diff --git a/.gitignore b/.gitignore
index 895d68a..e01a407 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 itb-ranking
+*.json
diff --git a/main.go b/main.go
index c711d6a..fe400c1 100644
--- a/main.go
+++ b/main.go
@@ -89,6 +89,17 @@ type Player struct {
 }
 var players []Player
 
+type Builder struct {
+	player_id int
+	name string
+	combined float64
+	box_count int
+	box_count_rank float64
+	box_rank_avg float64
+	box_rank_avg_rank float64
+}
+var builders []Builder
+
 func main() {
 	if len(os.Args) < 1 {
 		log.Fatal("Not enough arguments: sqlite_file")
@@ -537,6 +548,94 @@ func main() {
 	of.Write(j)
 	of.Close();
 
+	//
+	// BUILDER RANKING
+	//
+	for i := range boxes {
+		found := false
+		for b := range builders {
+			if builders[b].name == boxes[i].builder {
+				found = true
+				s := builders[b].box_rank_avg * float64(builders[b].box_count) + boxes[i].combined
+				builders[b].box_count += 1
+				builders[b].box_rank_avg = s / float64(builders[b].box_count)
+				break
+			}
+		}
+		if found {
+			continue
+		}
+
+		if (boxes[i].builder == "sofar") || (boxes[i].builder == "nore") {
+			continue
+		}
+
+		var n Builder
+		n.name = boxes[i].builder
+		n.box_count = 1
+		n.box_rank_avg = boxes[i].combined
+
+		builders = append(builders, n)
+	}
+
+	// rank box count
+	sort.Slice(builders, func (a, b int) bool { return builders[a].box_count > builders[b].box_count })
+	step = 1.0 / float64(len(builders))
+	lastrank = 1.0
+	last = 0
+	for i := range builders {
+		c := builders[i].box_count
+		if c == last {
+			builders[i].box_count_rank = lastrank
+		} else {
+			last = c
+			lastrank = 1.0 - step * float64(i)
+			builders[i].box_count_rank = lastrank
+		}
+	}
+
+	// rank boxes scoring
+	sort.Slice(builders, func (a, b int) bool { return builders[a].box_rank_avg > builders[b].box_rank_avg })
+	step = 1.0 / float64(len(builders))
+	lastrank = 1.0
+	lastf = .0
+	for i := range builders {
+		c := builders[i].box_rank_avg
+		if c == lastf {
+			builders[i].box_rank_avg_rank = lastrank
+		} else {
+			lastf = c
+			lastrank = 1.0 - step * float64(i)
+			builders[i].box_rank_avg_rank = lastrank
+		}
+	}
+
+	// combine
+	for i := range builders {
+		builders[i].combined =
+			builders[i].box_rank_avg_rank +
+			builders[i].box_count_rank
+	}
+	sort.Slice(builders, func (a, b int) bool { return builders[a].combined > builders[b].combined })
+	var builder_topranks = make(map[string]string)
+	for i := range builders {
+		if i > 30 {
+			break
+		}
+		builder_topranks[fmt.Sprintf("%v", i + 1)] = fmt.Sprintf("%v", builders[i].name)
+	}
+	j, err = json.Marshal(builder_topranks)
+	if err != nil {
+		log.Fatal(err)
+	}
+	// write to disc!
+	of, err = os.Create("top_builders.json")
+	if err != nil {
+		log.Fatal(err)
+	}
+	of.Write(j)
+	of.Close();
+
 	defer db.Close()
 }
 
diff --git a/mod/init.lua b/mod/init.lua
index d500ba3..8ddf285 100644
--- a/mod/init.lua
+++ b/mod/init.lua
@@ -4,6 +4,7 @@ ranks = {}
 
 ranks.player = {}
 ranks.boxes = {}
+ranks.builder = {}
 
 local wp = minetest.get_worldpath()
 
@@ -41,6 +42,7 @@ end
 ranks.fetch = function()
 	ranks.player = fetch_file(wp .. "/top_players.json", "r")
 	ranks.box = fetch_file(wp .. "/top_boxes.json", "r")
+	ranks.builder = fetch_file(wp .. "/top_builders.json", "r")
 
 	minetest.after(300, ranks.fetch)
 end