Finding the right architect is one of the most important steps in any building project. Whether you’re planning a home extension, loft conversion, renovation, or new build, understanding architect fees can help you budget more accurately and avoid unexpected expenses. In the UK, architect costs can vary widely depending on the size and type of your project, the level of service you need, and the architect’s experience. Many homeowners are unsure about how architects charge, what’s included in their fees, and how to compare quotes fairly. Our well researched content will give you a clear breakdown of how much does an architect cost in the UK?, explain the different stages of fees, highlight real examples for various project types, and help you make an informed decision that adds value to your investment. By the end of this article, you’ll have a solid understanding of average architect costs, related expenses like planning permission and building regulations, and how to hire a qualified professional like Formi Architecture to deliver your project successfully.
Architect Fees in the UK – An Overview for 2025
Architect fees in the UK generally fall into three main pricing structures: percentage of the construction cost, fixed fees, or hourly rates. In 2025, the average percentage fee ranges between 5% and 12% of the total build cost, depending on the scale and complexity of the project. For smaller projects such as home extensions or loft conversions, some architects may offer fixed fees starting from around £1,500 to £4,000, while larger projects like new builds can easily exceed £10,000 in professional charges. Hourly rates are also common for smaller tasks or consultations, averaging between £75 and £150 per hour across most regions, with London rates at the higher end of this scale. It’s important to remember that these figures can vary based on factors such as the architect’s reputation, their RIBA accreditation, and whether you are working with a traditional practice or an online architecture service. Understanding these options early will help you choose the fee structure that best suits your project and budget.
How Much Do Architects Charge at Different Project Stages?
Architect services are typically divided into stages, with fees allocated according to the work required at each point. This staged approach helps you budget more accurately and allows you to pay for the services you need, rather than committing to the full package from the start.
Initial Consultation & Feasibility Study
The initial consultation is often the first step, where the architect visits your property, discusses your goals, and gives an overview of potential options. In 2025, fees for this stage can range from £150 to £500 for a basic consultation, with more detailed feasibility studies costing between £500 and £1,500. The feasibility study assesses site conditions, local planning policies, and possible design solutions, which can save you money by identifying challenges early.
Concept Design & Planning Drawings
This stage includes developing initial design concepts and producing drawings that help visualise your project. Fees typically range from £1,000 to £4,000 for standard home projects, depending on the scale. Clear drawings are essential for understanding the design before applying for planning permission.
Planning Application & Submission
Architects can prepare and submit planning applications to the local authority on your behalf. This often costs between £1,000 and £3,000, not including the council’s application fee, which usually ranges from £200 to £500.
Building Regulations & Technical Drawings
Technical drawings are detailed plans that ensure your project meets UK building regulations. Costs can range from £1,500 to £5,000, depending on the size of the project. These drawings are crucial for contractors and building control officers.
Tender Process & Contractor Selection
If you need help selecting a contractor, your architect can prepare tender documents, review bids, and recommend suitable builders. Expect to pay around £1,000 to £2,500 for this stage.
Construction Monitoring & Site Visits
Site visits during construction help ensure that the build is progressing as planned. Fees can be charged as a lump sum or per visit, typically £250 to £500 per inspection.
Full Project Management Services
A full-service architect will oversee the entire process from concept to completion. In 2025, this can cost between 10% and 15% of the total build cost but can save you significant time and reduce the risk of costly mistakes.
Real UK Examples of Architect Costs
Real-world examples can help you better understand the potential costs for your project type.
Architect Fees for House Extensions
A standard single-storey extension in the UK might cost £30,000 to £50,000 to build, with architect fees ranging from £2,000 to £6,000 depending on services included.
Loft Conversion Architect Costs
For a loft conversion costing around £25,000 to £40,000, expect architect fees between £1,500 and £5,000. This often includes planning drawings, building regulations, and structural coordination.
Renovation & Interior Remodelling Fees
Renovations vary widely, but for a £60,000 remodel, you might pay between £4,000 and £8,000 in architect fees, especially if significant structural changes are involved.
New Build Homes – Architect Pricing
For a new build costing £200,000 or more, architects often charge between £15,000 and £25,000 for full services, including project management.
Flats & Multi-Unit Developments
For multi-unit projects, fees are often calculated per unit or as a percentage of total construction cost, typically 6% to 10%.
What Affects the Cost of an Architect?
Several factors influence how much an architect charges. Project scope is a key driver, larger, more detailed designs require more hours of work. Location also plays a role, as architects in London and the South East often have higher rates than those in other regions. Accreditation is another factor; RIBA or ARB-registered architects may charge more, but this can offer peace of mind about their qualifications. The fee structure, whether percentage-based, fixed, or hourly, also impacts the total cost. Lastly, the type of service provider matters, with online architects often offering lower prices than traditional practices, though sometimes with less personalised support.
Hidden Architect Costs You Need to Know
Architect quotes may not always list every expense upfront. Some services are considered extras and can increase your overall cost. Asking for a clear and detailed breakdown at the start will help avoid surprises later in your project.
Extra Fees in Traditional Practices
Traditional architecture firms sometimes charge extra for work outside the agreed scope. This could include additional site visits, revising designs after approval, or preparing new documents if your plans change. These costs can add up quickly if not agreed on in advance.
Additional Charges from Online Services
Online architects may offer lower initial prices, but their packages often exclude important services like detailed building regulations drawings or in-person site inspections. You might need to pay more later to cover these essentials.
Risks & Costs of Using Unqualified Designers
Choosing an unqualified designer can lead to serious problems. You risk having your planning application refused or your build failing to meet UK regulations. Fixing these issues often costs more than hiring a qualified architect from the start.
Architect Hourly Rates vs Fixed Fees – Which Works Best?
Hourly rates provide flexibility for smaller projects or consultations, while fixed fees give more cost certainty. In the UK, architects typically charge £75–£150 per hour. Fixed fees can work better for well-defined projects, while hourly rates may suit early-stage advice or feasibility work.
Planning Permission, Building Regulations & Other Related Costs
Planning permission fees are set by your local council and generally range from £200 to £500. Building regulation approvals may cost an additional £500 to £1,000. You may also need a structural engineer, whose fees can range from £500 to £2,000 depending on scope.
How to Check You’re Hiring a Qualified Architect
You can confirm your architect’s qualifications by checking the Architects Registration Board (ARB) and Royal Institute of British Architects (RIBA) directories. This ensures they meet professional standards and legal requirements.
How to Agree on a Fee Structure with Your Architect
Clear communication is key. Ask for a written fee proposal that outlines what’s included, payment schedules, and how extra charges will be handled.
How Much Value Can an Architect Add to Your Project?
A skilled architect can improve your home’s design, increase its market value, and boost your chances of planning approval. Well-designed projects often achieve higher resale prices and deliver better functionality.
Free Architect Cost Calculator
Using an online cost calculator can help you get an early estimate before speaking to architects. Some UK architecture firms offer this as a free tool to help you plan.
Key Takeaways – Architect Fees in the UK 2025
Architect fees in 2025 vary based on the project type, size, location, and service level. Breaking costs into clear stages helps you budget better and see what is included. Always check your architect’s qualifications to ensure they are RIBA or ARB registered. Agreeing on fees in writing reduces the chance of disputes. A skilled architect can increase your property’s value, improve design quality, and make your build process smoother.
Disclaimer: The architectural fees and cost ranges provided in this guide are for general information purposes only. Actual fees can vary greatly depending on the architect or firm you choose, the scope and complexity of your project, location, and the level of service required. Always request a detailed written quote from your chosen professional before committing to any work.
