The verdict in three sentences
A 3G-optimized redesign costs between 700,000 and 1,800,000 FCFA in 2026, with a 3 to 5 week lead time. The technical goal is clear: page weight under 500 KB, LCP under 3 seconds on 3G, and AVIF images. In markets where most visits come from mobile, this optimization delivers up to +45% form completion rate.
Before / after performance
Speed is not a luxury: on 3G, every extra second of load time drives visitors away. Here is the measured impact of a typical redesign.
| Metric | Before redesign | After redesign | 2026 target |
|---|---|---|---|
| Page weight | 2.4 MB | 480 KB | < 500 KB |
| LCP on 3G | 8.2 s | 2.7 s | < 3 s |
| Image format | JPEG | AVIF | AVIF / WebP |
| Mobile Lighthouse score | 42 | 94 | > 90 |
| Mobile bounce rate | 68% | 41% | < 45% |
| Form completion rate | 4.1% | 5.9% | +45% relative |
Switching to AVIF images alone divides visual weight by 4 to 6 versus JPEG, with no visible quality loss.
What the redesign includes
| Item | 2026 order of magnitude (FCFA) |
|---|---|
| Initial performance audit | 80,000 - 150,000 |
| Design redesign + integration | 400,000 - 900,000 |
| AVIF image optimization | 60,000 - 150,000 |
| Code rewrite / lazy loading | 100,000 - 300,000 |
| Caching + CDN | 60,000 - 200,000 |
| Real 3G testing | 40,000 - 100,000 |
One essential point: test on real 3G conditions, not just simulation. A site scoring 90 in the lab can crawl on a real local connection.
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Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Keita, head of a distribution SME, has his site redesigned for 1,200,000 FCFA. His old site (2.4 MB, 8.2 s LCP) had a 4.1% form completion rate. After redesign (480 KB, 2.7 s LCP), the rate rises to 5.9%, i.e. +45% relative. With 2,000 mobile visitors per month, that means 36 extra leads per month (from 82 to 118). At an 8% sales conversion and a 350,000 FCFA basket, the redesign generates about 1,000,000 FCFA in additional monthly revenue, paid back in just over a month.
FAQ
Why optimize for 3G? A large share of visitors connect over 3G or unstable 4G. A heavy site drives away 6 in 10 visitors before it even renders. 3G optimization is a direct commercial advantage.
What is LCP and why target 3 seconds? LCP (Largest Contentful Paint) measures the time to display the main content. Beyond 3 s on 3G, bounce rate spikes. Aiming under 3 s is the 2026 quality standard.
Why the AVIF format? AVIF cuts image weight by 4 to 6 times versus JPEG with no visible loss. It is the most cost-effective lever to lighten a mobile page.
Should I rebuild everything or optimize the existing site? If the technical base is sound, targeted optimization (images, cache, code) sometimes suffices for 700,000 FCFA. If the site is old, a full redesign pays off more in the long run.
How long does a redesign take? Between 3 and 5 weeks in 2026, audit included. The bulk of the work is media optimization and caching.
Let's scope your project. Send us your current site URL and budget (700,000 to 1,800,000 FCFA): we run a performance audit and frame the redesign. 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.
