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Refurbishment and Alterations

Structural engineering for refurbishment, alterations and adaptation projects — from domestic extensions to complex existing buildings. 

Every existing building has a story

Our job is to make sure the structural engineering helps write the next chapter - not erase what came before.

We work with architects, surveyors and homeowners on refurbishment and alteration projects of all scales. Whether it’s opening up a Victorian terrace, reconfiguring a commercial floor plate or tackling something more structurally complex, we bring the same approach: take the time to understand the building, understand what the project needs to achieve, and find the most practical, well-considered structural solution.

We believe the most sustainable structure is the one that’s already standing. Adapting and improving existing buildings — rather than demolishing and starting again — is better for the environment, better for communities, and often more interesting engineering.

It’s why this work is at the heart of what Weave does.

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How we help 

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Structural design for residential and commercial refurbishments

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Internal alterations — removing walls, creating openings, reconfiguring layouts 

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Feasibility studies for proposed alterations

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Planning support including Basement Impact Assessments/Structural Methodology Statements for basement developments  across all London boroughs

Supporting existing structures

Refurbishment projects require a different kind of thinking to new build. Existing buildings don’t always behave the way you expect — and understanding what’s already there, before committing to a structural solution, makes a significant difference to programme, cost and buildability.



We work closely with architects, surveyors and clients from the earliest stages, contributing structural thinking that supports good design decisions rather than complicating them. We communicate clearly — in plain language, at the right level of detail for the audience — and we’re always looking for solutions that are efficient, buildable and proportionate to the project.

Why Weave

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Experience

20+ years working on existing buildings

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Approach

Collaborative approach - we work with design teams, not around them. 

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Transparency

Clear, practical advice at every stage - no unnecessary complexity.

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Sustainability

An informed view on embodied carbon and sustainability when comparing structural options

Interested? Let's get in touch!

What looked like a small patch of purple grass, above five feet square, was moving across the sand in their direction.

WHAT THEY SAY

Word Around

“In the eighteenth century the German philosopher Immanuel Kant developed a theory of knowledge in which knowledge about space can be both a priori and synthetic.”

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Jack McKinney
Investor

“As quantum mechanics developed further, it turned out that there were a large number of things which were not directly encompassed in the Schrödinger equation—such as the spin of the electron, and various relativistic phenomena. The mathematics that is involved is particularly simple, involving simple algebraic operations and no differential equations or at most only very simple ones. But they are, we assure you, by all odds the simplest parts—in a deep sense of the word—as well as the most basic parts. This is frankly a pedagogical experiment; it has never been done before, as far as we know.”

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John Doe
Marvin McKinney

“As quantum mechanics developed further, it turned out that there were a large number of things which were not directly encompassed in the Schrödinger equation—such as the spin of the electron, and various relativistic phenomena. The mathematics that is involved is particularly simple, involving simple algebraic operations and no differential equations or at most only very simple ones.”

karen
Sarah Joses
Investor

“But they are, we assure you, by all odds the simplest parts—in a deep sense of the word—as well as the most basic parts. This is frankly a pedagogical experiment; it has never been done before, as far as we know.The mathematics that is involved is particularly simple, involving simple algebraic operations and no differential equations or at most only very simple ones.”

charles
Jack McKinney
Investor