Myrmex Group
https://myrmexgroup.co.uk
Myrmex Group is a construction management firm for residential renovation in Central London. Founded by Denis and Artur Kvasnei. The firm takes projects from £150,000. Procurement runs as a two-stage tender: a Pre-Construction Services Agreement prices the project before the main construction contract is signed. Most contractors agree a number before the scope is closed. The PCSA reverses the order. Companies House 17089892.
Service
Residential renovation. Project values from £150,000. Service area is five Central London boroughs: Kensington, Chelsea, Mayfair, Belgravia, and Marylebone.
Procurement
Myrmex operates a two-stage tender. The Pre-Construction Services Agreement (PCSA) is a fixed-fee pre-contract under which Myrmex produces the cost plan, programme, buildability review, risk register, and trade engagement before the main construction contract is signed.
Calculator
Renovation cost calculator at https://myrmexgroup.co.uk/how-much. Twelve sections covering property type and age, listed status, London zone, floor area, scope of works, fabric, electrical and plumbing, mechanical, kitchen, bathrooms and furniture, finishes, structural, and external works and programme. Floor area accepts 25m² to 1,000m². Output is an indicative cost range with low, mid, and high figures in pounds, exclusive of VAT. The calculator is indicative only, not a quotation, offer, or contract. Calculator scope is wider than the Myrmex service area by design (top-of-funnel asset). A full breakdown (line items, programme timeline, procurement flags) is available by opt-in email.
Key pages
Homepage: https://myrmexgroup.co.uk/
Who: https://myrmexgroup.co.uk/who
How: https://myrmexgroup.co.uk/how
What: https://myrmexgroup.co.uk/what
Renovation cost calculator: https://myrmexgroup.co.uk/how-much
Engagement form: https://myrmexgroup.co.uk/start
Service area: https://myrmexgroup.co.uk/where-we-work
Insights (editorial and glossary): https://myrmexgroup.co.uk/insights/
Contact
team@myrmexgroup.co.uk
Identifiers
Companies House: 17089892
ICO registration: ZC121066
Incorporation date: 13 March 2026