To choose a web design agency in the UK, check seven things: portfolio quality with live examples, PageSpeed scores on their work, clear post-launch support terms, ownership rights in the contract, genuine client reviews, transparent pricing, and confirmation of who will actually do your work. This guide covers each in detail and includes the specific questions to ask before signing anything.
Choosing a web design agency is one of the most important decisions a UK small business makes. A good agency builds a site that ranks on Google and wins clients. A bad one takes your money and delivers something that looks outdated and does not rank. If you are also weighing up an agency against a freelancer, see our web design agency vs freelancer comparison.
Here is a practical framework for telling the difference.
1. Check the portfolio — with live links
Any serious agency will have a portfolio of completed work. The key is to look at live sites, not screenshots or mock-ups. Screenshots can be faked or outdated. A live site shows you exactly what they deliver.
When reviewing portfolio work, look for:
- Sites for businesses similar to yours in size and industry
- Clear, professional design that does not look like a template
- Mobile versions that work properly on your phone
- Fast load times (navigate the site — does it feel quick?)
If the agency cannot provide live links, that is a warning sign.
2. Ask for PageSpeed scores
Ask the agency: "What is the Google PageSpeed score on mobile for your recent work?"
A well-built website typically scores 85–98/100. A site below 70 has performance problems that will hurt Google rankings and conversion rates. Most template-based sites score 40–65.
If the agency does not know what PageSpeed Insights is, or cannot answer the question, they are not building for performance.
3. Understand exactly what is included post-launch
The build is only the beginning. After launch, your site needs:
- Hosting (server costs, typically £10–£50/month)
- SSL certificate renewal
- Security updates and monitoring
- Content updates when you need to change text or photos
- Technical maintenance
Many agencies bill these separately after launch, which can easily add £100–£500/month on top of what you paid for the build. Get clarity on this in writing before signing.
At Octelis, hosting, security, and monthly content updates are all included in the monthly subscription price.
4. Confirm ownership terms in writing
Ask directly: "Who owns the website if I leave?"
The honest answer should be: you own your domain name and content at all times. Reputable agencies build sites you can take elsewhere if you choose.
Some agencies lock clients in by hosting the site on proprietary infrastructure that cannot be migrated, or by not providing source code on exit. This is not in your interest. If the answer to the ownership question is vague or defensive, treat it as a red flag.
5. Read genuine client reviews
Google reviews and Clutch.co ratings from real clients tell you more than any sales conversation.
Look for:
- Patterns, not just star ratings — do multiple clients mention the same strengths or problems?
- Specifics — vague reviews ("great work!") are less useful than specific ones ("delivered on time, explained the SEO work clearly")
- Recent reviews — agency quality changes over time; recent reviews matter more than old ones
- How they respond to negative reviews — this tells you about their professionalism under pressure
A reputable UK agency should have at least 10 Google reviews averaging 4.5+.
6. Get a clear written quote
A professional agency gives you a written scope and price before starting work. This should include:
- What pages will be built
- What is included in the price (copy, photography, SEO setup, schema markup)
- What is not included
- Payment terms and timeline
- What happens if scope changes
"It depends" is an acceptable first answer. A written quote with a clear number is what you need before signing.
7. Confirm who will actually do your work
At some larger agencies, you deal with an account manager in sales, then your project is handed to a junior designer or outsourced to another country. This is not always disclosed upfront.
Ask: "Who specifically will design and build my website?" and "Will the same person be involved throughout?"
A smaller specialist agency or a subscription agency like Octelis will usually give you direct access to the people doing the work.
The questions to ask before signing
Print these out and ask them:
- Can I see live examples of sites you have built for businesses similar to mine?
- What is the Google PageSpeed score on mobile for your recent work?
- What is included post-launch — hosting, SSL, security, content updates?
- Who owns the website if I leave?
- What does the contract say about revisions and scope changes?
- Who will specifically design and build my site?
- Can I speak to a recent client for a reference?
If an agency struggles to answer any of these, take your project elsewhere.
Frequently asked questions
How do I choose a web design agency in the UK?
Check their portfolio with live links, ask for PageSpeed scores on recent work, confirm what is included post-launch, understand ownership terms in writing, read genuine client reviews, get a clear written quote, and confirm who will actually do your work.
What should I ask a web design agency before hiring them?
Ask for live portfolio examples, PageSpeed scores, post-launch support terms, ownership rights, a written quote, and who will specifically work on your project.
What are red flags when choosing a web design agency?
No live portfolio, vague pricing, inability to explain their process, no mention of SEO or page speed, unclear ownership terms, and suspiciously low prices for "custom" work.
How much should I pay for a web design agency in the UK?
A professional agency charges £3,000–£10,000 for a small business website. Subscription agencies like Octelis charge from £80/month with no upfront fee.
Should I use a local or national web design agency?
Location matters less than quality. The important factors are portfolio, process, and post-launch support. A local agency may understand your local market better, but a good national agency can deliver the same results remotely.
Related reading:
- How to Choose a Web Design Agency in Birmingham - the same checklist applied to the Birmingham market
- Best Web Design Agencies in Birmingham - what separates good agencies from average ones
- What Every Small Business Website Needs in 2026 - know what you're buying before you commission it
- How Much Does a Website Cost in the UK? - full cost breakdown across all provider types
- Web Design Agency vs Freelancer UK - the alternative to agency: when to consider a freelancer
