Insights

Field-grade notes from London renovation projects. What goes wrong, what works, and why.

Permitted Development or Planning Permission in Central London

In prime central London, permitted development is mostly a right you do not have. What removes it, how to check your address, and what it costs in 2026.

Grade II Listed: What You Can Change

What a Grade II listing covers, when you need listed building consent, and why the repair-or-change line is decided by a person, not a fixed rule you can check.

What fixed-price contracts hide

Fixed-price renovation contracts are fixed only against the scope as drawn. Four mechanisms move the rest. What each does, and what to ask before signing.

Artur Kvasnei

27 May 2026

minute read

COST

Cost Plan vs Quote: The Difference That Costs Renovations Money

A cost plan and a quote are different documents doing different jobs. The legal distinction in Consumer Rights Act 2015 s.50 explains why.

By Artur Kvasnei · 6 May 2026 · 12 minute read

PCSA

What a Pre-Construction Services Agreement Actually Does

A PCSA is the fixed-fee contract a contractor signs to price the work before the main contract. The mechanism behind two-stage tendering.

By Denis Kvasnei · 27 April 2026 · 9 minute read

PCSA

The Six Zones of a Myrmex PCSA

A PCSA isn't one document. It's six zones of priced work, each producing evidence the main contract depends on.

By Denis Kvasnei · 27 April 2026 · 7 minute read

PCSA

PCSA vs Letter of Intent: Which Instrument Belongs at Which Stage

Both authorise work before the main contract exists. They do different jobs. The right sequence on a project that needs both is PCSA first.

By Denis Kvasnei · 27 April 2026 · 6 minute read

FOUNDATION

Why Myrmex Exists

The London renovation industry sells craft and trust. It runs the project on neither. Myrmex was set up to replace that, with systems.

By Denis Kvasnei · 27 April 2026 · 3 minute read