Premium consulting firm fit-out: offices worthy of your signature
Regulatory framework: professional secrecy, AML-CFT and DnT,A 42 to 48 dB
A firm aiming for DnT,A 42 dB on all its partitions over-invests by 40 to 50% in its acoustic budget. The performance level described as « confidentiality » is justified only for signing rooms and committee rooms, not for open-plan areas or circulation spaces. Kytom has been fitting out consulting firms, law practices, private banking structures and family offices since 2006, with 11 agencies across France and Spain. Premium services projects combine targeted acoustic confidentiality, client/staff zoning, hospitality lounges and sealed committee rooms. The average design and build timeline is 12 weeks, on floor plates of 400 to 2,500 m² located in the CBDs of Paris, Lyon, Madrid and Barcelona.
Premium services players operate under three cumulative frameworks that shape the fit-out. Professional secrecy, codified by the internal regulations of the bar associations, requires measurable acoustic sealing between signing rooms and circulation spaces. The AML-CFT obligations applicable to financial players require strict zoning of physical and digital files. The GDPR governs video surveillance, access control and data retention.
The technical objectives adopted by Kytom are built around the following benchmarks:
- standardised acoustic insulation DnT,A between 42 and 48 dB in the « confidentiality » class between signing rooms and circulation spaces;
- regulatory ventilation with 25 m³/h per occupant in enclosed offices;
- lighting maintained at 500 lux on the work surface, reduced to 300 lux in reception lounges;
- compliance with type W public-access buildings (administrations, banks, offices) according to the regulations applicable to the building’s classification, validated by an approved inspection office.
A business law firm receives several sensitive visitors per partner daily, which places discretion at the heart of operational requirements and justifies an acoustic investment of between 8 and 12% of the works budget.
Our reading differs from common practice on this specific point. The professional orthodoxy applies a uniform acoustic objective across the entire floor plate, for the convenience of specification. In practice, on the premium services projects we deliver, only a fraction of the partitions carry a contractual confidentiality stake: signing rooms, committees, partners’ offices receiving visitors. On floor plates of less than 250 m² occupied by fewer than 6 staff with no reception of sensitive third parties, aiming for DnT,A 42 dB on all partitions amounts to doubling the partitioning budget for marginal use. Kytom recommends targeting the reinforced acoustic objective on 1 to 2 signing rooms and applying a standard office grade of DnT,A 35 to 38 dB on the rest.
Kytom design and build method: 5 steps deployed over 12 weeks
The 5-phase Kytom method integrates design, fixed-price costing, works and furniture under a single contractual responsibility, over a standard timeline of 12 weeks.
- Programming: interviews with managing partners, counting of meeting types (signing, committee, lunch, videoconference).
- Design: 2 fixed-price scenarios, 2D plans, photorealistic 3D views, physical materials library delivered within 3 weeks.
- Engineering: acoustic, HVAC, high- and low-voltage, security studies, compliance validated by an approved inspection office.
- Execution: dedicated site manager, weekly meetings, photo reporting, locked budget.
- Delivery: pre-acceptance inspection, snag clearance within 15 days, digital as-built file, 12-month defects liability warranty.
The Qualibat qualification, granted for a period of 4 years when the application complies with the standard, frames every deliverable. For firms aiming for an international environmental standard, an HQE certification or the BBCA (Low Carbon Building) label applicable to new builds and renovations, or WELL, a certification lead is mobilised from the programming phase.
For the business decision-maker (managing partner or COO): what the fixed price really secures. Fixed-price costing commits the company to the budget and timeline, which transfers the risk of site change orders to Kytom rather than to the firm. For a law firm billing partner hours at between 400 and 800 EUR, each week of site slippage represents 80 to 160 partner hours lost in coordination management. The design and build fixed price is not a product, it is a transfer of risk.
When design and build is not the right answer. On projects of less than 200 m² or on purely furniture-based operations with no intervention on partitions, services or suspended ceilings, the design and build fixed price loses its economic value: the programming and engineering share then represents more than 25% of the total budget, compared with 8 to 12% on a complete project. In these cases, a separate furniture package or an interior architect fee-based assignment remains more efficient.
Benefits observed in post-occupancy: staff satisfaction and energy performance
Post-occupancy reviews conducted at 6 and 12 months on the premium services projects delivered by Kytom converge on four indicators. Staff satisfaction improves significantly, according to feedback gathered after delivery. The occupancy rate of signing and committee rooms also improves markedly, thanks to sizing driven by the actual uses recorded during programming.
DALI-regulated LED lighting, the BMS and reinforced joinery contribute to significantly reducing energy consumption, in line with the regulatory trajectories applicable to the office building stock. Densification reaches an average of 12% with no declared loss of comfort, which frees up budget for hospitality spaces.
On the commercial and HR side, the partners we support regularly observe that the renovated firm facilitates the conversion of institutional prospects and the recruitment of experienced lawyers or consultants. The investment in a premium fit-out is generally amortised over the duration of the lease, thanks to energy savings, space densification and reduced turnover.
Conditions for not achieving these gains. These performance levels assume programming conducted with the managing partners upstream, a residual lease of at least 6 years to amortise the acoustic and HVAC budget items, and an occupancy rate above 60%. On firms observed with an occupancy rate below 45% post-Covid, energy savings were limited to 8 to 12% and the ROI stretched beyond 60 months.
Method
- Image and functional audit
Diagnosis of your positioning, target client journey and confidentiality requirements (2 weeks). - Costed preliminary design
Plans, material boards, firm budget committed by Kytom (3 weeks). - Execution studies
Technical plans, authorisation filing, furniture validation (3 weeks). - Turnkey works
Management of all trades by a single project manager (6 to 12 weeks). - Acceptance and premium finishes
Snag clearance, acoustic measurement, furniture and artwork staging (2 weeks).
Frequently asked questions
What budget should be planned to fit out a premium consulting or law firm?
On the premium services projects delivered by Kytom, the works and furniture budget comes out at between 1,800 and 3,200 EUR excl. VAT/m² depending on the level of finish, the share of targeted acoustics (8 to 12% of the budget) and the density of committee rooms. A 600 m² floor plate with 2 DnT,A 42 dB signing rooms, 1 committee room, reception lounge and 18 enclosed offices falls in the mid-range. Costing is fixed-price from phase 2 of the design and build method.
How does Kytom guarantee the acoustic confidentiality of signing rooms?
The DnT,A objective adopted is between 42 and 48 dB and is validated by in-situ measurements at delivery, carried out by an independent acoustician appointed by the approved inspection office (Apave, Bureau Veritas, Socotec or Qualiconsult depending on the project). The standard partition combines double acoustic plasterboard, 70 mm high-density mineral wool, treatment of the upper and lower junctions, and an acoustic door with an automatic threshold seal. The incremental cost compared with a standard partition is 180 to 240 EUR excl. VAT/m² of partition.
Does the three-month timeline include administrative authorisations?
The project schedule covers programming, design, engineering, execution and delivery, excluding the processing of planning authorisations. For an interior fit-out with no modification to the facade or load-bearing structure, no authorisation is required in the majority of cases. For a change of use, a prior declaration or a building permit, allow for 2 to 4 additional months of processing. Kytom mobilises an HMONP architect registered with the Order for the filing.
How does coordination work with a firm in continuous operation?
For firms delivered in an occupied site, Kytom applies a phasing in 3 or 4 sequences of 3 to 4 weeks, with noisy works concentrated on 6pm-11pm slots or Saturdays for the majority of sensitive operations. A mobile buffer zone of 80 to 120 m² is returned each Friday in an acceptance-ready state of cleanliness. The dedicated site manager holds a weekly meeting with the managing partner or COO and publishes a photo report. Kytom hotline reachable 8am-6pm, intervention within 4 hours in the event of a site incident.
