How to write a website brief that is clear, detailed, and actually useful

A website project without a clear brief is one of the most reliable ways to waste time, money, and goodwill on both sides of the table. Agencies end up guessing at what you need. You end up frustrated with results that miss the mark. Revisions pile up and timelines stretch.

A well-written website brief solves all of this before the project even starts. It gives an agency everything they need to understand your business, your goals, your audience, and your requirements — so that the proposal they send back, and the website they ultimately build, is shaped around what you actually need. This guide walks you through every section of a strong website design brief, what to include, and the questions to answer that most people leave out.

What is a website brief and why does it matter?

A website brief (sometimes called a web design brief or RFP — request for proposal) is a document you prepare before approaching a web agency or freelance developer. It outlines what you need, why you need it, who it is for, and what success looks like. Agencies use it to understand the scope of the work and put together an accurate proposal. You use it to stay in control of the project from the start.

Without a brief, the proposal process becomes inconsistent. Different agencies will make different assumptions, quote for different things, and arrive at wildly different prices — not because the work is priced differently, but because they are estimating entirely different projects. A clear brief levels the playing field and means every quote you receive is based on the same understanding of what you need.

The other thing a brief does is force clarity before the project starts rather than during it. Most website projects that go off-track do so because requirements were not pinned down at the beginning. Scope creep — the gradual expansion of a project beyond what was originally agreed — is almost always the result of an unclear brief. Investing an hour or two in writing a good one saves far more than that later.

What to include in a website brief: the essential sections

A good website brief does not need to be a lengthy document. What it needs to be is complete and specific. Here is what every section should cover.

1. Your business: who you are and what you do

Start with a concise introduction to your business. The agency needs a genuine understanding of your company — not just what sector you are in, but what you actually do, who your customers are, and what makes your offering different. If your business has gone through a recent rebrand, change of direction, or significant development, mention it here.

This section should also give an honest picture of where your business sits in its market. You do not need to write an essay — a few clear paragraphs that give the agency a real sense of your company, your customers, and your competitive context is all that is needed.

2. Why you need a new website

Be direct about what is wrong with your current website, or why you are building one from scratch. If the current site is difficult to update, does not reflect your brand, is not generating enquiries, or fails on mobile, say so. If you are a new business with no existing site, explain what you need the website to achieve and the impression you want it to make.

Agencies find it far easier to solve a clearly stated problem than to guess at one. If you know that your current site has a high bounce rate, that customers regularly comment on finding it hard to navigate, or that it was built on a platform you have outgrown, these are all useful and specific things to include.

3. Goals and objectives

What do you want the new website to achieve? Be as specific as you can. Generic aims like ‘a better website’ or ‘more traffic’ are not goals — they are aspirations. Goals should be measurable and tied to your business outcomes.

Examples of useful goals include increasing the number of enquiries generated through the site, reducing the volume of customer service calls by making key information easier to find, improving the conversion rate of visitors to leads, or launching a new product or service to a new audience. Include a mix of hard targets where you have them and directional priorities where you do not.

4. Your target audience

Describe the people your website needs to work for. Who are your primary customers? What do they need to find when they visit? What are the typical reasons they come to your site, and what do you want them to do when they get there? If you have customer personas, include them or summarise the relevant details.

Understanding your audience is one of the most important inputs into web design decisions — from navigation structure to page layout to the calls to action that appear throughout the site. An agency cannot design for your users without understanding who those users are.

5. Your competitors and the sites you admire

List three to five competitors and give the agency a sense of their online presence. What do they do well? Where do they fall short? What does their website communicate about their positioning? This context helps an agency understand the landscape your site needs to operate in.

Also include a list of websites you admire — these do not need to be competitors or even in your industry. If there are sites whose layout, tone, navigation, or visual approach resonates with what you are looking for, sharing them is one of the most effective ways to communicate aesthetic and functional preferences without needing to describe them in technical terms.

6. Technical requirements and functionality

This is often the section where briefs become vague — and where the consequences of vagueness are most expensive. Be specific about what you need the website to do.

Questions to answer in this section include: which content management system do you want to use (or are you open to a recommendation)? Will the site need e-commerce functionality? Do you need it to integrate with any other systems — a CRM, a booking platform, an email marketing tool, an API? Are there accessibility requirements (WCAG 2.1 or 2.2 compliance is increasingly expected for public-facing sites)? Will there be a blog or resource section that your team updates regularly? Do you need multi-language support?

If you are not sure about some of these, say so and ask for a recommendation. A good agency will advise you. It is also worth noting any specific integrations you currently use — if your business runs on HubSpot, Salesforce, or a particular booking or payment system, that needs to be in the brief so the agency can account for it. The same applies if you are interested in AI integrations or chatbot functionality — these are increasingly common requirements and are best raised at brief stage rather than mid-project.

7. Proposed sitemap and content

Outline the pages you expect the website to have. A rough sitemap — even a simple bullet-point list of the main sections and their sub-pages — gives the agency a sense of the scale and complexity of the project and helps them estimate development time accurately.

Be clear about who is responsible for the content. Will you be providing all the copy, images, and other assets, or do you need the agency to help produce them? Many website projects are delayed because content is not ready when development is. Being explicit about this in the brief helps both sides plan properly.

8. Budget

Many briefs leave this out, and that is a mistake. Sharing your budget — even as a range — means agencies can tailor their proposals to what is actually achievable rather than proposing a solution you cannot afford. It also means you are less likely to receive five wildly different quotes that are difficult to compare because each one is scoping a different level of project.

You do not need to state an exact figure. A range such as £5,000 to £10,000, or an indication that you are looking for a mid-range rather than entry-level or enterprise solution, is enough to guide the agency in the right direction. If you have separate budgets for the build and for ongoing hosting or maintenance, include those too.

9. Timeline and key dates

State when you need the website to be live, and why. If the launch date is tied to an event, a campaign, a product launch, or the start of a busy trading period, say so — it helps the agency understand how firm the date is and what the consequences of slipping it might be. If you have flexibility, that is also worth stating.

A realistic timeline for a new website build, depending on scope and complexity, is typically eight to sixteen weeks from kick-off to launch. If your deadline is tighter than that, be upfront — some agencies can accelerate projects, but this usually has cost implications.

10. SEO and analytics requirements

Your website brief should address what happens to your search engine visibility during and after the build. If you have an existing website with established rankings, a poorly managed migration can cost you significant organic traffic. Ask agencies how they handle URL structures, 301 redirects, and SEO during a site rebuild.

Include any requirements around analytics setup. If you need Google Analytics 4, Google Tag Manager, heatmapping tools, or conversion tracking setting up alongside the build, this needs to be in the brief. It is far cheaper and easier to implement these correctly from the start than to retrofit them later. If SEO is a priority for your business, mention it explicitly and consider whether you need ongoing SEO support alongside the website project.

11. Who is making the decisions

Name the project owner — the person who will be the primary point of contact, make decisions, and sign off on work. If there are other stakeholders who will need to approve designs or content, mention them. Websites built by committee tend to take longer and end up less coherent. If there are multiple decision-makers, clarifying the approval process upfront avoids delays later.

Common mistakes in website briefs — and how to avoid them

Being vague about goals

‘We want a better website’ is not a goal. A goal is ‘we want to reduce the number of customer service calls by making pricing information clearer on the site’. The more specific your goals, the easier it is to design and measure against them.

Leaving out the budget

Omitting your budget does not protect you from being overcharged — it just means you receive proposals that may not be aligned with what you can afford. A budget range gives agencies permission to design an appropriate solution rather than pitching in the dark.

Not mentioning existing integrations

If your business already uses specific tools — a CRM, an email platform, a booking system, a payment provider — and these need to connect to the new website, they must be in the brief. Discovering integration requirements mid-project is one of the most common causes of cost overruns and timeline delays.

Skipping the audience section

The website is not for you — it is for your customers. An agency that does not understand your audience cannot design for them effectively. This section is worth taking seriously even if it feels obvious to you.

Not addressing content responsibility

Many website projects stall because the client has not prepared their content — copy, images, case studies, team bios — in time for the build to proceed. Be clear in your brief about who is providing what, and by when.

Quick-reference checklist: what your website brief should cover

• Who you are and what your business does
• Why you need a new website — what is wrong with the current one
• Specific, measurable goals for the new site
• Your target audience and their needs
• Competitor websites and sites you admire
• Technical requirements: CMS, integrations, e-commerce, accessibility
• Proposed sitemap and who is providing the content
• Budget (a range is fine)
• Timeline and any hard deadlines
• SEO and analytics requirements
• Who will be making decisions and signing off work

A good starting point if you want a structured format to work from is the Digital Culture Network’s website brief template, which provides a downloadable framework you can adapt for your own project.

What happens after you send your website brief

A well-written brief prompts a good agency to come back to you with intelligent questions rather than generic proposals. You should expect the agency to query anything that needs clarification, push back if goals or budgets seem misaligned, and demonstrate in their proposal that they have genuinely read and understood what you are trying to achieve.

At Webphoria, we review every brief carefully before responding. We will tell you honestly if your budget and timeline are realistic for the scope you have described, and we will ask for more detail where we need it. Our proposals are built around the specific requirements in your brief — not repurposed from a template. If you are planning a web project and want to discuss your requirements before writing a brief, we are happy to talk it through with you first.

The brief is the foundation of everything that follows. Get it right, and the project has every chance of running smoothly, landing on time, and delivering a website that genuinely works for your business.