If you’re starting a new website project, knowing how to write a website design brief properly can save you weeks of back and forth. A good brief gives any web design agency, including us, everything we need to understand your business, your goals and what success actually looks like for your new site. Without one, agencies are left guessing, which can mean inaccurate quotes, vague proposals and more revisions than necessary once the project is underway. This guide walks you through exactly what to include, so you can create a brief that gets you accurate quotes and a website that does what you actually need it to do.
What Is a Website Design Brief?
A website design brief is a short document that explains what your business does, who your website is for, and what you want the finished site to achieve. It’s the starting point most that web design agencies work from when they put together a quote, a project plan and a proposed approach.
Think of it as a briefing pack rather than any technical specification. You don’t need to know exactly how many pages your site will have or which plugins it needs, that’s the agency’s job to work out. What you do need to provide is context about your business, your customers, your competitors and what you want the website to do for you. The more useful context you can give, the less time gets spent on discovery calls chasing basic information, and the more accurate the resulting proposal will be.
Why Writing a Proper Brief Is Worth the Time
A clear brief means agencies can quote accurately from the start, which means fewer surprises on price and a project that’s less likely to drift off course once work begins. Skipping it, or sending a one line email, can often cost you time later down the line.
Every agency has had an enquiry that says “just make it look modern” and nothing else. It’s an understandable shortcut, but it leaves the agency guessing, and guesses are expensive to correct once a design is built.
A properly written brief does two things well. First, it gives every agency you approach the same starting information, so you get quotes that are genuinely comparable rather than quotes based on very different assumptions. Second, it becomes a reference point throughout the project, something you and your agency can return to if the scope starts drifting in a direction you didn’t agree to.
Who Should Write It?
In most cases, you should write the first draft yourself, since nobody understands your business, customers and goals better than you do. A good agency will then help you refine it during the discovery phase.
You don’t need design or technical experience to write a useful brief, what matters is business knowledge. Being clear on what you sell, who buys it, what’s worked before and what hasn’t is all critical information. If you’re working with several stakeholders, it can often be worth getting one person to own the document and gather input from the rest, rather than letting it become a group email thread. That keeps the brief consistent and stops conflicting instructions reaching your agency.
Step by Step Guide on How to Write a Website Design Brief
Work through the sections below in order and you’ll end up with a brief that covers everything a web design agency needs to give you an accurate quote.
Start With Your Business Background
Open your brief with a short overview of your business including what you do, who you serve, and how long you’ve been operating. This gives context to everything that follows.
Include your company name, a paragraph or two summarising what you do, your main products or services, and anything that makes you different from competitors. If you’ve got existing brand guidelines, mention them here. If you’re building a completely new brand alongside the website, say so, since that changes the scope of the project considerably.
Define Your Project Goals
Explain what you want the new website to achieve, not just what you want it to look like. Common goals include generating more enquiries, supporting online sales, or replacing an outdated site that’s no longer doing its job.
Be specific where you can. “More enquiries” is a start, but “more enquiries from businesses in the £50,000 to £250,000 project range” gives your agency something to actually design around. If you’re replacing an existing website, explain what isn’t working about it as that piece of information often shapes the whole approach to the new design.
Describe Your Target Audience
Tell your agency who the website needs to speak to. Are you selling to other businesses, consumers, or both? What do they care about when they’re deciding who to buy from?
You don’t need formal customer personas, though they help if you already have them. A few sentences about your typical customer, what problem they’re trying to solve, and what stops them buying, is often enough. If you serve more than one distinct audience, for example homeowners and trade customers, say so and note whether the website needs to speak to both differently.
Take a Look at Your Competitors
List two or three direct competitors and, if you can, one or two businesses outside your industry whose websites you admire. This gives your agency a quick sense of your market and your taste.
Note what you like and dislike about each site. You don’t need to write an essay, a few honest observations are more useful than none at all. This section also helps your agency spot opportunities to make your new site stand out from what everyone else in your industry is already doing.
Outline Your Content and Functionality Needs
List the pages and features you know you’ll need, and be honest about who’s writing the content. If you need product listings, an online shop, a booking system or integration with software you already use, this is where it belongs.
Content is one of the most common things left out of a website brief, and it’s one of the biggest causes of delay once a project is underway. If you want your agency to write the copy, say so here, since that changes both cost and timeline.
If you already know you want your site built on WordPress, our guide to WordPress development explains what that typically involves and what decisions it affects early on. If an online shop is part of the plan, our ecommerce website development service covers the platform, product setup and payment side of things, so it’s worth flagging early whether that applies to you.
Sketch a Simple Sitemap
A rough list of the pages you think you’ll need, even just a bullet list, helps your agency understand the size and structure of the project before they quote.
You don’t need to get this right. Agencies expect the sitemap to change once they’ve reviewed your goals and done some research of their own. A good agency will guide you on the types of pages they think will be beneficial. What matters is giving a realistic sense of scale, five pages is a very different project to thirty.
Note Your Design Preferences and Brand Guidelines
Share any existing brand assets, such as a logo, colour palette or style guide, and mention websites whose look and feel you like. If you don’t have formal branding yet, say so.
It helps to be specific about what you like about the reference sites you mention. Is it the layout, the colours, the tone of the writing, or something else? Vague references like “modern and clean” mean different things to different designers, so a sentence explaining why you like a particular example goes a long way.
Set Out Accessibility and Legal Requirements
Mention whether your site needs to meet accessibility standards, and flag anything relevant around data protection, especially if you’ll be collecting customer information through forms or an online shop.
Most UK small businesses aren’t legally required to meet the same accessibility standards as public sector websites, but building with the WCAG guidelines in mind from the start is good practice and widens who can actually use your site. GOV.UK’s introduction to accessibility is a useful plain-English starting point if you’re not familiar with the basics.
If your website needs to collect personal data, whether that’s through a contact form, a newsletter sign-up or online orders, your agency needs to know so cookie consent, privacy notices and data handling are built in properly from the start. The ICO’s GDPR guide for small businesses is a useful free resource if you want to understand your obligations before you brief your agency.
Agree Your Budget and Timeline
Give a realistic budget range rather than leaving it blank, and mention any fixed deadlines, such as an event or product launch, that the project needs to work around.
Agencies aren’t asking for a budget to catch you out, it genuinely changes what’s realistic to recommend. A vague budget usually means a vague quote, or a quote that assumes far more than you’re planning to spend. If you have specific goals in mind, consider this when thinking about your budget as, sometimes, compromises need to be made, for example, increasing your online sales by £50,000 per month would not be achievable with a £5,000 redesign.
If you want a sense of what website design typically costs in the UK before you set a figure, our complete guide to website design costs breaks it down by project size, and our piece on how long it takes to build a website covers realistic timelines from discovery to launch.
Decide How You’ll Measure Success
Note how you’ll know the website has done its job, whether that’s a target number of enquiries, a rise in online sales, or simply a lower bounce rate than your current site.
This doesn’t need to be complicated. Even a simple statement like “success means at least ten qualified enquiries a month within six months of launch” gives your agency something concrete to design and measure against, rather than a subjective judgement of whether the site looks good.
Mention Hosting and Ongoing Support
Say whether you need your agency to handle hosting and maintenance after launch, or whether you already have that covered elsewhere.
A lot of businesses assume hosting is included by default, and it sometimes isn’t. Flagging this early avoids an awkward conversation once the site is already built. If you’re not sure what you need, it’s worth asking your agency to explain the options rather than guessing.
A Simple Structure You Can Use
You don’t need special software or a downloadable template to write a good brief. A plain document with the headings below, answered honestly, will do the job just as well.
- Business background
- Project goals
- Target audience
- Competitors
- Content and functionality
- Sitemap
- Design preferences and brand guidelines
- Accessibility and legal requirements
- Budget and timeline
- Success metrics
- Hosting and support
Copy those headings into a blank document, write two or three honest sentences under each one, and you’ll have a brief that puts you ahead of most of the enquiries an agency receives. It doesn’t need to be polished. It needs to be clear. Once it’s finished, you’ll be ready to approach a web design agency with confidence, rather than a blank page and a vague idea.
Common Mistakes to Avoid
The most common brief writing mistakes are being too vague, leaving out a budget entirely, and forgetting to mention who’s responsible for content. All three lead to the same problem, a quote that doesn’t match what you actually needed.
A vague budget usually results in a vague quote, or one that assumes far more than you’re planning to spend. And if you don’t mention who’s writing the content, don’t be surprised if the quote you get doesn’t include it. Copywriting is a specific skill, and most agencies price it separately unless you ask.
Website Design Brief FAQs
What is a design brief?
A design brief is a document that explains what a project needs to achieve and who it’s for, before any design work begins. For a website, that means covering your business, your audience, your goals and what you want the finished site to do. Agencies use it to understand the project well enough to quote accurately and start planning an approach, rather than working from assumptions. It’s less about technical detail and more about giving useful context, since the agency will usually work through the finer technical points with you separately during discovery.
How do you write a design brief?
Start with your business background and what you’re trying to achieve, then work through your target audience, competitors, content needs, features, budget and timeline in turn. You don’t need special formatting or software, a plain document with clear headings works fine. The goal is to give an honest, specific answer under each heading rather than a vague one. If you’re not sure about a particular section, say so rather than leaving it blank. A good agency will help you work it out during discovery rather than expecting a finished document from day one.
How long should a website brief be?
Most useful website briefs run to two or three pages, sometimes a little longer if the project is complex. Length matters less than clarity. A short, specific brief is far more useful to an agency than a long one padded with generic statements. If you’re struggling to fill a page, that’s often a sign you need to think through your goals a little further, rather than a sign you need to add more words.
Who should write a website brief?
Whoever knows the business best should write the first draft, usually the business owner or marketing manager. If several people need to contribute, it’s worth having one person collect everyone’s input and write the final version, rather than sending an agency several separate opinions. Your agency will typically refine the brief with you during an initial discovery conversation, so it doesn’t need to be perfect before you send it.
Do I need a brief if I’m just redesigning my website?
Yes, if anything a redesign brief needs slightly more detail than one for a brand new site. Alongside the usual sections, explain what’s not working about your current website, what you’d like to keep, and any data you have on how the existing site performs. That context helps your agency avoid repeating the same mistakes in the new design.
What happens if I don’t have all the answers yet?
That’s completely normal, and it’s one of the reasons a good web design agency runs a discovery phase before design work starts. Fill in what you can and be honest about the gaps rather than guessing. A brief doesn’t need to be finished to be useful, it needs to give your agency enough to start the right conversations.
Ready to Start Your Website Project?
Once your brief is in reasonable shape, the next step is finding the right agency to build with. At Yellow Circle, we start every website project with a proper discovery conversation, using your brief as the starting point rather than the finished word. If you’d like to talk through your project, get in touch with our web design team and we’ll help turn your brief into a website that actually delivers on it.
