snapshot 2026-10-20

README.md

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+---
+license: cc-by-sa-4.0
+language:
+- fa
+- en
+pretty_name: Tehran & Karaj apartment rent asks (Divar)
+size_categories:
+- 10K<n<100K
+task_categories:
+- tabular-regression
+tags:
+- real-estate
+- rent
+- tehran
+- iran
+- tabular
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: data/train.parquet
+  - split: test
+    path: data/test.parquet
+---
+
+# Tehran & Karaj apartment rent asks (Divar)
+
+Asking rents of whole-flat yearly leases listed on [Divar](https://divar.ir) in 489 neighborhoods of
+Tehran (five zones covering all 22 municipal districts) and Karaj. Built by `hf_dataset.py` of
+[rent.nlogn.ir](https://rent.nlogn.ir) from the crawl snapshots 2026-10-09, 2026-10-13, 2026-10-15, 2026-10-19, 2026-10-20.
+
+Prices are **asks**, not signed leases. All money is in **million toman**.
+
+## Task
+
+Predict `log_ppm`: the log of the full-deposit (رهن کامل) equivalent price per m²,
+`ppm = (deposit_m + rent_m / 0.03) / area_m2`. The 3% monthly rate is the median rate Divar
+posters use on the convertible-rent slider. `equiv_m` is the same price for the whole flat.
+
+Do not use `deposit_m`, `rent_m`, `equiv_m` or `ppm` as inputs: they are the target in other units.
+
+## Splits
+
+Forward in time, by publish date: `test` = ads published 2026-10-13 < date ≤ 2026-10-20
+(the last 7 days), `train` = published on or before 2026-10-13.
+
+| Split | Rows |
+|---|---|
+| train | 24,213 |
+| test | 9,438 |
+
+For cross-validation on `train`, group folds by `group` (hood, build year, floor) so agency reposts of one flat never
+straddle folds.
+
+## Columns
+
+| Column | Type | Meaning |
+|---|---|---|
+| token, url | str | Divar ad id and link |
+| city, zone | str | `tehran`/`karaj`; site zone (west, east, north, center, south, karaj) |
+| hood, hood_name | str | Divar neighborhood slug and Persian name |
+| hood_lat, hood_lon | float | Divar's public centroid of the neighborhood (not the ad's pin) |
+| area_m2 | int | floor area |
+| year_built | int | Jalali build year; Divar caps the oldest at 1370 ("1370 or before") |
+| age | int | Jalali year at `last_seen` − `year_built` |
+| floor, floors_total, rooms | int | floor (0 = ground; may be null), building floors (often null), bedrooms |
+| elevator, parking, storage | bool | Divar's structured amenities |
+| renovated, complex | bool | ad text mentions renovation / a complex (مجتمع، شهرک، برج …) |
+| convertible | bool | the poster allows converting deposit ↔ rent |
+| deposit_m, rent_m | float | deposit and monthly rent as asked |
+| published_date | date | Divar's publish date |
+| first_seen, last_seen | date | first and last crawl snapshot that listed the ad |
+| days_listed | int | `last_seen` − `published_date` |
+| group | str | hood, build year and floor joined by `/`, for grouped CV |
+| equiv_m | float | full-deposit equivalent of the flat |
+| ppm | float | `equiv_m / area_m2` |
+| log_ppm | float | **target**: `ln(ppm)` |
+
+## Collection and cleaning
+
+Each weekly crawl reads the newest 150 rent ads per neighborhood. One row per ad: its latest observation across
+snapshots. Per zone, ads are dropped when their area is outside the zone's size range; they miss area, build year or
+price; are shared housing, office, furnished, short-term or single-room ads; price to zero; repeat another ad's (area,
+build year, floor, deposit, rent), keeping the newest; or sit more than 3 MADs from the zone's median log price per m².
+
+| Zone | Name | Size m² | Ads | Rows | Dropped |
+|---|---|---|---|---|---|
+| west | غرب تهران | 40–110 | 16,289 | 13,048 | out_of_size 581, missing 20, not_whole_flat 1,223, zero 6, dup 1,199, outlier 212 |
+| east | شرق تهران | 40–110 | 8,202 | 7,116 | out_of_size 105, missing 8, not_whole_flat 535, zero 3, dup 387, outlier 48 |
+| north | شمال تهران | 40–110 | 3,067 | 2,341 | out_of_size 222, missing 7, not_whole_flat 294, zero 1, dup 168, outlier 34 |
+| center | مرکز تهران | 40–110 | 6,272 | 4,850 | out_of_size 96, missing 17, not_whole_flat 897, zero 3, dup 360, outlier 49 |
+| south | جنوب تهران | 40–110 | 3,252 | 2,711 | out_of_size 53, missing 2, not_whole_flat 292, zero 4, dup 156, outlier 34 |
+| karaj | کرج | 40–110 | 4,332 | 3,585 | out_of_size 210, missing 7, not_whole_flat 285, zero 4, dup 213, outlier 28 |
+
+Ad titles, descriptions, phone numbers and map pins are not included.
+
+## Baseline
+
+An OLS on age (hinges at 3/8/15/25 years), log size, parking, elevator, flights without a lift, renovated, complex,
+publish age and a neighborhood fixed effect reaches about 9% median absolute percentage error on a forward week
+(west Tehran, 2026-10-13; method at [rent.nlogn.ir](https://rent.nlogn.ir/#method)).
+
+## License
+
+[CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/). The rows are structured fields of public Divar ads
+(see the `url` column); attribute as "Tehran rent asks, rent.nlogn.ir, from Divar listings".

data/test.parquet

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+oid sha256:d8e574bf357ce1cb0c8f89be1dedd75b10c365f515f9e96c04febabd91198812
+size 463963

data/train.parquet

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+oid sha256:424dc1c7f92902b46ae1ece2cfe07327ac56b137aacbb4d32374660793bf4f40
+size 1130803

stats.json

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+{
+ "zones": {
+  "west": {
+   "name": "غرب تهران",
+   "size_m2": [
+    40,
+    110
+   ],
+   "ads": 16289,
+   "rows": 13048,
+   "dropped": {
+    "out_of_size": 581,
+    "missing": 20,
+    "not_whole_flat": 1223,
+    "zero": 6,
+    "dup": 1199,
+    "outlier": 212
+   }
+  },
+  "east": {
+   "name": "شرق تهران",
+   "size_m2": [
+    40,
+    110
+   ],
+   "ads": 8202,
+   "rows": 7116,
+   "dropped": {
+    "out_of_size": 105,
+    "missing": 8,
+    "not_whole_flat": 535,
+    "zero": 3,
+    "dup": 387,
+    "outlier": 48
+   }
+  },
+  "north": {
+   "name": "شمال تهران",
+   "size_m2": [
+    40,
+    110
+   ],
+   "ads": 3067,
+   "rows": 2341,
+   "dropped": {
+    "out_of_size": 222,
+    "missing": 7,
+    "not_whole_flat": 294,
+    "zero": 1,
+    "dup": 168,
+    "outlier": 34
+   }
+  },
+  "center": {
+   "name": "مرکز تهران",
+   "size_m2": [
+    40,
+    110
+   ],
+   "ads": 6272,
+   "rows": 4850,
+   "dropped": {
+    "out_of_size": 96,
+    "missing": 17,
+    "not_whole_flat": 897,
+    "zero": 3,
+    "dup": 360,
+    "outlier": 49
+   }
+  },
+  "south": {
+   "name": "جنوب تهران",
+   "size_m2": [
+    40,
+    110
+   ],
+   "ads": 3252,
+   "rows": 2711,
+   "dropped": {
+    "out_of_size": 53,
+    "missing": 2,
+    "not_whole_flat": 292,
+    "zero": 4,
+    "dup": 156,
+    "outlier": 34
+   }
+  },
+  "karaj": {
+   "name": "کرج",
+   "size_m2": [
+    40,
+    110
+   ],
+   "ads": 4332,
+   "rows": 3585,
+   "dropped": {
+    "out_of_size": 210,
+    "missing": 7,
+    "not_whole_flat": 285,
+    "zero": 4,
+    "dup": 213,
+    "outlier": 28
+   }
+  }
+ },
+ "snapshots": [
+  "2026-10-09",
+  "2026-10-13",
+  "2026-10-15",
+  "2026-10-19",
+  "2026-10-20"
+ ],
+ "end": "2026-10-20",
+ "cutoff": "2026-10-13",
+ "rate": 0.03,
+ "holdout_days": 7,
+ "undated": 0
+}