A website redesign involves partially or completely rebuilding a website: its architecture, design, code and content. The project requires several technical skills at once, and the agency you choose to lead it will shape both the final result and how the work unfolds. Here are seven practical criteria to help you assess providers before signing.
1. Understanding your business and objectives
An agency that opens the conversation by talking about its favorite framework or proprietary tools has things backwards. The first deliverable should be an assessment of your business challenges, not a technical proposal. After an initial discussion, the provider should be able to explain what the website needs to achieve: generate qualified leads, reduce support calls, or display a product catalog that can be filtered by regulatory requirements.
To assess this skill, share a brief outline and pay attention to the questions you get in return. A good agency will dig into user journeys, current pain points and the performance indicators you already track. If the response is just a quote with no restatement of your needs, that’s a clear warning sign.
For more information, Transtec’s criteria for choosing a web agency explain this discovery phase and the questions to ask from the very first conversation.
2. Technical expertise and website redesign portfolio
Building a website from scratch and redesigning an existing one are two different challenges. A redesign involves migrating content, managing redirects, transferring data and often preserving the SEO rankings you’ve already earned. Check that the agency addresses these requirements in its proposal.
A portfolio of documented redesign projects is more valuable than a gallery of screenshots. For each project, ask what the website was like before, which problems the redesign solved and what measurable results followed launch. An agency that can answer these questions clearly demonstrates a thorough understanding of the entire process.
3. Transparency around redesign timelines and budgets
A single total price with no breakdown by line item obscures how costs are actually allocated. Ask for a detailed estimate by project phase: audit, UX design, development, content integration, testing and production launch. This level of detail makes it easier to compare proposals on a like-for-like basis and spot underbudgeted items.
When it comes to scheduling, be wary of overly short timelines that don’t account for your own review and approval time. A realistic schedule includes feedback rounds on mockups, content delivery and testing phases. The agency should clearly state which tasks are its responsibility and which depend on you.
4. UX/UI approach and user-centered design
Redesigning a website isn’t just about aesthetics. A UX/UI approach structures user journeys so visitors can achieve their goals (buy, get in touch or find information) with as little friction as possible. In practical terms, the agency should present a method that includes at least:
- An audit of existing user journeys, based on analytics data or user testing, to identify current friction points
- Interactive prototypes created before development and reviewed by real users or your business teams
- Accessibility checks from the design stage, particularly since the European Accessibility Act has applied since June 28, 2025, to certain online services (commerce, banking and transport)
If the agency presents only static mockups, with no documented user journeys, its UX approach is superficial.
5. Technical support and post-launch follow-up
Going live isn’t the end of the project. The first few weeks often reveal minor bugs, content adjustments and sometimes performance issues under real-world traffic. The contract should specify the duration and scope of post-launch support: included fixes, guaranteed response times and the number of maintenance hours provided.
Beyond this initial period, clarify the proposed maintenance model. Some agencies charge a monthly fee that covers security updates and minor improvements. Others work on a per-ticket basis, which may suit websites with occasional update needs. Neither model is universally better, but no follow-up plan at all is a warning sign.
6. Methodology and structured project process
A reputable agency will explain its process before talking about results. Ask for a step-by-step outline of how a typical redesign project works. Check the following:
- How often progress meetings are held and in what format (weekly, using a shared project management tool)
- Which interim deliverables are submitted for approval (site structure, wireframes, mockups, functional prototype)
- The testing and approval process before launch, including performance and browser compatibility tests
A documented process reduces misunderstandings and gives everyone a clear view of actual progress. If the agency mentions an “agile” approach but can’t explain sprint length, ceremonies or the tools it uses, the term is just a sales pitch.
7. Client references and verifiable feedback on redesign projects
Testimonials featured on an agency’s website are handpicked. For a reliable opinion, ask for contact details for two or three clients whose projects are similar to yours in size, industry or technical complexity. Reach out to them directly.
Useful questions include whether the agency met its deadlines, how responsive it was when unexpected issues arose, the quality of communication during the project and its availability after launch. A satisfied client will talk about the process, not just the outcome.
Also check how recent the references are. A portfolio made up entirely of projects from several years ago may point to a recent slowdown or a lack of expertise with current technologies.
These seven criteria complement one another. A technically brilliant agency that’s vague about its schedule can be just as frustrating as a transparent provider that can’t deliver a high-performing website. Taken together, the seven points provide a filter that eliminates most risks before the project even begins.
