How to Write an Architect Brief for Your Home Project

The first meeting with an architect usually lasts about ninety minutes. In my experience, clients who arrive with nothing but a Pinterest board spend sixty of those minutes answering questions they could have answered at home, and leave with a fee proposal based on guesses. Clients who arrive with two pages of plain notes leave with a proposal that actually matches the job.

Knowing how to write an architect brief is the cheapest design decision you will ever make. It costs an evening, not a fee, and it shapes every drawing that follows. This guide walks through what a good brief contains, what to leave out, and the one piece of popular advice that tends to backfire.

What an Architect Brief Is For

A brief is a written description of what you need from a building project, before anyone draws a line. It is not a design. It is the problem the design has to solve.

Architects use it in three ways. First, to decide if the project suits their practice and price it properly. Second, as a checklist during concept design, so nothing important is forgotten. Third, as a reference point later, when a planning officer or contractor suggests a change and everyone needs to remember why a decision was made.

A good brief for a house extension or a small renovation fits on two to four pages. Longer is not better. A twelve page document full of photographs often hides the three things that actually matter.

Start With How You Live, Not What You Want Built

Most people open a brief with a solution: "a kitchen extension with bifold doors and a roof lantern". That skips the useful part. Write down the problems first, and let the architect suggest the form.

Useful questions to answer in plain sentences:

• Who lives in the house now, and who might in ten years? Children grow, parents move in, people start working from home.
• What does a normal weekday morning look like? Where do people collide?
• Which rooms do you avoid, and why? Too dark, too cold, too far from the kitchen?
• Where do bikes, shoes, laundry and recycling actually end up?
• How do you entertain, if at all? Six friends for dinner or forty for a birthday?

An architect who reads "the back room is dark until noon and nobody sits in it" can propose a solution you had not considered, such as moving the living space to the other side of the house. That kind of insight depends on orientation, which is explained further in why building orientation decides a home's comfort.

The Room List and Rough Sizes

After the narrative, add a simple schedule of spaces. You do not need exact areas. Approximate sizes and the relationships between rooms are enough.

The notes column is the most valuable part. "Used about ten nights a year" tells the architect a guest room could double as something else. If you are unsure how sizes translate into real rooms, reading a few architectural floor plans of similar homes helps you calibrate.

Budget, Timing and the Numbers People Hide

Many clients leave the budget out, worried that the architect will simply spend all of it. That is a mistake. Without a number, the architect either designs blind or designs to a figure they invent, and you only discover the gap when a contractor prices the drawings.

State a total figure and say clearly what it includes. Construction only? Fees, surveys and planning costs too? Furniture and kitchen units? A useful rule in UK residential work is to hold back ten to fifteen percent of the construction cost as contingency, so write that down as well.

A clear line might read: "Total available £180,000, including fees and VAT, excluding furniture. We would rather build less floor area than go over." That single sentence tells the architect your ceiling and your priority, and it saves weeks of redesign when the first cost estimate arrives.

Add your timing constraints: a baby due in spring, a lease ending, a school term. Planning permission alone can take eight weeks or longer, so an architect needs to know early if a date is fixed.

Why a Mood Board Can Work Against You

Popular advice says to gather dozens of inspiration images before the first meeting. I would push back on that. A stack of glossy photographs tends to fix the conversation on finishes and styles before the plan is solved. Clients fall for a particular glazed corner or a polished concrete floor, and the design gets bent around a picture instead of around the way they live.

If you include images, keep it to five or six, and write one line under each explaining what you like. "The light falling across the table" is useful. "This kitchen" is not. Often the architect discovers that what you love in three different photos is the same thing: a low window seat, or a view through to the garden.

What to Leave Out of the Brief

A brief should not try to be a technical specification. Leave out structural solutions, door suppliers and specific product codes unless you have a firm reason. Those decisions come later and are better made with the drawings in front of you.

Also leave out anything you are not sure about, or mark it clearly as open. "We might want a loft conversion in five years" is helpful. Quietly hoping the architect will guess it is not.

Things that are worth including even if they feel minor

• Known site issues: a shared drain, a protected tree, a neighbour who has objected before.
• Accessibility needs, now or expected.
• Any previous drawings, surveys or planning history for the property.

FAQ

How long should an architect brief be?

For a house extension or renovation, two to four pages is typical. Larger or more complex projects need more, but clarity matters more than length.

Will the architect change my brief?

Often, yes, and that is a good sign. A thoughtful architect will question parts of it and may rewrite it with you into a fuller design brief before concept drawings begin.

Should I send the brief before the first meeting?

Yes. Sending it a few days ahead lets the architect visit the site, check planning history and come prepared with sharper questions.

The Practical Takeaway

Spend one evening writing how you live, a rough room list with notes, a real budget and your fixed dates. Keep images to a handful with one line each. Send it ahead, and treat the first meeting as the start of editing the brief, not the end of it. For more on how good homes are planned, explore the architecture articles.