How long a B2B web design agency takes to finish a website depends on a few things: how big and complex the site is, how much custom development is involved, how quickly the client reviews and approves work, and how busy the agency is at the time.

A straightforward B2B website, say 10–20 pages with standard integrations and a basic content strategy, usually takes 8 to 14 weeks from kickoff to launch. That window covers discovery, sitemap work, wireframing, design, development, content integration, QA testing, and getting everything ready to go live.

Step up the complexity and the timeline stretches accordingly. Projects that involve deeper UX research, custom design systems, multiple buyer persona pathways, or CRM integrations generally land in the 16 to 24 week range. The extra time goes toward more thorough strategy work, additional rounds of feedback, and the technical lift that comes with all of it.

Enterprise-level projects, full platform rebuilds, multi-site architectures, custom API integrations, advanced security requirements, can run anywhere from 6 to 12 months. At that scale, the agency is usually working directly alongside the client's internal IT, marketing, and sales teams, which adds coordination overhead even when everyone is moving quickly.

Honestly, the thing that slows down most projects isn't the agency. It's the client side. Content gathering, stakeholder approvals, and feedback that comes in late or from too many directions are the most common reasons timelines slip. Good agencies deal with this upfront by setting firm deadlines for client deliverables before the project even starts, not as a formality, but because it actually matters.

Some agencies offer a phased launch approach: get a core version of the site live fast, then layer in additional features over time. If speed to market matters more than launching with everything at once, this is worth asking about.

Whatever timeline an agency gives you, build in a 10–20% buffer. Things come up. A transparent agency will set clear milestones and check in regularly so you're never left wondering where