Civil and Commercial Mediation and Strategic Dispute Consultancy
Cosil Solutions works with housing organisations, local authorities, legal teams and commercial clients managing disputes, risk exposure and governance pressure across housing, property and commercial matters.
Engagements are led by Insley Ettienne, an accredited civil and commercial mediator with over 20 years of frontline experience in housing and property. Where appropriate, engagements are supported by qualified associates working under her direct supervision.
What we do
Three services. One practice.
Mediation and Conflict Management
Accredited civil and commercial mediation for property, housing, leasehold, service charge and commercial disputes. Structured conflict management for situations where relationships or stakeholder dynamics have broken down.
Strategic Dispute Consultancy
Independent analysis and structured support for organisations managing dispute risk, governance pressure and operational exposure. We work alongside internal teams and legal advisers.
Deputising and Strategic Support
Experienced, independent support for complex or high-risk matters during periods of pressure, transition or capacity constraint. A clear mandate and active oversight from day one.
Why organisations work with us
Proven Methodology
The RESOLVE framework provides a structured approach to navigating complex disputes and organisational challenges. It brings consistency and clear decision-making to situations where stakes are high and outcomes matter.
Housing and Property Specialists
Deep, hands-on experience across housing associations, local authorities and property-focused organisations. This sector insight ensures disputes, risks and decisions are handled with a clear understanding of operational, regulatory and reputational realities.
Award-Winning Service
Recognised for delivering strategic mediation and consultancy that supports robust outcomes for organisations operating in complex and high-pressure contexts. Awards reflect approach and impact, not volume or scale.
Risk and Dispute Management
Support that helps organisations identify exposure early, understand options clearly and take proportionate action before issues escalate into formal disputes, litigation or organisational disruption.
Integrated Service Delivery
Mediation, consultancy and deputising delivered as standalone services or combined where matters are complex, sensitive or evolving. This flexibility allows support to adapt as situations change.
Timely Outcomes
A pragmatic focus on progress and resolution. Most matters move forward within weeks rather than months, reducing uncertainty, cost and organisational distraction.
Cosil Solutions vs. Litigation
| Aspects | Litigation / Court | Cosil |
|---|---|---|
Average Cost | £5,000 to £25,000+ | From £1,200 per party (mediation) or £220 per hour (consultancy) |
Time to Resolve | 12 to 24 months | 4 to 8 weeks |
Decision Control | Judge decides | You stay in control |
Privacy | Public record | Confidential and without prejudice |
Process Style | Adversarial and formal | Structured, calm, collaborative |
Relationship Impact | Often damages trust | Preserves communication and co-operation |
Focus | Ends at judgment | Builds understanding and prevention for future |
A recent example of how a structured, impartial approach helped resolve a complex property dispute efficiently and professionally.
Serving London and the UK
Cosil Solutions supports organisations across London and the UK, working primarily with housing associations, local authorities, property-focused organisations and legal teams.
Services are delivered in person or online, allowing support to be provided wherever it is most effective.
Who We Work With
Cosil Solutions works with housing associations, local authorities, property-focused organisations and legal teams, as well as individuals involved in complex or high-stakes property and housing matters. Our clients operate across the UK and engage us where disputes, risk or organisational pressure require experienced, impartial and commercially aware support.
I had the opportunity to work with Insley Ettienne on a complex probate matter involving a leasehold property with no identified next of kin. Insley took the lead on the entire process... She demonstrated clarity, initiative, and sound professional judgement throughout. It was clear that Insley was driving the resolution forward, balancing risk and time sensitivity with confidence and expertise. Her leadership and ability to navigate complex legal frameworks made a significant impact on the outcome of the case. A trusted and highly capable professional, I would welcome the opportunity to work with her again on any high-stakes or sensitive matter.
Martin Olomofe MBA MRICS
Not sure where to start?
The Dispute Readiness Check gives a structured view of your position, what risk you are carrying and what proportionate next steps look like. It takes a few minutes and is free.
See What Our Clients Have To Say
In the voice of our valued clients lie the testament to Cosil Solution’s commitment to transformative care.
I worked with Insley at Wandle Housing Association. I found Insley to be highly professional was a vast knowledge of leasehold tenures. I have found Insley to be solution-focused with a high-level of customer care; I found her to be very supportive as a colleague and would welcome the opportunity to work with her again.
I worked with Insley at Family Mosaic and found her to be very knowledgeable and passionate in all aspects of her role. Insley is a professional and delivered her services deligently and efficiently.
I am so grateful for Cosil Solutions support in handling my property dispute in a quick and professional manner. They were supportive, friendly, and remained unbiased throughout the whole process. I would not hesitate to use them in the future and highly recommend them.
Having worked with Insley at Family Mosaic as well as another large housing association, I am able to say that she is far one of the most knowledgeable individuals I have worked with in the field. She taught me a great deal about the sector, property management, and various issues surrounding property law. It has always always been a pleasure working with Insley. I would not hesitate in recommending her expertise to any housing organisation.