Site report

NAK FITNESS

5 PLACE COLBERT 78180 MONTIGNY-LE-BRETONNEUX · Île-de-France
82.8
/ 100
Go
Location only — excludes rent, fit-out, lease terms and the price of the business. 80% of the scoring weight was measurable here.

The site

Opened
2026-09-30
Activity
Traditional Gym / Fitness Club
Status
active · operating gym floor
Coordinates
48.78405, 2.04428

Within 3 km — gym floors filled, other sports hollow

500 m1 km2 km3 kmON AIR FITNESSON AIR FITNESSBASIC FITBASIC FITFitness Park Montigny-leFitness Park Montigny-leBODY FIT FRANCE.BODY FIT FRANCE.ST CYR SPORTST CYR SPORTPOWER-UP CROSSTRAININGPOWER-UP CROSSTRAININGCOBE LGCCOBE LGCAERO CLUB DES I P S AAERO CLUB DES I P S A© OpenStreetMap contributors
13 gym floors, 11 other sports sites. The eight nearest gyms are labelled. Rings at 500 m, 1 km, 2 km and 3 km; north is up.

Strengths & weaknesses — by weighted effect

▲ Capture 100 — 2,758 residents + 3,708 workers, demand within 500 m against every competitor within 3 km
▲ Saturation 93 — 5 clubs / 39,657 residents = 12.61 per 100k against 11.01 nationally
▲ Catchment 79 — 4,796 aged 18-64 + 10,183 workers = 14,979 over 0.79 km2 = 19,072/km2
▼ Competition 44 — 3 genuine gym floors and 0 other sports sites within 500 m, weighted by substitutability and price tier

How the score was reached — seven parameters, five measured separately at 500 m and 2 km

ParameterWhere MeasuredScore How it was arrived at
Catchment 79
weight 20%
 500 m 14,979 people 90 4,796 aged 18-64 + 10,183 workers = 14,979 over 0.79 km2 = 19,072/km2
2 km 70,705 people 71 24,643 aged 18-64 + 46,062 workers = 70,705 over 12.57 km2 = 5,627/km2
Competition 44
weight 15%
 500 m 2.10 wt 31 3 genuine gym floors and 0 other sports sites within 500 m, weighted by substitutability and price tier
2 km 4.51 wt 53 5 genuine gym floors and 3 other sports sites within 2 km, weighted by substitutability and price tier
Capture 100
weight 20%
 500 m 6,466 people 100 2,758 residents + 3,708 workers, demand within 500 m against every competitor within 3 km
2 km 17,218 people 100 6,410 residents + 10,808 workers, demand within 2 km against every competitor within 3 km
Saturation 93
weight 15%
 500 m not measured — catchment of 7,416 residents is below the 10,000 needed for a density measure to mean anything — one club would move it by 1.2 LQ
2 km LQ 1.15 93 5 clubs / 39,657 residents = 12.61 per 100k against 11.01 nationally
Fit —
weight 10%
 unit not measured — no floor area recorded for this unit
Rental —
weight 10%
 unit not measured — no rent or no floor area recorded
Income 100
weight 10%
 500 m 1.25× 100 27,875 EUR against 22,380 nationally, median of 2 IRIS within 500 m
2 km 1.32× 100 29,580 EUR against 22,380 nationally, median of 19 IRIS within 2 km
Each parameter scores 0–100 on a stated line between named breakpoints, then the seven combine on their weights — renormalised over whatever was measurable, so a missing parameter dilutes nothing rather than counting as zero.

Competitive field — every active gym and other sports site within 3 km

BandGym floors Other sportsMCI weight
within 500 m3 0 2.10
500 m – 1 km0 0 —
1 – 2 km2 3 2.41
2 – 3 km8 8 8.20
Within 3 km13 11 12.7 total
Each site is discounted by how substitutable its activity is for a gym and how far its price tier sits from a mid-market club — so 13 gym floors and 11 other sports sites weigh 12.7, not 24.

Gym floors, within 500 m — 3

0.06 ON AIR FITNESS On Air
0.31 BASIC FIT Basic-Fit
0.44 Fitness Park Montigny-le-Bretonneux Fitness Park

Gym floors, 1 – 2 km — 2

1.86 BODY FIT FRANCE.
1.91 ST CYR SPORT

Gym floors, 2 – 3 km — 8

2.35 POWER-UP CROSSTRAINING
2.38 COBE LGC
2.41 AERO CLUB DES I P S A
2.44 BASIC FIT Basic-Fit
2.47 LADY MOVING
2.7 SQY EQUITATION
2.82 FITNESS PARK Fitness Park
2.87 CROSSFIT (LICENSED BOX) CrossFit (licensed box)

Other sports sites — 11 within 3 km, discounted by activity

1.36 CROSSFIT H78 CrossFit / Functional Training
1.45 SALLE DE YOGA Yoga
1.88 PISCINE MUNICIPALE A. VIENOT Swimming / Aquatic
2.21 CENTRE AQUATIQUE DU LAC Swimming / Aquatic
2.48 LYCEE MILITAIRE DE SAINT CYR Other / Unclassified
2.58 MAISON D'ARRET Other / Unclassified
2.63 ASS TENNIS CLUB VOISINS LE BRETONNEUX Tennis
2.73 GYMNASE ET STADE DE L'AVIATION Multi-sport Complex
2.75 GYMNASE JEAN MACE Multi-sport Complex
2.78 MY BIG BANG ST QUENTIN EN YVELINES Other / Unclassified
2.82 ASS TENNIS CLUB VOISINS LE BRETONNEUX Tennis

Competition since opening — gyms within 1 km, by the year they opened

5 when it opened, 2026-09-30 → 5 today, 0 arrived since
5 rival(s) within 1 km when this club opened, 5 now. The forecast uses the founding count: it measured better than averaging the field over the club's life (LOOCV 0.091 vs 0.106). 1 nearby site(s) have no usable opening date and are not in either count.

Access — straight-line distance, GTFS

Nearest rail
Saint-Quentin en Yvelines — 289 m
Nearest bus
Fulgence Bienvenüe — 213 m
Counted footfall
Saint-Quentin en Yvelines - Montigny-le-Bretonneux — 289 m, 12,011,294 travellers a year (SNCF)
Straight-line, not travel time: no free routing service covers France at this volume, so a stop 300 m away across a railway line reads the same as one 300 m along the street.

Catchment — INSEE 200 m population grid, Filosofi 2021

RingResidents Per km²Median age Adults 18–64Share of residents
0.5 km 7,416 9,442 34.9 4,796 65%
1.0 km 18,171 5,784 35.3 11,546 64%
2.0 km 39,657 3,156 37.2 24,643 62%
3.0 km 99,940 3,535 37 62,349 62%
Adults 18–64 is the span members come from. A median age alone does not separate a student quarter from a family suburb, and those are not the same market.

Age profile — residents within 2 km

0–32,0295%
4–51,1013%
6–102,7507%
11–173,7629%
18–243,3849%
25–398,32121%
40–548,21421%
55–644,72312%
65–794,50511%
80+8352%
Working-age brackets in blue. 39,626 residents within 2 km.

Household income — INSEE Filosofi 2021

Median
€26,170 a year, per consumption unit
Poorest tenth
below €14,060
Richest tenth
above €45,890
Spread
×3.3 between them · Gini 0.262
Poverty rate
10.0% of households below 60% of the national median
Published at iris level (IRIS 784230103). An IRIS is a neighbourhood of roughly 2,000 people; a commune can be a whole town. The level travels with the figure, so a town's median is never read as this street's.

The establishment — INSEE Sirene

Legal name
NAK FITNESS
SIREN
131113326 the company
SIRET
13111332600014 this establishment
Company founded
2026-09-30
This site opened
2026-09-30
Activity code
93.13Z
Head office
yes — this is the registered siège
Employees
Unknown / non-employer
Sources
sirene

Officers — company representatives on file

Legal representatives, not shareholders. France closed public access to the beneficial-ownership registry in July 2024, so who owns the company is not obtainable from open data.

Filed accounts — INPI, the keyed annual accounts

Revenue
not filed
Net result
not filed
No keyed accounts in INPI's feed for this company. Absence means unfiled, not zero — most small French companies file late or not at all.
What this is. The Location Score is model output, computed from open data; it is not a measured fact and not a valuation. Registry facts — name, SIRET, NAF, address, opening date, officers, filed revenue — come from INSEE Sirene and the Ministère des Sports facility census. Population, age profile and income are INSEE (Filosofi 2021, 200 m grid and IRIS). Competitors are the active, genuinely-operating gym floors in this database. Distances are straight-line, not travel time.
Location Score model 3.1.0, computed 2026-10-17.
Generated 18 October 2026, 05:28 UTC · siret:13111332600014
Sources : INSEE, Sirene (www.insee.fr), données mises à jour le 2026-10-18 · INPI, Registre national des entreprises (stock du 2026-03-04, API au 2026-10-18) · Ministère des Sports, Data ES (2026-10-17) · INSEE, Filosofi 2021 (carreaux 200 m, IRIS) et BPE 2025 · IGN, Contours IRIS 2026 · OpenStreetMap contributors (ODbL). Licence Ouverte / Etalab 2.0 sauf mention contraire.