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Municipality profile · department 02

Property in Laon

In Laon (02), the median price per m² stands at €1,181/m² (DVF 2025 release).

Median price per m² in 2025
€1,181/m²
+2.3% over one year
Sales in 2025
264
+14.8% over one year
flats and houses
Population
24,220
-4.3% since 2012
Median living standard
€19,870
per year per consumption unit

Public data cross-referenced (DGFiP, INSEE, ADEME), recorded on October 4, 2026.

The municipality has 24,220 inhabitants, a change of -2.6% ; median living standard there reaches €19,870 a year.

Prices and sales

In 2025, a dwelling in Laon sold at a median price of €1,181/m², +2.3% over one year.

Median price per m² over time in Laon

Median price per m² in LaonFlat: 842 in 2014, 1,132 in 2025 ; House: 1,149 in 2014, 1,267 in 20258001,0001,200201520172019202120232025€1,267/m²€1,132/m²
FlatHouse
Median price per square metre of recorded sales, by property type and by year.

Over 11 years, the median flat price has changed by +34.5%.

View the data
Median price per m² by property type
YearFlatHouseSales included
2014€842/m²€1,149/m²161
2015€857/m²€1,148/m²172
2016€833/m²€1,106/m²184
2017€979/m²€1,160/m²200
2018€851/m²€1,190/m²204
2019€867/m²€1,189/m²249
2020€930/m²€1,178/m²279
2021€1,024/m²€1,166/m²295
2022€1,064/m²€1,327/m²296
2023€1,077/m²€1,257/m²263
2024€1,111/m²€1,170/m²229
2025€1,132/m²€1,267/m²264

Source: DVF (DGFiP), land value request data · recorded on October 4, 2026

Number of sales per year in Laon

Sales of flats and houses recorded each year. This is the market's thermometer: a price is only meaningful if sales are actually completed.

264 sales in 2025, +14.8% compared with 2024 (230). The peak of the period remains 2022, with 297 sales.

View the data
Sales and median price by year
YearSalesMedian price per m²Total sales value
2016184€989/m²€15.0M
2017200€1,053/m²€17.6M
2018204€1,038/m²€17.2M
2019250€1,043/m²€21.1M
2020280€1,087/m²€24.8M
2021295€1,102/m²€28.3M
2022297€1,191/m²€29.9M
2023264€1,173/m²€24.4M
2024230€1,153/m²€21.8M
2025264€1,181/m²€24.9M

Source: DVF (DGFiP), land value request data · recorded on October 4, 2026

Median price per m² in 2025€1,181/m²
Flat — median price per m²€1,132/m²
House — median price per m²€1,267/m²
Sales in 2025264
Average of the previous five years273
Total sales value in 2025€24.9M
Sales recorded over ten years2,801
Median price per m² by energy rating (EPC/DPE)
EPC bandMedian price per m²Sales
C€1,128/m²440
D€1,120/m²467
E€1,104/m²279
F€979/m²99

Read with caution. These sales are not comparable with one another: poorly rated dwellings are often old and well located, in town centres, which can make them more expensive per square metre than recent dwellings on the outskirts. The gap therefore measures the commune's housing stock, not the "premium" of a good EPC (DPE) for an otherwise identical property.

How to read these figures. The median price splits the market in two: half of sales were made below it, half above. It withstands the few extreme sales that distort a small commune better than the average does.

The data come from DVF, the file of sales actually recorded by notaries, not from advertised prices, which are asking prices rather than agreed ones. Only sales of a flat or a house with a known floor area are counted. DVF does not cover Alsace-Moselle, which is governed by the land register (livre foncier).

Source: DVF (DGFiP) · recorded on October 4, 2026

Rents

Reference rents (2025)

Median advertised rent per m² by property type in Laon, 2025
Property typeMedian rent (€/m²)Range (€/m²)
Flats, all sizes10.38.2 – 13.0
Flats with 1-2 rooms12.29.8 – 15.2
Flats with 3 or more rooms9.17.2 – 11.5
Houses8.26.8 – 10.0

How to read this table. This is a predicted advertised rent, including service charges, per square metre per month — not the rent signed in the lease. The range brackets the estimate: most listings in the municipality fall within it. These estimates are recalculated every year with a new model, so two releases cannot be compared with each other.

Estimations ANIL, à partir des données du Groupe SeLoger et de leboncoin · Rent map 2025

Energy performance of the housing stock

Breakdown of homes in Laon by energy performance certificate (EPC) band. Since the loi Climat & Résilience (Climate and Resilience Act), it is this band that determines whether a home may be let.

Breakdown of energy performance certificates in Laon

  • A270.3%
  • B420.5%
  • C2,30925.7%
  • D3,73741.7%
  • E1,89321.1%
  • F6917.7%
  • G2733.0%

8,972 homes surveyed. 10.7% of the surveyed housing stock is rated F or G — that is 964 homes already affected, or about to be, by the letting ban. Including band E, targeted for 2034, the share rises to 31.8%.

Rental ban timeline
  1. 2025Gbanned
  2. 2028Fbanned
  3. 2034Ebanned

2021 loi Climat & Résilience (Climate and Resilience Act) — applies to new leases.

Counts and shares by band, across all energy surveys recorded in the municipality.

Source: ADEME, energy performance certificate database · recorded on October 4, 2026

Change in EPC (DPE) assessments in Laon

Change in EPC (DPE) assessments in LaonA, B and C labels: 27 in 2022, 19 in 2025 ; F and G labels: 17 in 2022, 6.3 in 2025020202220232024202519%6.3%
A, B and C labelsF and G labels
Among the assessments carried out each year: the share of well-rated dwellings (A, B, C) and that of thermal sieves (F, G).

The share of F and G labels among assessments is falling: 16.7% in 2022, 6.3% in 2025.

View the data
Assessments carried out by year and by band
YearABCDEFGTotal
202215275347251114621,055
2023213460390343160621,439
202431259187035690451,967
20252154851,345614133322,626
2026*07453694240107221,523

* current year, incomplete

Source: ADEME, energy performance certificate database · recorded on October 4, 2026

Why this breakdown matters. A dwelling rated G can no longer be let under a new lease since 1st January 2025; F will follow in 2028 and E in 2034. A commune whose stock is largely rated F or G therefore faces a wall of renovation work, or an exit from the rental market.

Note: these figures cover surveyed homes, not the entire stock. A survey is only required on sale or letting, so homes occupied for a long time are under-represented.

The trend line starts in 2022: the assessment changed its calculation method in July 2021, and earlier labels cannot be compared with later ones. It describes the dwellings assessed during the year (those being sold, let or just renovated), not an annual census of the housing stock.

Housing stock

Laon has 13,540 dwellings at the 2023 census, of which 87.1% are main residences; the rest is split between second homes and vacant dwellings.

What are dwellings used for?

Housing categories in LaonMain residences : 87.0%Second homes and occasional dwellings : 1.8%Vacant dwellings : 11.2%
  • Main residences87.0%
  • Second homes and occasional dwellings1.8%
  • Vacant dwellings11.2%
A vacant dwelling is one unoccupied on the census date: awaiting sale, letting or works, or simply left empty.

Source: INSEE, census

Who lives in main residences?

Housing tenure of residents of LaonTenants : 65.1%Owner-occupiers : 33.3%Housed free of charge : 1.6%
  • Tenants14,60265.1%
  • Owner-occupiers7,46133.3%
  • Housed free of charge3511.6%
Share of RESIDENTS according to whether their household owns, rents or is housed free of charge, not the share of dwellings.

Source: INSEE, census

Between 2012 and 2023, the housing stock grew by +0.7% while the population changed by -4.3%: homes are being built faster than the commune gains residents, a sign of smaller households, second homes or rising vacancy.

Dwellings (2023)13,540
Households11,798
Housing: Laon compared with its département, its region and France
LaonAisneHauts-de-FranceFrance
Main residences202387.0%+4.6 pts vs France86.7%88.6%82.4%
Second homes20231.8%−8.0 pts vs France3.4%4.0%9.8%
Vacant dwellings202311.2%+3.4 pts vs France9.9%7.4%7.8%
Residents who own their home33.3%−27.5 pts vs France63.9%60.3%60.8%
Tenant residents65.1%+27.7 pts vs France34.5%38.3%37.4%

Under each value for the municipality: its gap with France. For a rate, the gap is in percentage points (12.4% vs 7.8% = +4.6 pts); for an amount or a ratio, as a percentage of the national value.

Long-term empty dwellings

Private dwellings vacant for more than two years (2025)469
Share of private housing stock5.6%

Why vacancy of more than two years. A dwelling that stands empty for a few months is waiting for a buyer, a tenant or the end of building work: that is the normal breathing of the market. Empty for more than two years, it has left the market — a run-down property, a blocked inheritance, an owner who will neither let nor sell. We do not publish total vacancy from the same file: its national level varies by a third from one year to the next without the housing stock having changed, which rules out any comparison.

Source: LOVAC (Cerema, DGFiP), vacant dwellings in the private housing stock · recorded on October 4, 2026

Dwellings authorised for construction in Laon

Dwellings for which a building permit has been granted, by year of authorisation. An authorised dwelling is not yet built: allow two to three years before delivery.
View the data
Dwellings authorised by year
YearFlats (multi-dwelling buildings)Detached housesTotal
2021541064
202288795
20231407147
20247714
202536440
2026*12113

Source: Sit@del, ministry responsible for housing · recorded on October 4, 2026

Sources: INSEE (census), Sit@del · recorded on October 4, 2026

Population and households

Population24,220
Households11,798
People per household2.05

Change in the population of Laon

Population trendPopulation: 26 k in 1968, 24 k in 202324 k26 k28 k1968198219992012202324 k inhab.
Municipal population at each census. INSEE does not publish a population every year: the points are the census years available.

Between 2012 and 2023, the population changed by -4.3%.

Source: INSEE, population census · recorded on October 4, 2026

Age breakdown

Age breakdown of the population of LaonUnder 18 : 19.0%18 to 24 : 10.6%25 to 29 : 6.3%30 and over : 64.1%
  • Under 184,51619.0%
  • 18 to 242,51110.6%
  • 25 to 291,5026.3%
  • 30 and over15,21864.1%
Population aged 2 and over, 2023 census.

Source: INSEE

What do people aged 15 and over do?

Employment status of residents aged 15 and over in LaonEmployed workers : 40.0%Unemployed : 10.8%Retired people : 27.6%Pupils and students : 8.0%Other economically inactive : 13.7%
  • Employed workers8,08240.0%
  • Unemployed2,17710.8%
  • Retired people5,57827.6%
  • Pupils and students1,6108.0%
  • Other economically inactive2,76413.7%
Each resident aged 15 or over is counted once, 2023 census.

Source: INSEE

Laon compared with its département, its region and France
LaonAisneHauts-de-FranceFrance
Population trend2012-2023-4.3%−8.7 pts vs France-3.2%+0.3%+4.4%
Median age202340.9 years−1.6 yr vs France43.4 years40.8 years42.5 years
Share aged under 25202331.0%+2.2 pts vs France29.0%31.0%28.8%
Share aged 65 and over202320.5%−0.8 pt vs France22.0%19.4%21.3%
People per household20232.0−6% vs France2.22.32.2

Under each value for the municipality: its gap with France. For a rate, the gap is in percentage points (12.4% vs 7.8% = +4.6 pts); for an amount or a ratio, as a percentage of the national value.

Why the number of people per household matters. A household is everyone who shares the same dwelling. The fewer people it has, the more demand shifts towards small homes — studios and one-bedroom flats, sought by people living alone, students and retirees; the more it has, the more demand shifts towards family homes with three or more rooms.

In Laon, a household has 2.05 people on average, compared with 2.17 in France: more people living alone and couples without children, so demand leans more towards small units.

Source: INSEE, population census · recorded on October 4, 2026

Income and employment

Income and employment: Laon compared with its département, its region and France
LaonAisneHauts-de-FranceFrance
Median living standard (per year)2023€19,870−23% vs France€23,360€23,950€25,920
Poverty rate202331.9%+16.0 pts vs France19.4%19.0%15.9%
Unemployment rate (aged 15-64)202321.4%+10.4 pts vs France15.3%13.8%11.0%
Activity rate (aged 15-64)202366.3%−9.4 pts vs France74.0%73.3%75.7%
Share of retired people (aged 15 and over)202327.6%−0.5 pt vs France30.3%26.8%28.1%
Share of pupils and students (aged 15 and over)20238.0%≈ France6.3%8.1%7.6%

Under each value for the municipality: its gap with France. For a rate, the gap is in percentage points (12.4% vs 7.8% = +4.6 pts); for an amount or a ratio, as a percentage of the national value.

How to read these figures. The standard of living is a household's disposable income (salaries, pensions and benefits, after tax) divided by its number of consumption units: the first adult counts as 1, other people aged 14 or over as 0.5, and each child as 0.3. It allows a single person and a family to be compared.

The poverty rate is the share of residents whose standard of living is below 60% of the national median. INSEE does not publish it for small communes, for reasons of statistical confidentiality: its absence is not a zero.

The unemployment rate here is the census one: people who declare themselves without work and looking for it, among the economically active aged 15 to 64. It is higher than INSEE's quarterly rate, which follows a stricter international definition.

Sources: INSEE (census, Filosofi) · recorded on October 4, 2026

Economic fabric

Number of businesses located in Laon

Number of businesses located in LaonBusinesses: 1,348 in 2014, 1,592 in 20241,3001,4001,5001,6002014201620182020202220241,592
Businesses in market activities, excluding agriculture, located in the commune and counted at 31 December each year. This is a stock: it shows the size of the local economy, not how much it is being renewed.

1,592 businesses in 2024, compared with 1,348 in 2014: +18.1% over the period.

View the data
Number of businesses by year
YearBusinesses
20141,348
20151,347
20161,314
20171,323
20181,324
20191,362
20201,380
20211,475
20221,503
20231,547
20241,592

Source: INSEE, business demography information system · recorded on October 4, 2026

Businesses: Laon compared with its département, its region and France
LaonAisneHauts-de-FranceFrance
Number of businesses20241,59230,539405,6146,437,729
Change in the number of businesses2019-2024+16.9%−8.1 pts vs France+20.8%+25.0%+25.0%
Businesses per 1,000 inhabitants202465.7−32% vs France58.467.797.3

Under each value for the municipality: its gap with France. For a rate, the gap is in percentage points (12.4% vs 7.8% = +4.6 pts); for an amount or a ratio, as a percentage of the national value.

In what form do businesses operate?

Legal forms of businesses in LaonSole traders : 52.4%SAS and SASU : 14.6%SARL and EURL : 11.9%Civil companies, including SCI : 18.0%Other forms : 3.2%
  • Sole traders1,59952.4%
  • SAS and SASU44514.6%
  • SARL and EURL36211.9%
  • Civil companies, including SCI55118.0%
  • Other forms973.2%
Businesses with an open establishment in Laon, by legal form. A sole trader operates in their own name — this is the status of micro-entrepreneurs; an SCI most often holds property assets rather than running an activity. This count is broader than the INSEE one above, which only includes market businesses with an economic activity.

Sources: INSEE (SIRENE register), INPI (national business register) · recorded on October 4, 2026

Registrations and insolvency proceedings

* current year, incomplete

On one side, announcements of registrations, business creations and takeovers; on the other, court-ordered safeguard, recovery and liquidation proceedings. Legal notices published under postcode 02000. A postcode may cover several communes: in a village, these figures describe the wider catchment area, not the commune alone.

From 2021 to 2025, 949 registrations for 324 insolvency proceedings.

View the data
Registrations and insolvency proceedings
YearRegistrationsInsolvency proceedings
202119159
202217841
202316946
202419774
2025214104
2026*13365

Source: BODACC, official bulletin of civil and commercial announcements · recorded on October 4, 2026

Sources: INSEE, BODACC · recorded on October 4, 2026

Local taxation

In 2024, the overall property tax rate on built properties is 65.56% in Laon.

Rate voted by the commune59.20%
Intercommunal body, syndicates and special taxes6.36%
Overall rate on built properties (total)65.56%
Overall rate on undeveloped land77.50%
Worked example

A dwelling with a cadastral rental value of €3,000 has a tax base of €1,500: the law sets it at half the rental value. In Laon, its property tax (taxe foncière) is €1,500 × 65.56% = €983 a year.

These amounts are before the collection charges retained by the State. Your property's rental value is shown on your property tax (taxe foncière) notice.

Property tax rate by year
YearCommunal rateOverall rate on built propertiesHousehold waste
202159.20%64.73%—
202259.20%64.73%—
202359.20%64.73%—
202459.20%65.56%—

Between 2021 and 2024, the overall rate changed by +0.83 point.

How to read these rates. Property tax (taxe foncière) is calculated by multiplying the property's tax base by the overall rate: this is the figure to compare between communes, not the communal rate alone. Since 2021, départements no longer collect property tax on buildings; their former share is included in the communal rate.

A high rate does not mean a high tax. The cadastral rental value is not the market rent: it is an administrative estimate based on 1970 rents, revalued each year by a national coefficient. In a town with old, low rental values, a 50% rate can cost less than a 25% rate elsewhere.

Source: DGFiP, local taxation for individuals (2024 scale) · recorded on October 4, 2026

Living environment

Services and shops in the commune

Health
General practitionerPharmacyDentistNurseAnalysis laboratoryHealth centre (maison de santé)Emergency departmentMaternity unitHousing for older people
Shops
BakeryGrocery or convenience storeSupermarketHypermarketButcher'sPetrol station
Education and early years
Nursery or early-years childcareNursery or primary schoolCollège (lower secondary school)Lycée (upper secondary school)
Services and transport
Post office or postal pointBankFrance servicesPolice or gendarmeriePassenger railway station

How to read this list. It shows the services for which at least one establishment is recorded in the commune. A service that does not appear is not necessarily absent: INSEE does not locate every facility with the same precision, and the list only includes the main ones.

Source: INSEE, permanent facilities database 2024

Public transport

111 public transport stops are located in the municipality, or 4.6 stops per 1,000 inhabitants.

Public transport stops in Laon

Map of public transport stops in Laon
  • Stops111

Outline of the commune, north at the top.

Each dot is a bus, tram, metro or train stop. The map shows where the network is dense: it says nothing about frequency of service.

Source: transport.data.gouv.fr, scheduled timetables of networks · recorded on October 4, 2026

Stops by network

  • Réseau urbain TUL93
  • Réseau interurbain - Aisne (02)17
  • Agrégat des réseaux urbains et interurbains du Grand Est1

Collèges (lower secondary schools)

Establishments4
Average exam pass rate85.3%
Average index of social position99.0
See the establishments
Establishments in the commune
EstablishmentTypeSuccess rateSocial position
COLLEGE CHARLEMAGNECollège (lower secondary school)74.0%79.0
COLLEGE JEAN MERMOZCollège (lower secondary school)83.0%94.5
COLLEGE LES FRERES LE NAINCollège (lower secondary school)86.0%102.6
COLLEGE PRIVE LA PROVIDENCECollège (lower secondary school)98.0%119.8

How to read these figures. The pass rate is that of the brevet for a collège and of the baccalauréat for a lycée. The index of social position summarises pupils' social background: the national average is close to 100, and a higher index indicates more advantaged families. Nursery and primary schools are not covered.

Source: Ministry of National Education · recorded on October 4, 2026

Fixed internet

  • Dwellings and premises connectable to fibre97.0%
    15,272 connectable out of 15,745

Connectable means that optical fibre reaches the building or the street and a subscription can be taken out, not that the dwelling is already subscribed.

Source: ARCEP, fibre rollout · situation as at June 2026

Electric cars

Of the 871 passenger cars registered in the commune in 2024:

  • Electric cars8.8%
  • Plug-in hybrids6.8%

Why this share may look high. These are cars registered during the year, not all those on the road: electric vehicles weigh far more in recent purchases than in the overall fleet. Company and rental vehicles are also registered at the company's address, which inflates the share in communes that host head offices or rental firms.

Source: Ministry of Ecological Transition, passenger car registrations · recorded on October 4, 2026

Natural and technological risks

The risks identified by the State in the territory of Laon, what they mean, and what they change for a property.

Clay shrink-swell

Medium exposurelevel 2 out of 3

Clay soil swells when wet and shrinks when it dries. These movements crack houses with shallow foundations, especially after a drought.

For a property: At this level, a soil survey is mandatory to sell a building plot and before having a house built. For an existing house, look at the cracks and ask whether a drought claim has already been filed.

Seismicity

Very lowlevel 1 out of 5

France is divided into five seismicity zones, from 1 (very low) to 5 (high, in the Antilles).

For a property: In this zone, no seismic rules apply to detached houses.

Radon potential

Low potentiallevel 1 out of 3

Radon is a natural radioactive gas that rises from granitic and volcanic soils and can build up in poorly ventilated rooms, especially on ground floors and in basements.

For a property: At this level, no particular information is required when selling or letting.

Risk prevention plans

1in the commune

The commune is covered by a prevention plan for: ground movement. This is a document issued by the prefect that delimits the exposed zones.

For a property: In the delimited zones, building or extending may be prohibited or subject to requirements. The plan does not necessarily cover the whole commune: only the risk statement provided before a sale or letting says whether the address is affected.

Classified installations (ICPE)

34in the commune

A classified installation is an activity that the law subjects to declaration or authorisation because it may cause nuisance: factory, warehouse, livestock farm, petrol station, waste recycling centre, boiler room.

For a property: Their number mainly reflects the commune's economic activity: most pose no danger to neighbours. What matters is their nature and their distance from the property.

Underground cavities

58in the commune

Former quarries, cellars, galleries or military works recorded beneath the commune.

For a property: A cavity can cause localised subsidence or collapse of the ground. Before buying, check whether the plot is close to a known cavity.

Installations and cavities recorded in Laon

Map of classified installations and underground cavities in LaonClassified installations — CARREFOURClassified installations — EUROVIA PICARDIE SASClassified installations — EUROVIAClassified installations — LE LIN FRANCAISClassified installations — LECLERC LAONDIS (ex CHAMBRY DISTRIBUTIONClassified installations — SONOCO METAL PACKAGING (ex EVIOSYS Packaging France SAS)Classified installations — LA VIANDE CHAUNOISEClassified installations — SIRTOM du LaonnoisClassified installations — ATALClassified installations — ImpressClassified installations — ARCADIEClassified installations — MULLER INTUITIVClassified installations — SAS CAILLE LOGISTIQUEClassified installations — SAS CAILLE LOGISTIQUEClassified installations — INTERMARCHE (dite Rond Point)Classified installations — Société Nouvelle HERBOUXClassified installations — MOREAU DanielClassified installations — Garage Europ Auto (SARL)Classified installations — Valor’AisneClassified installations — UNIBETONClassified installations — SODELEG (ex-SCI DU GRIFFON)Classified installations — TOTAL RAFFINAGE MARKETING (Relais Elf)Classified installations — DIANE INDUSTRIESClassified installations — TEINTURERIE DELABY VASSELETClassified installations — SEDALClassified installations — LA VIANDE CHAUNOISEClassified installations — SPA DE LAONClassified installations — SOCIETE DE DISTRIBUTION ET DE PRESTATION DE SERVICESClassified installations — NORAUTO FRANCEClassified installations — EMB AUTOMOBILEClassified installations — AUDI LAONClassified installations — SAINT MARCELClassified installations — LA HAUBETTE POIDS LOURDSClassified installations — SIRTOM DU LAONNOISUnderground cavities — Ind 1Underground cavities — Ind 2Underground cavities — Ind 3Underground cavities — Ind 4Underground cavities — Ind 5Underground cavities — Ind 6Underground cavities — Ind 7Underground cavities — Ind 8Underground cavities — Ind 9Underground cavities — Ind 10Underground cavities — Ind 11Underground cavities — Ind 12Underground cavities — Ind 13Underground cavities — Ind 14Underground cavities — Ind 15Underground cavities — Ind 16Underground cavities — Ind 17Underground cavities — Ind 18Underground cavities — Ind 19Underground cavities — Ind 20Underground cavities — Ind 21Underground cavities — Ind 22Underground cavities — Ind 23Underground cavities — Ind 24Underground cavities — Ind 25Underground cavities — Ind 26Underground cavities — Ind 27Underground cavities — Ind 28Underground cavities — Ind 29Underground cavities — Ind 30Underground cavities — Ind 31Underground cavities — Ind 32Underground cavities — Ind 33Underground cavities — Ind 34Underground cavities — Ind 35Underground cavities — Ind 36Underground cavities — Ind 37Underground cavities — Ind 38Underground cavities — Ind 39Underground cavities — Ind 40Underground cavities — Ind 41Underground cavities — Ind 42Underground cavities — Ind 43Underground cavities — Ind 44Underground cavities — Ind 45Underground cavities — Ind 46Underground cavities — Ind 47Underground cavities — Ind 48Underground cavities — Ind 49Underground cavities — Ind 50Underground cavities — Ind 51Underground cavities — Ind 52Underground cavities — Passage ThibézardUnderground cavities — Intersection rue de Signier et rue Paul DoumerUnderground cavities — Plateau Saint-vincent, caserne de gendarmerieUnderground cavities — 42 rue ChatelaineUnderground cavities — Rue ThibezardUnderground cavities — Rue Edgar Quinet
  • Classified installations34
  • Underground cavities58

Outline of the commune, north at the top.

Location of known classified installations, Seveso sites and underground cavities.

Source: Géorisques, Ministry of Ecological Transition · recorded on October 4, 2026

A prevention plan is not a bad sign in itself. It shows that the risk is mapped and regulated; it is its absence for a known hazard that should raise questions.

This page describes the commune, not an address. Before a sale or a letting, the seller or landlord must provide a risk statement drawn up for the property. You can obtain one free of charge for any address at georisques.gouv.fr.

Source: Géorisques, Ministry of Ecological Transition · recorded on October 4, 2026

Frequently asked questions — Laon

What is the price per m² in Laon?
The median recorded price is €1,181/m² — that is €1,132/m² for a flat and €1,267/m² for a house (source DVF/INSEE, data as of October 4, 2026).
How many inhabitants does Laon have?
Laon has 24,220 inhabitants, with a change of -2.6% (INSEE census).
What share of energy-inefficient homes are there in Laon?
31.8% of surveyed homes are rated E, F or G on the energy certificate (source ADEME).
What is the property tax rate in Laon?
The overall property tax rate on built properties is 65.6%, of which 59.2% is voted by the commune (source DGFiP).

The same data, put to work.

What the observatory publishes, the five MORYA tools put to use.