How much does an architect cost?
Whether you’re adding a home extension, converting a house, or undertaking a commercial build, understanding architect fees is key. This guide breaks down exactly how much architects charge in 2023/2024 for all types of projects. Architect costs can vary greatly depending on the size and scope of your construction project. By learning how architects calculate their fees and what factors impact pricing, you’ll be better prepared when hiring and budgeting for your build.
Calculating Architect Fees?
Architect fees are typically calculated as a percentage of the total construction cost, ranging from 5% to 25% depending on the project. For residential, fees often fall between 10-15%. Commercial is usually 8-12%.
While a percentage of construction cost is common, architects may also charge hourly until the total cost is determined. A retainer upfront is typical to begin work. Some offer a fixed lump sum, but scope changes can mean additional fees.

Key Factors Impacting Architect Costs:
Several factors impact how much architects cost:
- Type of project – new build vs extension/renovation
- Size and complexity
- Location – standards and regulations differ
- Level of detail required – more design time means higher fees
Here’s a breakdown of typical architect fees by project type:
House Extensions – 12-14% of construction cost Refurbishments – 12-14%
Self Builds – Around 8% Housing Developments – 7.5-9.5% Commercial Extensions – 8-15% Commercial Refurbishments – 8-12% Commercial New Builds – 5-15%
Find the Best Architects Near You
Find the best deal by comparing architect fees near you, and nationwide
Hidden Fees to Budget For Beyond the architect fees, other common hidden costs include:
- Planning permission
- Surveys – noise, acoustic, etc.
- Structural changes
- Building regulations compliance
- Conservation/listed building requirements
- Contingency budget
An architect can help anticipate these, so there are no surprises. Plan for hidden costs to add around 25% on top of construction costs. The ARB provides guidance on architect services and what to expect from your architect, learn more here.
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Get LeadsHow to Negotiate Your Architect’s Fees
When comparing bids, focus negotiations on profit margins, not reasonable time requirements. Ask for a breakdown of rates rather than just a total figure.
While overheads are fixed, the profit margin has more flexibility. Be careful not to compromise on quality/dedication though.
Using a Local Architect
Benefits of Hiring a Local Architect
- Site visits throughout the project
- Expertise on local regulations
- Relationships with quality local tradespeople
- Referrals from satisfied locals
Take the first step and find a local architect near you now on www.comparearchitects.co.uk