new build residential projects, some construction costs are zero-rated for VAT but the architect fee itself remains standard-rated.

How long does an architect take to produce planning drawings?

For a typical residential extension, expect four to eight weeks from initial meeting to submitting a planning application. More complex projects, or those requiring pre-application discussions with the local authority, can take three to six months before submission. Once submitted, the local authority has eight weeks to decide on a standard householder application, though this can extend to thirteen weeks for larger schemes.

Can I use an architect for just a feasibility study before committing to a full project?

Yes, and this is often sensible for larger or riskier projects. A feasibility study typically costs £500 to £2,500 depending on complexity and will give you a realistic picture of what is possible on your site, likely build costs and any planning constraints. The fee is usually credited against the full project fee if you proceed with the same practice.

Are architect fees negotiable?

To a degree. Fixed-fee packages have less room for negotiation than percentage-based commissions. However, you can often negotiate the scope rather than the rate, for example agreeing that you will manage certain aspects yourself to reduce the hours billed. Practices that are hungry for work or that want a particular project in their portfolio may also be more flexible on fee. Always get any agreed reduction confirmed in writing.

What is a typical architect fee for a new build house in the UK?

For a self-build new build house with a construction cost of around £300,000, a full architect service (stages 0 to 7) would typically cost £18,000 to £30,000, representing 6% to 10% of build cost. If you use the architect for design and planning only and manage the build yourself, expect to pay £8,000 to £15,000. These figures exclude VAT and the cost of other consultants such as a structural engineer.