The verdict in three sentences
A one-page site is a business card: it reassures a client who already knows you, but it almost never gets you found on Google. A 20-page site with one page per service and per town captures requests from developers, project owners and architects looking for a structural works contractor in your area. With projects at €60,000 and above, one extra signed quote a year repays the €7,000 gap.
What each format can capture on Google
| Indicator (2026 order of magnitude) | One-page | 20-page site |
|---|---|---|
| Build budget | €2,000 excl. VAT | €9,000 excl. VAT |
| Queries ranked after 12 months | 5 to 15 | 150 to 400 |
| Qualified organic visits per month | 30 to 80 | 400 to 1,200 |
| Service pages (masonry, foundations, slabs, extensions, refurbishment) | 1 shared block | 6 to 8 dedicated pages |
| Town pages (Nantes, Rezé, Saint-Herblain, Orvault, Carquefou, Vertou) | None | 6 to 10 local pages |
| Project references with photos | 3 to 6 thumbnails | 10 to 20 detailed case pages |
| Time to launch | 1 to 2 weeks | 6 to 8 weeks |
The difference is not design. Google ranks pages that answer a precise query, such as "structural works contractor Saint-Herblain" or "house foundations Rezé". A one-page site only has one page to offer.
From traffic to signed quote: the conversion chain
In B2B construction, the conversion rate from a qualified visit to a quote request is between 2 and 4%. Then about 15 to 25% of quotes sent are signed, depending on your price positioning.
| Monthly step (average assumption) | One-page | 20-page site |
|---|---|---|
| Qualified visits | 50 | 700 |
| Conversion to request | 3% | 3% |
| Quote requests | 1.5 | 21 |
| Relevant quotes (after screening) | 0.8 | 9 |
| Signing rate | 20% | 20% |
| Projects signed per year | About 2 | About 21 |
These are orders of magnitude: they depend on local competition, your Google reviews and the quality of your project photos. Even divided by three, the gap is clear.
Break-even in number of signed quotes
On an average €100,000 project with a 6 to 8% net margin, the margin earned is €6,000 to €8,000. The €7,000 investment gap is therefore covered by a single project signed thanks to the site, two at most with a small €60,000 job. Add €100 to €200 a month for maintenance and SEO monitoring on the 20-page site.
Mini case study
Laurent, managing director of a 35-employee structural works company near Nantes, turns over €4.5M, 80% from repeat contractors. He invests €9,000 in a 20-page site and €150 a month of monitoring, so €10,800 in the first year. Within 12 months the site brings 14 qualified requests and 3 signed projects averaging €85,000. At a 7% net margin, that is €17,850 of margin, or 1.65 times the investment in the first year.
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FAQ
Can a one-page site be enough for a construction SME?
Yes if 90% of your work comes from repeat contractors and you are not looking for new clients. It costs €1,500 to €2,500 and goes live in 2 weeks.
How long before the first requests arrive?
Local pages start ranking within 3 to 6 months. Full momentum usually comes between 9 and 12 months.
Should we write one page per town?
Yes, as long as each page is unique: projects completed in that town, ground conditions, timelines. Six to ten well-written towns beat 40 duplicated pages.
Do public contracts come through the website?
No, they come through public procurement platforms. The site still serves as a reference when a project manager checks your past work and trade certifications.
What annual budget should we plan after launch?
Allow €100 to €200 a month for maintenance, adding 1 or 2 project references a month and rank monitoring.
Let's scope your project. Send us your services, target towns and average project size: we will price a 15 to 25 page site with local SEO, deliverable in 6 to 8 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
