Architect Fees for Extension – How Much to Prepare

Architects play a big role in construction project design, approvals, and execution. In return, they charge a percentage of the total cost of the project. Although the charges might vary based on the project, most architects charge within the same general price range. If you are looking to know the architect fees for extension, it is recommended to compare prices from the best architectural companies in your area. But it is important to have an idea of what percentage they charge and how to go about your research. Luckily, this article is written for that purpose.

Types of Architect Fees for Extension

Extension, unlike a fresh construction project, involves the changing of an existing design to accommodate a newly added structure on the side. However, loft extensions are also common these days. Architects may charge differently for the project depending on their way of doing business. Here are the common approaches to the charges.

·       Percentage charges – This is the most common way to determine the architect fees for extension. Most reputable companies charge 12% to 20% of the total cost of the materials depending on the complexity of the extension project. The good thing about charging by percentage is that both parties will be content when they settle on a deal.

·       Charging by the hour – Some architectural companies charge by the hour of work. Although it is not a common approach, it is suitable when a project does not need a lot of work hours from the architect. If you follow this approach, the architect fees for extension per hour might range from 50 pounds to 100 pounds per hour depending on the complexity of the project.

·       Lump sum charges – This is the least common option to determine the architect fees for extension. It is hardly accurate although some companies and clients are happy to use it. The good thing is that you can negotiate a fee depending on the work ahead.

How to Save on Architect Fees for Extension

If you would like to save on architect fees for extension, the first thing is to work with a professional company. They have no hidden fees and produce high-quality work that does not require repetitions.

But you can still compare fees for different architectural companies to determine one that will work best for you. Do not be tempted to go for the cheapest option unless you are sure of the services they offer to avoid low-quality and compromised jobs.

Sitting at the negotiating table to determine the architect fees for extension is a great way to save. Always ask the company to consider giving a discount or waiving some fee. You are in a better position to negotiate if you have been a customer with the company before, for instance, if they did the main house.


It is easy to determine the architect fees for extension. By now, you already know how much to prepare and even how to lower the costs. The insights we have shared above will help you make the right decisions and to have a successful extension of your house or any other structure.

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