diff --git a/services/targo-hub/lib/roster.js b/services/targo-hub/lib/roster.js
index 030ad30..e28f285 100644
--- a/services/targo-hub/lib/roster.js
+++ b/services/targo-hub/lib/roster.js
@@ -351,10 +351,20 @@ function detectCharacteristics (job, items) {
   for (const a of items.filter(i => i.cat === 'addon')) if (hit(a.keywords)) picks.push({ id: a.id, qty: 1 })
   return picks
 }
+// Sites PRÉ-CÂBLÉS : une INSTALLATION y prend ~¼ du temps normal (infra déjà en place → branchement rapide).
+const FAST_INSTALL_SITES = ['lac des pins', 'camping', 'domaine dauphinais']
 function estimateForJob (job, items) {
   items = items || readJobChar().items
   const picks = detectCharacteristics(job, items); const by = {}; for (const i of items) by[i.id] = i
-  return { minutes: estimateMinutes(picks, items), picks, labels: picks.map(p => (by[p.id] || {}).label).filter(Boolean) }
+  let minutes = estimateMinutes(picks, items)
+  const labels = picks.map(p => (by[p.id] || {}).label).filter(Boolean)
+  // Installation à un site pré-câblé → temps /4 (Lac des pins / Camping / Domaine Dauphinais).
+  const isInstall = picks.some(p => String(p.id).startsWith('install')) || String(job.required_skill || '').toLowerCase().includes('install')
+  if (isInstall && minutes > 0) {
+    const loc = [job.address, job.location_label, job.service_location, job.subject, job.municipalite].join(' ').toLowerCase().normalize('NFD').replace(/\p{Diacritic}/gu, '')
+    if (FAST_INSTALL_SITES.some(s => loc.includes(s))) { minutes = Math.max(15, Math.round(minutes / 4)); labels.push('site pré-câblé ×¼') }
+  }
+  return { minutes, picks, labels }
 }
 
 // ── #56 Politique de créneaux offerts + holds temporaires ────────────────────