How to Write a Design and Access Statement for a House Extension.

Check what your application actually needs before you write a word

Most ordinary householder extensions do not need a Design and Access Statement at all. The requirement bites when the property is listed, when it sits in a conservation area or World Heritage Site, or when the application falls into another statutory category. The national picture is a starting point only. Local authorities publish their own validation checklists, and an application missing a required document is invalid: nothing moves until you supply it. So the first job is a check, not a draft. Do these three things before opening a document:

1. Confirm the application route. Householder application, full planning permission, listed building consent, or something else. The route decides what the council expects with it.
2. Read the council's current validation list. Some authorities add locally worded requirements, such as a statement for a house within a conservation area or in the setting of a listed building. Treat that as a local rule to verify, not a national one to assume.
3. Look at the property's status. Listed, in a conservation area, under an Article 4 direction. Where works affect a listed building's character, listed building consent may be needed alongside planning permission, and that brings its own statement requirements.

The rules vary by authority and change over time. If your council says a statement is required, write one. If it says it is not, a short covering note describing the design is still often a sensible courtesy, but do not pad it into a report. ### Decide the length from the application type Official council guidance consistently describes a Design and Access Statement as a short report, not a general planning statement. No authority publishes a page count for a house extension. As working practice, a householder statement is typically a few pages, built around drawings and photographs rather than long paragraphs. A planning officer reads a great many of these in a week. A specific, drawing-led statement gets read. A padded one gets skimmed. ### Gather the inputs first The statement describes the drawings. It must never contradict them. Before writing, collect:

• Site photographs: front, rear, boundaries, the neighbouring windows that face the site.
• Existing plans and elevations.
• Proposed plans, sections and elevations.
• The site location plan.
• Any pre-application advice from the council.

The official requirements do not prescribe photographs, measured surveys or sun-path studies as attachments. They are reliable working inputs because they let you prove the analysis the statement has to contain. Unless your local checklist says otherwise, treat them as evidence you draw on, not as mandatory extras. ### Pick the structure now The statutory test is broader than any fixed template. The statement must explain the design principles and concepts applied, show how the site and setting were appraised, and demonstrate how that context shaped the proposal. It must also set out your approach to access. Local guidance commonly organises this under use, amount, layout, scale, appearance, landscaping, access, context and heritage. The familiar order of use, amount, layout, scale, landscaping, appearance and access is a defensible organising device, and an officer scanning for those headings will find them fast. Use it, but let the content follow the legal test rather than the other way round.

Steps 1 and 2: describe the site and the context, then state the design intent

### Step 1: write the site and context section from evidence Work from your own photographs and a measured survey. Specifics beat adjectives every time. Write "two-storey brick semi with a hipped roof, built in the 1930s, with a 12-metre rear garden facing south-west" rather than "a traditional dwelling in a pleasant setting". Cover:

• House type and period.
• The plot: width, depth, boundary treatments, levels.
• Orientation, and which neighbouring windows face the site.
• Street character: roof forms, materials, front and rear building lines.

Quote only figures you have measured or taken from your drawings. If the rear garden length is not on the survey, do not estimate it in the text. ### Name the constraints and say who decides them This is where a lot of statements go wrong, by claiming more than they can prove. Name the constraint, state how it shaped the design, and identify who decides it. Do not assert compliance.

• Conservation area or listed status: name it, and describe how the design responds. For a listed building, the statement must address the building's special architectural or historic interest, the physical features that support its designation, and its setting.
• Article 4 direction: name it and note that the council determines the application.
• Trees and boundaries: note retained trees and root protection as they appear on your drawings.
• Rights of light and overlooking: name the issue, describe what the design does about it, and leave the judgement to the officer. Rights of light are also a separate legal matter from planning, so do not present the statement as settling them.

### Step 2: state the design intent in a few sentences Write two or three sentences a client could repeat back to a neighbour: what the extension is for, what it adds, and the single idea driving its form. Then test it. If you cannot say it plainly, the design logic is not clear enough to put in front of an officer. Different extension types need genuinely different intent paragraphs. Do not recycle one template:

• Rear single-storey kitchen extension: "The extension replaces a cramped galley kitchen with a single family room opening onto the garden. A flat-roofed volume sits behind the original rear wall and is kept below the first-floor cill line so the existing elevation stays legible."
• Side return infill: "The proposal fills the narrow side passage to widen the rear kitchen, with a glazed roof strip admitting daylight to the new plan depth. The boundary wall height is held at its present line."
• Loft dormer: "A rear dormer provides one bedroom and a shower room within the existing roof volume. It is set back from the eaves and below the ridge so the front roof slope is untouched."

Each one states a purpose, a physical move and a restraint. That is the pattern: what it does, how, and what it deliberately leaves alone.

Steps 3 and 4: justify the scale, massing, layout and appearance

### Step 3: explain the massing against the house and its neighbours Describe the extension against the existing building, not in isolation. Cover the footprint, the height, the eaves line, the roof form, and how it steps back or sits subordinate to the original house. Every dimension you quote must come from your drawings, never from memory. A mismatch between the statement and the elevation is the fastest way to lose an officer's confidence. ### Describe the layout in plain language Explain what moves, what is kept and how the new space connects to the existing plan. Say where daylight comes from: a rooflight, a glazed return, a wide opening to the garden. You are narrating the plan for someone who has not walked the house. Keep it to what the drawings show. ### Step 4: justify the appearance by linking choices to context Materials, openings and roof finish each need a reason that points back to the site analysis. Brick match or deliberate contrast, window proportions and rhythm, roof finish: state the choice and the observation behind it. The difference between a vague line and a reasoned one is the whole skill: The right-hand column makes a claim the officer can check against the elevation in thirty seconds. That is what makes it persuasive.

Steps 5 and 6: cover access, landscaping and neighbour impact honestly

### Step 5: access, landscaping and boundaries National guidance asks you to explain your approach to access and to address any specific access issues. For a householder extension, describe what the proposal physically does:

• The approach to the entrance and whether it is step-free where the site allows.
• Door widths and threshold levels on the new work.
• How the existing entrance and circulation are affected.

Do not declare Building Regulations compliance here. The statement is not the place for it, and the sources do not support it. If there is an accessibility question, flag it for the professional responsible and let the formal assessment happen at the appropriate stage. Describe the entrance arrangement, circulation and constraints. Leave the compliance judgement to others. Landscaping is brief on a house extension but worth a few lines. State what hard and soft surfacing is lost or added, which trees are retained, how rainwater is dealt with, and any planting proposed. Keep it tied to the proposed site plan. ### Step 6: deal with the neighbours directly Overlooking, overshadowing and outlook from neighbouring windows are what officers and neighbours actually worry about, so address them head-on. Refer accurately to the proposed plans, sections and elevations. If you have produced a daylight or sun-path study, reference it. The sources reviewed do not require a Design and Access Statement to contain a sun-path study or fixed overlooking distances, so include one where the situation justifies it and do not claim the statement itself proves anything. Write what the design does and why:

• "The side wall is blank at first-floor level; there are no openings facing number 14."
• "The extension projects 3 metres from the rear wall, as shown on the proposed ground floor plan, and the eaves height is held at 2.6 metres at the boundary."

Both sentences cite figures from the drawings. If you cannot point to the drawing, do not write the number. ### Keep your claims modest State what the design does and leave the planning judgement to the officer. A statement that asserts policy compliance it cannot prove invites a request for more information, which costs you time. A modest, accurate statement gets through faster than an ambitious one that overreaches.

Build the document in Layout and prove your points with drawings and views

Once the content is clear, the production is mostly assembly. In ArchAdemia Tools, Layout (/presentation) has a Design and Access Statement template: a many-page A3 Document with placeholder text and image frames already in place. You replace the placeholders with your own content. Layout is available on every plan, including the Free trial, and manual layout work costs no credits. ### Bring the evidence into the pages Drag in your site photographs and proposed views, set a clean type hierarchy from the type library, and use the layout grid and guides so every page lines up. The grid is a reference overlay only and never prints or appears in an export. A consistent grid is what separates a statement that reads as a considered document from one that reads as pasted screenshots. ### Prepare the supporting views in the right tool Draw and cut the plan, section and elevation in Linea, which exports DXF and a true-scale PDF sheet with a title block. For a verified view of the proposed extension, use Image or Retouch. Retouch carries one-click re-light presets (Golden hour, Dusk, Blue hour, Night, Overcast, Sunny) that regenerate a render at a different time of day, which is useful when you are explaining how daylight reaches the new space. Be clear in the statement about what any visual is: an illustrative view of the proposal, consistent with the submitted drawings, not a substitute for them. ### Use Corb to draft and tighten, then edit every line Inside Layout, you can select a text frame and ask Corb to fill that one in, or ask it to build a first-pass document from a prompt, working page by page from the template on a model you choose. Treat that as a drafting aid. Corb writes copy. It does not check compliance, approve a scheme or tell you the application will succeed. Read every line against your drawings and replace anything that is vague, unmeasured or unsupported. Asking Corb to write or build uses credits; the manual layout work does not. ### Export and check Export a vector multi-page PDF at true sheet size, with optional bleed and crop marks if you are printing. Before uploading to the planning portal, check the statement one last time against the submitted drawings: every dimension, every material, every reference to a plan number. If a client needs to sign off first, you can share a revocable read-only link instead of emailing attachments around. ### The takeaway Confirm what your council actually requires, gather your drawings, then write a short, specific statement that describes what the design does and why, tied to evidence you can point to. Use the familiar headings so an officer finds what they need quickly. Keep every claim to what your drawings show, and leave the planning judgement where it belongs. A few well-evidenced pages will always beat a long statement that promises more than it proves.