How many fields a trade enquiry form can carry

A field may be mandatory when the enquiry cannot be handled without an answer. That applies to three details. First a contact route: a phone number or an email address, either one, not both. Second the trade or the request as a choice, so the enquiry lands in the right hands immediately. Third the location, usually postcode and town, because the service radius decides the margin and an enquiry from eighty kilometres away is treated differently from one in the neighbouring village.

Everything else is optional and belongs in the form as such. The name does not qualify — it emerges on the return call and as a mandatory field is only one more hurdle. The full postal address does not qualify either; street and house number are needed once an appointment exists. Asking for them in the form collects personal data that may never be used and still has to be protected and deleted. How form and page structure work together is set out in our overview of websites for trade businesses.

In the trades the situation is visible but hard to describe. A picture of the fuse box shows in a second whether this is a distribution board from the seventies or an installation with a residual-current device. A photo of the roof shows pitch, covering and access. A shot of the plant room shows boiler, cylinder, flue and the space a new appliance would have. No text field in the world extracts that information from a person who lacks the vocabulary for it.

This makes the optional photo upload the most economical field in the whole form. It costs the person enquiring two taps, because the pictures are on the phone anyway, and it usually replaces several follow-up questions. 87 percent (Bitkom 2025) of businesses observe a markedly higher price sensitivity among their customers — a photo helps twice over here: the business can name a realistic range instead of pitching high as a precaution, and the person enquiring experiences the estimate as comprehensible. What pictures do for the rest of the site is covered in our article on photography for trade websites.

Technically the upload needs little: several files at once, the common image formats including those of current phones, a size limit per file with an understandable message rather than a red error line, and processing that shrinks the image after upload. What matters is the wording beside it: „if you have a picture to hand, it helps us judge the work“ is an invitation. „Please upload photos“ sounds like a requirement and gets skipped.

Many trade businesses place a consent checkbox under their form because they have seen it done that way. For processing the enquiry itself that is generally not the right route. Anyone asking for a quote through a form sets a pre-contractual measure in motion. Article 6(1)(b) of the General Data Protection Regulation permits processing that is necessary in order to take steps at the request of the data subject prior to entering into a contract. That is exactly the situation here.

This carries a practical advantage beyond appearances: consent can be withdrawn at any time. A business that bases processing on consent may lose that basis on withdrawal even though the enquiry is long since in progress. The pre-contractual measure, by contrast, carries for as long as the enquiry is being handled. Consent is only needed for everything beyond the enquiry — the newsletter, addition to a mailing list, passing the request to a partner business, storage for later advertising.

What remains indispensable is the information. Under Article 13 of the General Data Protection Regulation it must be apparent at the time of collection who is responsible, for what purpose the data are processed, on what basis, how long they are stored and what rights exist. A short sentence with a link to the privacy policy under the submit button generally covers this; the policy itself then has to contain the details. This article sets out the position factually and does not replace legal advice — in a specific case the review belongs in qualified hands.

85 percent (Bitkom 2025) of trade businesses see a clear wish among their customers for constant availability. In the trades availability rarely means a night shift; mostly it means the enquiry is written at eight in the evening on a sofa, not at ten in the morning at a desk. That is exactly where a form proves itself — on a screen narrower than any design view, operated with a thumb, often on a poor connection.

A handful of unspectacular rules cover this. Labels sit above the field, not inside it, so they stay visible while typing. Phone numbers and postcodes open the numeric keypad. The phone's autofill is allowed to work rather than being blocked by the form. Tap targets are at least forty-four pixels high, picklists included. And the submit button carries a label that says what happens — „send enquiry“ rather than „submit“.

After submission comes the part many forms forget: a confirmation page that summarises the details entered, names a realistic period for the reply and offers a phone number for urgent cases. It costs nothing and prevents the second enquiry through the contact form, the third through the business profile and the call the next morning. How profile and website work together here is covered in our article on the business profile.

How many fields a particular form can carry cannot be decided at a desk, only read off your own inbox. That needs no elaborate analysis and no external service: it is enough to note the number of enquiries submitted per month, the number that could be handled without a follow-up question, and the number that did not fit the service area at all. Three figures, once a month, on one sheet of paper.

After that only one thing is ever changed at a time. Remove one mandatory field, watch for four weeks, compare the figures. Add one picklist, watch for four weeks. Anyone making two changes at once will not know afterwards which one worked. That patience is easier to muster in the trades than elsewhere, because enquiry numbers are modest anyway and a single lost job is plainly visible.

The second look is about quality, not quantity. A form producing twenty percent fewer enquiries that can be handled without a call back may be the better choice for a business at capacity. A business looking for work decides the other way round. This weighing belongs in the ongoing care of the website, not in a one-off project; the contact page is the place to start that conversation.