Gilpost · Seongdong-gu, Seongsu-dong 2-ga
Western
PIZZA SLICE SEOUL
피자 슬라이스 서울 Pija Seullaiseu Seoul The name is plain English for what the shop sells: New York-style pizza by the slice. Several posts say the brand started in Tokyo.
Compiled from 19 blog posts read in fullSources →
A by-the-slice pizza shop in the basement of the thisisneverthat building at 159 Achasan-ro, Seongsu. You pick a slice from the display case, they reheat it in the oven, you collect it when your number is called and bus your own tray afterwards. Slices run from 6,200 won (cheese) to 7,800 won (meatball, white Hawaiian); the daily slice cost 8,000 won on the days people went. Garlic knots are 3,000 won, fries 4,000, and there is beer and cocktails. We read 30 posts from 1 September to 6 October 2026; 20 were about this shop and 19 were actual visits.
Data as of · Published ·
Location & hours
- Address서울특별시 성동구 아차산로 159, 제이케이앤디 지하1층 (성수동2가)159 Achasan-ro, Seongdong-gu, Seoul
- Phone010-8174-9050
- Typical spend₩3,000 – ₩8,000
- From the station4 posts say it is walkable from the station.
- Floor areaFloor area 110 m² · Status In business
When it opens
Of 14 posts: 13 wrote Daily 11:00–20:00.
| Daily | 11:00–20:00 | 13 of 14 posts |
|---|---|---|
| Last order | 19:30 | 10 of 10 posts |
Counted from what bloggers wrote in their posts; we did not confirm it with the restaurant. Where the values differ, it may be a change over time rather than a disagreement, so we show when each one was written.
What sets it apart
- Because you eat with your hands, there is a dedicated hand-washing sink in the dining room. Eleven posts mention it; one notes a sign reading HAND WASH ONLY, and several say it sits next to the tray return and recycling bins.
- The kitchen is fully open. Ten posts say so, and three describe watching staff stretch out the very large dough, around opening time or toward evening.
- Slices are large: ten posts say so. On how many to order, posts split between one being enough and two for a hungry diner; one post found the crust thin enough that two people could have shared three.
What 19 bloggers said
Today's Slice
Large portions
We read all 19 in full. The most common claims are “Large portions” (10) and “Clean” (9).
What they liked
What they struggled with
Things you can check on site
- In a basement 14 of 19 posts
- Hand-wash sink in the dining area 11 of 19 posts
- Open kitchen 10 of 19 posts
- Beer served 8 of 19 posts
- Large windows 8 of 19 posts
- Reachable by transit 4 of 19 posts
- High chairs 4 of 19 posts
- Lift to the floor 4 of 19 posts
- Takeout 3 of 19 posts
- Waiting area 2 of 19 posts
- Toilet inside 1 of 19 posts
- High ceiling 1 of 19 posts
- Separate restrooms 1 of 19 posts
These are raw counts, not percentages. Someone who did not mention something is not someone who disagreed.
Who came, and with whom
- Date 4 of 19 posts
- Solo visit 3 of 19 posts
- With a friend 3 of 19 posts
Where it is
We could not find this shop’s own listing on Naver Map, so the link searches for its Korean name around this spot instead.
From the station
4 posts say it is walkable from the station.
Getting inside
| In a basement | 14 of 19 posts |
|---|---|
| Lift to the floor | 4 of 19 posts |
| Toilet inside | 1 of 19 posts |
| Separate restrooms | 1 of 19 posts |
It is underground but not dark. Fourteen posts describe going down stairs or an elevator to B1, and eight say sunlight comes in through a full-height window; three mention a bamboo garden outside it, and one says it felt like a ground-floor shop. One post warns the entrance is easy to miss.
No post describes actually entering with a wheelchair or stroller. Four mention an elevator down to B1, and one says a stroller could come down that way, without having tried it. Nobody mentioned a step at the entrance — we don't know either way.
Several posts say the toilets are clean, but where they are is unclear: one says inside, one says down the corridor opposite the café, and one describes the women's room. The 'separate men's and women's toilets' line in several posts is copied from listing info and not counted.
No one mentioned: Second floor · Ramp at the door · Step at the entrance · Step-free access · Accessible toilet. That is not the same as there being none — it means we could not confirm it. Worth calling ahead, and do tell us: we will put it here.
How to read these posts
- Posts disclosing payment1 of 19 posts
- Posts saying they paid themselves1 of 19 posts
- Posts saying nothing either way17 of 19 posts
Posts that followed a TV spot
Of the 20 posts we gathered, 1 went up on a single day right after a TV spot and show no sign of a visit. They retell the broadcast, so we left them out of the counts.
We do not discard them. That a TV spot produced a burst of posts is itself something worth knowing about a place, and a star rating will not show it.
When the posts appeared
Month by month
| Month | Posts |
|---|---|
| 2026-09 | 16 |
| 2026-10 | 3 |
What we do not know
- Four posts call the staff friendly; one describes them as simply indifferent, in a deliberately casual way. A line in another post about others praising the service is second-hand and not counted.
- Opinions on price split: four posts call it reasonable or good value, one says it is expensive for a single slice, and two say it is not cheap but fair for Seongsu or for the size. A meal of one or two slices plus a drink came to roughly 10,000–20,000 won.
- Four posts give walking times: 9 and 5 minutes from Seongsu Station exit 2, 8 minutes from Konkuk Univ. Station, or straight along the main road from exit 2. The '430 m from exit 2' line is copied listing info. No one mentions a bus.
- No post reports waiting. Two walked straight in, and two went at quiet weekday times (2 pm, 4:30 pm). Nobody says whether there is a line at weekend mealtimes. Two posts note waiting stools or a waiting area by the entrance.
- Company splits three ways: four went as a couple, three with friends, three alone. Several posts mention one- and two-person tables and bar seating suited to solo diners. Nobody went with children, though four saw high chairs.
- Fifteen posts give the same hours — daily 11:00–20:00, last order 19:30 — mostly copied from the Naver listing; two add there is no break time and one that it never closes. Four posts list the phone number 010-8174-9050. Two say custom-lettered pizzas can be ordered via Naver booking, but none says whether tables can be reserved.
- Eleven of the 20 posts about this shop repeat the same three search phrases in titles and hashtags and copy the same amenities line — they look like commissioned posts, though only one discloses sponsorship. The same-named branch on the 4th floor of Musinsa Megastore (104 Achasan-ro) is a different location and is not counted here.
Sources (19)
Every number above was counted from the posts below.
- 피자 슬라이스 서울 성수 내돈내산 후기 | 페퍼로니피자, 간맥 피맥! 2026-10-03 · 애준이는 오늘도 돌아다님
- [서울] 피자 슬라이스 서울 : 성수 피자 맛집 혼밥하기 좋은 조각피자 2026-10-01 · 담비의 일상 · via Daum
- 피자 슬라이스 성수 | 미국식 조각피자 맛집, 메뉴 추천 2026-10-01 · *얄짤없는 맛평가블로그* 맛챠 Matcha
- [성수동] 성수역 근처 디스이즈네버댓 에서 만나는 세상 힙한 성수 .... 2026-09-30 · 순간은 시간으로, 방황은 방향으로
- 서울 성수 간단히 피자한조각으로 한끼를 해결할 수 있는 성수 피자.... 2026-09-30 · § 행복한 Churin이네 §
- 성수에 미국이 통째로 들어왔다! 피자 슬라이스 서울 솔직 후기, 본.... 2026-09-28 · 여의도 먹상무의 돈, 맛, 투자, 사람
- 성수 피자 맛집 피자 슬라이스 서울, 한 조각씩 골라 먹기 좋은 곳 2026-09-28 · ෆ보라로그ෆ
- 성수 피자 맛집ㅣ 뉴욕 감성 그대로! 부담 없는 성수 혼밥 피자집 '.... 2026-09-25 · whaslife
- 감각적인 음악과 분위기! 성수 피자 맛집 슬라이스 서울 방문 후기 2026-09-24 · LUCY의 뷰티 패션 BLOG...୧(๑•̀ᗝ•́)૭
- 성수동 핫플 식당 혼밥 맛집 피자 슬라이스 서울 피맥 하기 좋은곳 2026-09-21 · 다 먹는 블로그
- [성수 피자 맛집] 고급 카페 감성의 성수동 핫플 식당 피자 슬라이스.... 2026-09-17 · 까짜의 맛있는 이야기
- 성수 피자 맛집 | 피자 슬라이스 서울 2026-09-17 · ☆wons log☆
- 성수 맛집/ 미국식 피자 / 피자 슬라이스 서울 (PIZZA SLICE SEOUL) 2026-09-16 · A Whole New World
- 성수 피자 맛집 피자 슬라이스 서울 조각피자와 갈릭노츠 후기 2026-09-16 · 마이포켓
- 성수동 핫플 식당 피자슬라이스 페퍼로니 미트볼 조각피자 후기 2026-09-14 · 내가, 무얼, 더
- 성수 피자 맛집 피자 슬라이스 서울 성수동 핫플 식당 성수 혼밥 피.... 2026-09-11 · 햄톨이의 여행
- 성수 혼밥하기 좋은 피자집ㅣ피자 슬라이스 서울 2026-09-09 · 오늘도, 효녕
- 성수동 핫플 식당, 피자 맛집 피자 슬라이스 서울 2026-09-08 · ᴋᴇᴇᴘ ɪᴛ sɪᴍᴘʟᴇ
- 성수 피자 맛집｜피자 슬라이스 서울｜감성 넘치는 도쿄 스타일 성수 혼밥 피자집 2026-09-04 · 파워J 쭈히의 여행스토리 · via Daum
Of 310 candidate posts we opened 55 and kept 19 as evidence. We stop once 30 are confirmed: beyond that the counts grow in proportion without changing the answer.