diff --git a/src/util/skeleton-utils.js b/src/util/skeleton-utils.js
index 64ae5e50..8a25ae80 100644
--- a/src/util/skeleton-utils.js
+++ b/src/util/skeleton-utils.js
@@ -401,35 +401,50 @@ export const skeletonBuilder = (roofId, canvas, textMode) => {
   console.log('baseLinePoints:', orderedBaseLinePoints)
 
   // baseLinePoint에서 roofLinePoint 방향으로 45도 대각선 확장 후 가장 가까운 접점 계산
-  let roofLineContactPoints = orderedBaseLinePoints.map((point, index) => {
+  // 각 포인트의 dx, dy, sign 정보 수집
+  const contactData = orderedBaseLinePoints.map((point, index) => {
     const roofPoint = roofLinePoints[index]
-    if (!roofPoint) return point
+    if (!roofPoint) return { dx: 0, dy: 0, signDx: 0, signDy: 0 }
 
     const dx = roofPoint.x - point.x
     const dy = roofPoint.y - point.y
-    const absDx = Math.abs(dx)
-    const absDy = Math.abs(dy)
+    return { dx, dy, signDx: Math.sign(dx), signDy: Math.sign(dy) }
+  })
 
-    // 거리가 0이면 이미 같은 위치
-   // if (absDx === 0 && absDy === 0) return point
+  // maxStep: 모든 포인트 중 가장 큰 45도 step
+  const maxStep = contactData.reduce((max, data) => {
+    return Math.max(max, Math.min(Math.abs(data.dx), Math.abs(data.dy)))
+  }, 0)
 
-    const step = Math.min(absDx, absDy)
-   // if (step === 0) return point
+  // baseLine 폴리곤의 중심 계산 (확장 방향 결정용)
+  const centroid = orderedBaseLinePoints.reduce((acc, p) => {
+    acc.x += p.x / orderedBaseLinePoints.length
+    acc.y += p.y / orderedBaseLinePoints.length
+    return acc
+  }, { x: 0, y: 0 })
+
+  // 모든 포인트를 동일한 maxStep으로 45도 확장
+  let roofLineContactPoints = orderedBaseLinePoints.map((point, index) => {
+    const data = contactData[index]
+    const { dx, dy } = data
+
+    // dx 또는 dy가 0인 경우 중심에서 바깥쪽 방향으로 확장
+    let signDx = data.signDx
+    let signDy = data.signDy
+    if (signDx === 0) {
+      signDx = point.x >= centroid.x ? 1 : -1
+    }
+    if (signDy === 0) {
+      signDy = point.y >= centroid.y ? 1 : -1
+    }
 
-    const nextX = point.x + Math.sign(dx) * step
-    const nextY = point.y + Math.sign(dy) * step
     return {
-      x: nextX,
-      y: nextY
+      x: point.x + signDx * maxStep,
+      y: point.y + signDy * maxStep
     }
   })
 
-  const maxContactDistance = orderedBaseLinePoints.reduce((max, point, index) => {
-    const contactPoint = roofLineContactPoints[index]
-    if (!contactPoint) return max
-    const dist = Math.hypot(contactPoint.x - point.x, contactPoint.y - point.y)
-    return Math.max(max, dist)
-  }, 0)
+  const maxContactDistance = Math.hypot(maxStep, maxStep)
 
   let changRoofLinePoints = orderedBaseLinePoints.map((point, index) => {
     const contactPoint = roofLineContactPoints[index]
@@ -458,7 +473,7 @@ export const skeletonBuilder = (roofId, canvas, textMode) => {
     roofLineContactPoints = movingLineFromSkeleton(roofId, canvas)
   }
 
-  console.log('points:', roofLineContactPoints)
+  console.log('points:', changRoofLinePoints)
   const geoJSONPolygon = toGeoJSON(changRoofLinePoints)
 
   try {