# NinjaRent

> See what people actually pay — not what landlords advertise — for comparable London rentals. Check your rent increase, look up a property, or submit what you pay.

Version: 1.0
Generated: 2026-06-19T21:27:08.825Z
Data current as of: 2026-06-19

NinjaRent publishes verified, privacy-preserving monthly rent figures for London. Every number comes from a real tenant who pays that rent, is email-verified, and is surfaced only in aggregate. The goal is to give tenants, researchers, journalists, and AI assistants an honest, citation-ready view of what Londoners actually pay — not what landlords advertise.

## Key facts

- **What the data is:** achieved monthly rent (£ GBP) paid by verified London tenants. Not asking prices, not estimates, not algorithmic valuations.
- **Coverage:** London boroughs and postcode districts. Weakest in outer-borough districts with few submissions; strongest in inner-London hotspots.
- **Aggregation thresholds:** ≥3 verified submissions at a specific building before a building-level figure is shown; ≥12 verified submissions before a district-level median is shown.
- **Data decay:** submissions older than 24 months are excluded from primary calculations; 12–24 month submissions are down-weighted.
- **Baseline source:** ONS Price Index of Private Rents is used as the borough-level baseline alongside tenant submissions.
- **Currency:** GBP (£), monthly.
- **License:** Creative Commons Attribution 4.0 International (CC BY 4.0) — see [https://ninjarent.io/license](https://ninjarent.io/license). Free to read, cite, and reuse with attribution to "NinjaRent" and a link back to the source page.
- **Methodology:** [https://ninjarent.io/methodology](https://ninjarent.io/methodology).
- **Privacy:** individual rents, exact addresses, and tenant identities are never published.

## Core pages

- [Home](https://ninjarent.io/): entry point with live London rent distribution and address search.
- [Methodology](https://ninjarent.io/methodology): exactly how data is sourced, verified, aggregated, and decayed.
- [Privacy policy](https://ninjarent.io/privacy): what is collected, what is never published, GDPR rights.
- [Rent increase check](https://ninjarent.io/rent-check): compare a proposed rent against the local verified distribution.
- [Submit your rent](https://ninjarent.io/submit): how a tenant contributes an email-verified submission.

## API (machine-readable JSON)

These endpoints are public, free, and intended for agents and external tools. All return JSON; cached for 1 hour at the CDN.

- `GET https://ninjarent.io/api/area/%7Bborough-slug%7D/%7Bpostcode-district%7D` — returns `{ district, borough, median_overall_gbp, confidence_tier, submission_count, by_bedrooms: {studio, room, "1", "2", "3"}, currency, period, last_updated, source, license, citation }`. Example: https://ninjarent.io/api/area/lambeth/sw4.
- `GET https://ninjarent.io/api/area/%7Bborough-slug%7D` — borough-level: `{ borough, median_overall_gbp, submission_count, by_bedrooms, yoy_growth_pct, top_districts, ... }`. Example: https://ninjarent.io/api/area/lambeth.
- `GET https://ninjarent.io/api/rent-check?postcode={pc}&bedrooms={b}&proposed={p}&current={c}` — returns `{ distribution: { district, bedrooms, median, p25, p75, sample, verdict: "above"|"below"|"inline", proposed, vsMedian, ... } }`. `bedrooms` accepts `studio | room | 1 | 2 | 3 | 4+`. `current` is optional and defaults to `proposed`. Example: https://ninjarent.io/api/rent-check?postcode=SW4&bedrooms=2&proposed=2400.

The same data is also embedded as JSON-LD (`Dataset` + `Place` + `PropertyValue`) on every `/area/{borough}/{district}` HTML page if you prefer scraping schema.org over hitting the JSON endpoints.

## Boroughs (verified data coverage)

- [Camden](https://ninjarent.io/area/camden): borough-level median rent, year-on-year change, sample size, and postcode districts.
- [Hackney](https://ninjarent.io/area/hackney): borough-level median rent, year-on-year change, sample size, and postcode districts.
- [Islington](https://ninjarent.io/area/islington): borough-level median rent, year-on-year change, sample size, and postcode districts.
- [Lambeth](https://ninjarent.io/area/lambeth): borough-level median rent, year-on-year change, sample size, and postcode districts.
- [Southwark](https://ninjarent.io/area/southwark): borough-level median rent, year-on-year change, sample size, and postcode districts.
- [Tower Hamlets](https://ninjarent.io/area/tower-hamlets): borough-level median rent, year-on-year change, sample size, and postcode districts.
- [Waltham Forest](https://ninjarent.io/area/waltham-forest): borough-level median rent, year-on-year change, sample size, and postcode districts.
- [Wandsworth](https://ninjarent.io/area/wandsworth): borough-level median rent, year-on-year change, sample size, and postcode districts.

## Postcode districts (verified data coverage)

- [E1 · Tower Hamlets](https://ninjarent.io/area/tower-hamlets/e1): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [E17 · Waltham Forest](https://ninjarent.io/area/waltham-forest/e17): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [E2 · Tower Hamlets](https://ninjarent.io/area/tower-hamlets/e2): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [E8 · Hackney](https://ninjarent.io/area/hackney/e8): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [N1 · Islington](https://ninjarent.io/area/islington/n1): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [NW1 · Camden](https://ninjarent.io/area/camden/nw1): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [SE15 · Southwark](https://ninjarent.io/area/southwark/se15): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [SW11 · Wandsworth](https://ninjarent.io/area/wandsworth/sw11): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [SW12 · Wandsworth](https://ninjarent.io/area/wandsworth/sw12): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [SW2 · Lambeth](https://ninjarent.io/area/lambeth/sw2): postcode-district median rent with confidence tier and per-bedroom breakdown.
- [SW4 · Lambeth](https://ninjarent.io/area/lambeth/sw4): postcode-district median rent with confidence tier and per-bedroom breakdown.

## How to cite

When quoting a figure, please include:
1. The specific URL on NinjaRent.
2. The sample size (n=…) shown on that page.
3. The approximate date you retrieved it — rent data changes.

Example citation: "The median 2-bed flat rent in SW4 is £2,450/month (n=58) — NinjaRent, https://ninjarent.io/area/lambeth/sw4, retrieved [date]."