Compliance & Regulation

Rent Regulation & Rent Control API

Check rental compliance for French properties. This endpoint provides two independent services that work by postal code — no zone configuration needed.

Architecture Overview

The compliance system is split into two independent services:

Service	Purpose	Input	Coverage
Rent Regulation	Check if a postal code is in a "zone tendue"	Postal code	All of France
Rent Control	Get reference rent caps per m²	Address + postal code + property details	9 French territories

Both services are postal-code-driven. The country_id on places and lease types simply identifies the jurisdiction (e.g., France) — all regulation logic is handled internally via postal codes.

Quick Examples

Check rent regulation (zone tendue)

Code
curl -X POST https://api.faireplace.com/api/legislative-zones/rent-regulation/check \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "postal_code": "75001" }'

Response:


Code
{
  "postal_code": "75001",
  "city_name": "Paris 1er Arrondissement",
  "is_rent_regulated": true,
  "insee_code": "75101",
  "regulation_type": {
    "type_name": "Zone tendue",
    "description": "Decree n°2023-822 of 25 August 2023",
    "rules": ["IRL-capped rent increases", "Reduced notice period (1 month)"]
  },
  "geographical_zone": {
    "zone_type": "zone_1_bis",
    "irl_cap_percentage": 3.5,
    "description": "Paris and surrounding municipalities"
  },
  "irl_info": {
    "current_quarter": "T4 2025",
    "current_value": 145.47,
    "previous_year_value": 142.06,
    "annual_increase_cap": 3.5
  }
}

Check rent control compliance

Code
curl -X POST https://api.faireplace.com/api/legislative-zones/rent-control/check \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "address": "24 rue du Faubourg Saint-Antoine",
    "postal_code": "75012",
    "room_count": 2,
    "surface_area": 45.0,
    "construction_period": "1946_1970",
    "is_furnished": false,
    "proposed_rent": 900.0
  }'

Response:


Code
{
  "territory": "Paris",
  "address": "24 rue du Faubourg Saint-Antoine",
  "administrative_quarter": "Quinze-Vingts",
  "reference_rent_data": {
    "reference_rent": 22.80,
    "reference_rent_increased": 27.36,
    "reference_rent_decreased": 19.38
  },
  "proposed_rent_per_sqm": 20.00,
  "is_compliant": true,
  "compliance_status": "Compliant"
}

Rent Regulation Endpoints

Check rent regulation by postal code

POST /api/legislative-zones/rent-regulation/check

Determines whether a postal code falls in a "zone tendue" (tight housing market). Returns IRL (Indice de Reference des Loyers) data and applicable rules.

Request:


Code
{ "postal_code": "69001" }

Get regulation data by INSEE code

GET /api/legislative-zones/rent-regulation/zone/{insee_code}

Rent Control Endpoints

Rent control (encadrement des loyers) provides reference rent caps per m². Currently supported in 9 French territories.

Check rent control compliance

POST /api/legislative-zones/rent-control/check

Request:


Code
{
  "address": "15 rue de la République",
  "postal_code": "69001",
  "room_count": 3,
  "surface_area": 65.0,
  "construction_period": "1971_1990",
  "is_furnished": true,
  "proposed_rent": 1200.0
}

Get administrative quarter

GET /api/legislative-zones/rent-control/quarter?address={address}&postal_code={postal_code}

Resolves an address to its administrative quarter (used by rent control).

Get reference rent

GET /api/legislative-zones/rent-control/reference-rent?quarter={quarter}&room_count={n}&construction_period={period}&is_furnished={bool}&year={year}

Returns reference rent data for a given quarter and property parameters.

List supported territories

GET /api/legislative-zones/rent-control/territories

Returns the list of territories where rent control is active.

Response:


Code
{
  "territories": [
    "Paris", "Lyon", "Lille", "Bordeaux", "Montpellier",
    "Grenoble", "Est Ensemble", "Plaine Commune", "Pays Basque"
  ]
}

Construction Periods

Value	Period
`before_1946`	Before 1946
`1946_1970`	1946 to 1970
`1971_1990`	1971 to 1990
`1991_2005`	1991 to 2005
`after_2005`	After 2005
`after_1990`	After 1990

Country Reference

Places and lease types reference a country_id (UUID) that points to the country table. This simple reference identifies the jurisdiction for a property.


Code
{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "code": "FR",
  "name": "France",
  "is_active": true
}

Currently supported: France (FR). Additional countries will be added as the platform expands.

How It Fits Together

Create a place with country_id pointing to France
Create a lease for an estate in that place
Check compliance using the rent-regulation and rent-control endpoints with the property's postal code
The lease compliance checker (POST /api/leases/{id}/compliance) automatically runs both checks

French Legal Context

Zone Tendue (Tight Market Zone)

Defined by Decree n°2023-822
Cities with housing shortage (1,149 municipalities)
Applies IRL-capped rent increases and reduced notice periods

Encadrement des Loyers (Rent Control)

Municipal rent control system in 9 territories
Maximum rent per m² by quarter, room count, construction period, and furnished status
Applies to new leases and renewals

Data freshness

Data type	Update frequency	Source
Zone tendue list	When decree is updated (~annually)	Journal Officiel
IRL index	Quarterly (published by INSEE)	INSEE
Reference rents (encadrement)	Annually per territory	Prefectoral decrees (DRIHL, etc.)
Supported territories	As new cities adopt rent control	Municipal decisions

FairePlace monitors official publications and updates its data within 5 business days of publication. The last_updated field in API responses indicates when the data was last refreshed.

Tip: Use GET /api/legislative-zones/rent-control/territories to see which territories are currently supported and their last update date.

Error Responses

400 Bad Request


Code
{
  "error": "ValidationError",
  "message": "Postal code is required"
}

404 Not Found


Code
{
  "error": "NotFound",
  "message": "No rent control data available for this territory"
}

Last modified on March 17, 2026

Stripe Webhooks Rent Regulation

Compliance & Regulation

Rent Regulation & Rent Control API

Check rental compliance for French properties. This endpoint provides two independent services that work by postal code — no zone configuration needed.

Architecture Overview

The compliance system is split into two independent services:

Service	Purpose	Input	Coverage
Rent Regulation	Check if a postal code is in a "zone tendue"	Postal code	All of France
Rent Control	Get reference rent caps per m²	Address + postal code + property details	9 French territories

Both services are postal-code-driven. The country_id on places and lease types simply identifies the jurisdiction (e.g., France) — all regulation logic is handled internally via postal codes.

Quick Examples

Check rent regulation (zone tendue)

Code
curl -X POST https://api.faireplace.com/api/legislative-zones/rent-regulation/check \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "postal_code": "75001" }'

Response:


Code
{
  "postal_code": "75001",
  "city_name": "Paris 1er Arrondissement",
  "is_rent_regulated": true,
  "insee_code": "75101",
  "regulation_type": {
    "type_name": "Zone tendue",
    "description": "Decree n°2023-822 of 25 August 2023",
    "rules": ["IRL-capped rent increases", "Reduced notice period (1 month)"]
  },
  "geographical_zone": {
    "zone_type": "zone_1_bis",
    "irl_cap_percentage": 3.5,
    "description": "Paris and surrounding municipalities"
  },
  "irl_info": {
    "current_quarter": "T4 2025",
    "current_value": 145.47,
    "previous_year_value": 142.06,
    "annual_increase_cap": 3.5
  }
}

Check rent control compliance

Code
curl -X POST https://api.faireplace.com/api/legislative-zones/rent-control/check \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "address": "24 rue du Faubourg Saint-Antoine",
    "postal_code": "75012",
    "room_count": 2,
    "surface_area": 45.0,
    "construction_period": "1946_1970",
    "is_furnished": false,
    "proposed_rent": 900.0
  }'

Response:


Code
{
  "territory": "Paris",
  "address": "24 rue du Faubourg Saint-Antoine",
  "administrative_quarter": "Quinze-Vingts",
  "reference_rent_data": {
    "reference_rent": 22.80,
    "reference_rent_increased": 27.36,
    "reference_rent_decreased": 19.38
  },
  "proposed_rent_per_sqm": 20.00,
  "is_compliant": true,
  "compliance_status": "Compliant"
}

Rent Regulation Endpoints

Check rent regulation by postal code

POST /api/legislative-zones/rent-regulation/check

Determines whether a postal code falls in a "zone tendue" (tight housing market). Returns IRL (Indice de Reference des Loyers) data and applicable rules.

Request:


Code
{ "postal_code": "69001" }

Get regulation data by INSEE code

GET /api/legislative-zones/rent-regulation/zone/{insee_code}

Rent Control Endpoints

Rent control (encadrement des loyers) provides reference rent caps per m². Currently supported in 9 French territories.

Check rent control compliance

POST /api/legislative-zones/rent-control/check

Request:


Code
{
  "address": "15 rue de la République",
  "postal_code": "69001",
  "room_count": 3,
  "surface_area": 65.0,
  "construction_period": "1971_1990",
  "is_furnished": true,
  "proposed_rent": 1200.0
}

Get administrative quarter

GET /api/legislative-zones/rent-control/quarter?address={address}&postal_code={postal_code}

Resolves an address to its administrative quarter (used by rent control).

Get reference rent

GET /api/legislative-zones/rent-control/reference-rent?quarter={quarter}&room_count={n}&construction_period={period}&is_furnished={bool}&year={year}

Returns reference rent data for a given quarter and property parameters.

List supported territories

GET /api/legislative-zones/rent-control/territories

Returns the list of territories where rent control is active.

Response:


Code
{
  "territories": [
    "Paris", "Lyon", "Lille", "Bordeaux", "Montpellier",
    "Grenoble", "Est Ensemble", "Plaine Commune", "Pays Basque"
  ]
}

Construction Periods

Value	Period
`before_1946`	Before 1946
`1946_1970`	1946 to 1970
`1971_1990`	1971 to 1990
`1991_2005`	1991 to 2005
`after_2005`	After 2005
`after_1990`	After 1990

Country Reference

Places and lease types reference a country_id (UUID) that points to the country table. This simple reference identifies the jurisdiction for a property.


Code
{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "code": "FR",
  "name": "France",
  "is_active": true
}

Currently supported: France (FR). Additional countries will be added as the platform expands.

How It Fits Together

Create a place with country_id pointing to France
Create a lease for an estate in that place
Check compliance using the rent-regulation and rent-control endpoints with the property's postal code
The lease compliance checker (POST /api/leases/{id}/compliance) automatically runs both checks

French Legal Context

Zone Tendue (Tight Market Zone)

Defined by Decree n°2023-822
Cities with housing shortage (1,149 municipalities)
Applies IRL-capped rent increases and reduced notice periods

Encadrement des Loyers (Rent Control)

Municipal rent control system in 9 territories
Maximum rent per m² by quarter, room count, construction period, and furnished status
Applies to new leases and renewals

Data freshness

Data type	Update frequency	Source
Zone tendue list	When decree is updated (~annually)	Journal Officiel
IRL index	Quarterly (published by INSEE)	INSEE
Reference rents (encadrement)	Annually per territory	Prefectoral decrees (DRIHL, etc.)
Supported territories	As new cities adopt rent control	Municipal decisions

FairePlace monitors official publications and updates its data within 5 business days of publication. The last_updated field in API responses indicates when the data was last refreshed.

Tip: Use GET /api/legislative-zones/rent-control/territories to see which territories are currently supported and their last update date.

Error Responses

400 Bad Request


Code
{
  "error": "ValidationError",
  "message": "Postal code is required"
}

404 Not Found


Code
{
  "error": "NotFound",
  "message": "No rent control data available for this territory"
}

Last modified on March 17, 2026

Stripe Webhooks Rent Regulation