If you’re planning a home extension, renovation or self-build, architectural drawings are often one of the first steps in the process. But how much should you expect to pay for them?
Here’s a clear breakdown of what architectural drawings involve, how much they cost (based on real client examples from Design for Me), and how to choose the right service for your project.
How much do architectural drawings cost?
Architectural drawings are typically provided as part of a broader design service by an architect or architectural designer. Based on a £100k house extension, here’s how the architect’s fees are commonly broken down across the design and build process:
| Design Stage | Approx. Fee | What’s Included |
|---|---|---|
| Outline Design (35% of total fee) | £3,500 – £5,250 | Concept designs and planning drawings (often includes planning application) |
| Detailed Design for Tender (35% of total fee) | £3,500 – £5,250 | Technical drawings and specifications for Building Regulations and tendering |
| Construction Phase (30% of total fee) | £3,000 – £4,500 | Support during construction, site visits, liaising with the builder |
Source: How much does an architect cost?
What types of architectural drawings might you need?
The types and level of drawings required depends on your project, but typically fall into these categories:
- Concept and layout drawings – Early design ideas to explore layout, style and spatial planning.
- Planning drawings – Required for submitting a planning application.
- Building Regulations drawings – Technical documents for approval by building control.
- Detailed construction drawings – Precise specifications used by your builder during construction.
Not all projects require every stage. For example, some internal alterations may not need planning permission but will still require drawings for Building Regulations.
→ Do I need an architect for a planning application?
→ Do I need an architect for an extension?
What affects the cost of drawings?
While the example above is based on a £100k build, actual drawing costs will vary depending on:
- Project size and complexity
- Level of service and number of stages required
- Who you hire – Architects, designers and technologists all offer drawing services
- Location – Costs may be higher in London and the South East
→ Architect vs architectural designer or technologist
→ How to find a freelance architect
Can I commission drawings without a full architectural service?
Yes. Some professionals offer standalone drawing services—particularly for planning or Building Regulations stages. This can be a cost-effective option if you’re confident managing other parts of the project yourself.
However, many homeowners find value in having their architect support them through all stages, especially during tendering and construction.
Summary
For a typical house extension with a £100k budget, you can expect to pay around £3,500–£5,250 for architectural drawings at the outline design stage, including concept plans and planning drawings. Additional fees will apply for technical and construction drawings, as part of a full architectural service.
The best way to get accurate quotes is to speak with architects or designers who understand your needs and budget.
→ Post your project on Design for Me – we’ll match you with the right design professionals, free of charge.
Emily
