Consulting is the part of this trade where somebody tells you what to do and does not do it, and the reason to buy it separately is that the person recommending a large project usually profits from a large project. A consultant paid for judgement can tell you that the redesign you were planning is unnecessary, that the real problem is the offer, or that the quote you have is for the wrong thing. That advice is worth money precisely because it can be inconvenient.
Separating advice from production removes a real conflict
An agency that scopes the work and then bills for it has an interest in the work being large. That does not make agencies dishonest; it makes their recommendations systematically optimistic about the value of building things. Paying somebody who will not do the build to write the specification costs a fraction of the project and routinely changes what the project is.
The useful deliverable is a specification you can put out to tender
Not a strategy deck: a document that says what is being built, what it must do, who maintains it, what the content is, what the technical requirements are and how success will be judged. With that, you can get comparable quotes from three suppliers instead of three proposals for three different projects. It is the single most valuable thing a consultant produces for a buyer.
Expect to be told not to rebuild
A great many sites do not need replacing. They need the content rewritten, three technical faults fixed, a faster host and somebody to keep them current. A consultant who reaches that conclusion has saved you most of a project budget and will sometimes struggle to get paid for it, which is exactly why the engagement should be priced in advance rather than contingent on what is found.
Ask what they will not do
A consultant who also builds sites is in the same position as the agency, whatever they say about keeping the roles separate. If you want independent judgement, hire somebody whose business is advice, ask directly whether they take referral fees from suppliers, and get the answer before the engagement. Both arrangements exist and only one of them is what you thought you were buying.
It is worth it above a certain project size
For a small business commissioning a modest site, a consulting layer is disproportionate and the money is better spent on the build. For anything where the quotes run into serious money, or where the last site was a disappointment, a few days of independent scoping is the cheapest insurance available. The threshold is roughly where the cost of being wrong exceeds the cost of the advice.
Questions people ask about web design consulting services
Why hire a consultant as well as an agency?
Because the agency that scopes the work also bills for it, which makes its recommendations systematically optimistic about building things. Independent scoping costs a fraction of a project and often changes what the project is.
What should a consulting engagement produce?
A specification you can put out to tender: what is being built, what it must do, who maintains it, the technical requirements and how success is judged. That turns three incomparable proposals into three comparable quotes.
Is it worth it for a small business?
Usually not for a modest site, where the money is better spent on the build itself. It becomes worth it where the quotes are substantial, or where a previous attempt disappointed and nobody has diagnosed why.
Can the same firm advise and build?
They can, and then you no longer have independent advice, whatever the arrangement is called. If independence is the point, hire somebody whose business is advice and ask directly about referral fees before you start.