Store fit-out: 10 mistakes to avoid

By Kollirama 24 July 2026 Updated on 6 August 2026

In short

The most costly fit-out mistakes are: neglecting the layout plan, undersizing the aisles, ignoring the natural direction of customer flow, overcrowding the displays and forgetting the checkout area. Each is corrected upstream through a layout study, at a cost far lower than reworking after opening.

1. Skipping the layout plan

Ordering furniture without a dimensioned layout plan is at once the most common and most costly mistake. In the field, it translates into gondolas that are impossible to install (posts, ducts, forgotten fire doors) and poorly sized displays. An on-site survey and a layout plan represent a few percent of the budget and eliminate most of these surprises.

2. Undersizing the aisles

A store’s main aisle must allow two customer trolleys to pass each other: in practice a minimum of 1.80 m, and 1.40 m for secondary aisles. Below this, customers avoid the aisles concerned. Regulatory reminder: circulation routes accessible to people with reduced mobility require a width of 1.40 m (occasional tolerance to 1.20 m) under the accessibility rules for public-access buildings (ERP).

3. Ignoring the natural direction of flow

The majority of customers spontaneously turn to the right on entering and move through the store anticlockwise, a behaviour long documented in shopping behaviour studies. Placing high-margin categories along this natural path, and loss-leader products at the back, shapes the performance of the point of sale.

4. Overcrowding the displays

Wanting to show everything leads to illegible aisles. Merchandising best practices reserve the zone between 0.80 m and 1.60 m in height (the "eye and hand level") for priority products, and maintain visual breaks (end caps, signage) every 6 to 8 linear metres to give rhythm to the customer journey.

5. Neglecting the entrance area

The first 3 to 5 metres after the entrance form a “transition zone” that the customer crosses without really looking: placing strategic products or key promotions there is counterproductive. This zone should be used to decompress, to guide (signage) and to reveal the depth of the store.

6. Forgetting the checkout area and queues

The checkout area concentrates impulse purchases and irritants (waiting). Sizing it too tightly creates queues that block the adjacent aisles. Providing space for queues, merchandising fixtures for the wait and a counter suited to the volumes (parcels, order collection) is part of the initial layout plan, not of adjustments after opening.

7. Choosing the furniture before defining the offer

The furniture is derived from the range plan, not the other way around: shelf depth according to packaging, permissible load according to the products (a paint aisle requires reinforced shelves often supporting more than 100 kg), specific accessories (prongs, bins, hanging rails). Buying generic furniture and then “fitting” the offer into it generates lost capacity and inconsistent aisles.

8. Sacrificing the stockroom and logistics flows

Reducing the stockroom to the strict minimum in order to maximise the sales floor is paid for in impossible replenishments and pallets stored in the aisles. Depending on the sector, the stockroom commonly represents 10 to 25% of the total area, with a delivery access dimensioned for the real flows (pallet trucks, roll cages).

9. Treating lighting and signage last

A poorly lit display is a dead display: the recommended level on the sales floor is generally between 300 and 750 lux depending on the zones, with accents on featured products. Orientation signage (categories, aisles) must be legible from the main aisle: it is designed on the plan, at the same time as the layout.

10. Postponing compliance

ERP accessibility (circulation widths, adapted checkout), furniture stability, permissible loads displayed on medium-duty shelving accessible to the public, clearances and emergency exits: incorporating these requirements from the design stage costs little. Discovering them when the safety commission visits or after an accident is expensive, both in works and in delayed opening.

The common thread: anticipate rather than correct

These 10 mistakes have one thing in common: they can all be corrected in the design phase, for a fraction of the cost of reworking after opening. A professional fit-out specialist who carries out surveys, layout plans and 3D visuals before ordering secures the budget, the schedule and the commercial performance of the store all at once.

Frequently asked questions

What aisle width should be provided in a store?

A minimum of 1.80 m for main aisles (two trolleys passing) and 1.40 m for secondary aisles. The ERP accessibility rules require 1.40 m for accessible circulation routes, with an occasional tolerance to 1.20 m.

Which shelf height should be favoured for high-margin products?

The zone between 0.80 m and 1.60 m (at eye and hand level) concentrates most of the pick-ups. The low and high levels are used for bulk stock and for loss-leader products already identified by the customer.

What share of the area should be devoted to the stockroom?

Depending on the sector and the delivery frequency, the stockroom commonly represents 10 to 25% of the total area. A store delivered daily can reduce this share; a merchant with heavy stock must increase it.

Should I use a fit-out specialist or buy the furniture directly?

Direct purchase is fine for replacing furniture on a like-for-like basis. As soon as there is a new layout or a redesign, the study by a fit-out specialist (surveys, plans, 3D) avoids sizing mistakes whose cost far exceeds that of the study.

Can a store be refitted without closing?

Yes, it is a common practice: the project is phased by zones, with aisles switched over at night or during off-peak hours. The schedule is longer than in a closed store, but the loss of turnover is avoided.

What obligations apply to shelving accessible to the public?

The furniture must be stable (anchoring or ballasting of tall elements), the permissible loads must be respected and displayed for medium-duty shelving, and the circulation routes must comply with the ERP rules on accessibility and evacuation. The safety commission may check these points.

Sources & references

Order of 20 April 2017 and ERP accessibility regulations (circulation widths)
AFE (French Lighting Association), recommendations for retail
Kollirama project feedback: fit-outs of DIY, food and pharmacy stores (2020–2026)