Old buildings can often be made warmer, healthier, and easier to live in, but they do not respond well to generic solutions. Retrofit Consultancy is a strategic service for owners seeking to improve comfort, reduce heat loss, and plan sensitive upgrades without compromising the building's character, balance, and material integrity.

Our role is to help clients understand what is possible, what is appropriate, and where the real opportunities and risks lie. That may involve windows and glazing, but it may equally involve draughtproofing, insulation, ventilation, heating, moisture, maintenance, and the practical realities of securing consent for change. Historic England’s current guidance places strong emphasis on a whole-building approach, recognising that fabric, services, ventilation, moisture movement, and occupation all interact. That broader view sits at the heart of this service.

Overview

Retrofit is rarely about adding one measure in isolation. In historic buildings, apparently simple improvements can have wider consequences for fabric health, condensation risk, ventilation, usability, and significance, which is why careful assessment matters.

This service is intended for owners who want a more considered route forward: one that improves day-to-day comfort and energy performance while respecting the qualities that make an old building worth caring for in the first place.

Scope

Retrofit Consultancy may include:

• Joinery and glazing feasibility.
• Review of windows, doors, roofs, floors, and other parts of the building envelope.
• Advice on draughtproofing, heat loss, ventilation, and condensation risk.
• Consideration of heating systems, controls, and related services.
• Assessment of renewable technologies where they are genuinely appropriate.
• Prioritisation of measures in relation to cost, significance, and practical benefit.
• Early planning and listed building consent advice where proposals need to be carefully tested

The intention is not to prescribe a standard package of upgrades, but to arrive at a measured response that suits the building, its condition, and the way it is used.

Approach

Initial Consultation: 'Joinery & glazing feasibility'
For some clients, the starting point is a specific question: whether existing windows can be improved, whether vacuum glazing may be viable, or whether joinery upgrades are likely to be acceptable in heritage terms. This initial consultation provides an informed view of the on-site issues, taking into account the building's specific constraints and the likely concerns of the local authority. It is intended to turn a technically complex subject into a clear basis for decision-making. Where glazing is a key part of the discussion, the consultation can sit alongside our more detailed guidance on vacuum glazing for listed buildings.

Sustainable Retrofit Assessment: 'Comfort, conservation, and care'
Where a broader review is needed, we undertake a more comprehensive assessment based on whole-building principles. This considers the interaction between fabric, services, ventilation, moisture, and occupancy, helping clients understand which measures are likely to be worthwhile, which require caution, and how different interventions may affect one another. The result is a structured report setting out opportunities, concerns, priorities, and the likely implications of change. It is designed to support better decisions, not simply to add technical complexity.

Planning Pre-Application Consultation: 'A sensible point of early testing'
Where proposals are likely to affect significance, early engagement with the local planning authority can be a valuable part of the process. We can prepare and coordinate pre-application advice to test key ideas before formal applications are submitted, helping clarify likely heritage concerns and reduce avoidable risk. This is often particularly useful for listed buildings, where modest-looking changes can have wider implications for significance, detail, and consent.

Principles

Our approach is fabric-first and whole-building. In broad terms, that means reducing demand before moving to more complex interventions: improving the building envelope where appropriate, addressing draughts and thermal weaknesses, and considering services or renewables in the light of the building as a whole rather than as isolated upgrades. It also means paying close attention to what older buildings require in order to remain healthy over time. Moisture movement, ventilation, material compatibility, workmanship, maintenance, and user understanding all matter, and each can affect the long-term success of even well-intentioned work.

Why it matters

A successful retrofit should make a building more comfortable and less wasteful, while remaining architecturally coherent and technically sound. The best outcomes tend to come not from doing the most, but from understanding what will make the greatest difference without creating new problems elsewhere. Retrofit Consultancy is therefore less about chasing a single measure and more about establishing a thoughtful route forward. For owners of listed and historic buildings, that clarity is often the most valuable part of the process.

A careful starting point

If you are considering how to improve the comfort and performance of a listed or historic building, Retrofit Consultancy offers a careful starting point — one grounded in an understanding of heritage, technical judgment, and the realities of planning-sensitive change.