Brighton and Hove Structural Engineers
When a property project needs structural input, the structural engineer designs and certifies the structure and the builder carries out the work. This guide explains when an engineer is required, what they do, and how to choose one for an older Brighton and Hove building.
Many residential projects in Brighton and Hove involve some form of structural alteration — removing a wall, forming an opening, converting a loft or garage, or building an extension.
Where the structure of a building is affected, a structural engineer is usually required to design and certify the work. The builder then constructs it in accordance with that design.
Understanding the boundary between these roles helps owners commission the right professionals at the right time, and helps the project run without avoidable delays.
What a Structural Engineer Does
A structural engineer assesses how loads are carried through a building and designs the structural elements that keep it stable.
On a residential project, their work commonly results in calculations, drawings and specifications that describe the structural solution.
This can include:
- Beam and column calculations
- Load-bearing wall removal designs
- New opening designs
- Foundation designs
- Extension structural design
- Loft conversion structural design
- Garage conversion structural design
- Chimney breast removal calculations
- Underpinning design
- Retaining wall design
- Structural inspections
- Defect assessment
The output is typically a set of calculations and details that are submitted for Building Regulations approval and used by the builder to construct the work.
When You Need a Structural Engineer
Not every alteration requires a structural engineer, but any work affecting load-bearing elements usually does.
Typical situations include:
- Removing an internal wall
- Forming a new doorway or window opening in a load-bearing wall
- Removing a chimney breast
- Building a single or two-storey extension
- Converting a loft
- Converting a garage where structural elements change
- Underpinning foundations
- Repairing structural defects
- Altering a roof structure
- Building retaining walls
Where a project is purely non-structural — decoration, plastering, fitting a kitchen — an engineer is not normally required.
The Engineer and the Builder
The structural engineer and the builder have distinct but connected roles.
The engineer designs the structural solution. The builder constructs it. The two must agree on the practical details — how a beam is installed, how a wall is propped, how an opening is formed — before and during the work.
Good coordination avoids problems such as:
- Beams specified that cannot be installed in the available space
- Openings formed without temporary support
- Discrepancies between the structural design and the built work
- Delays to Building Regulations inspections
- Costly revisions during construction
Safe-Bricks works alongside structural engineers on projects and can coordinate the structural design with the building work.
Structural Engineers and Older Brighton Buildings
Brighton and Hove contain a wide range of traditional construction, including bungaroosh, solid brick, flint and mixed-masonry walls.
These buildings behave differently from modern cavity-wall construction, and not every structural engineer is experienced with them.
Where the building is older or traditionally constructed, it is worth asking an engineer about:
- Their experience with traditional solid-wall construction
- Their approach to bungaroosh and mixed masonry
- How they assess existing foundations
- Their approach to listed-building and conservation-area work
- Whether they design sympathetic repairs rather than only modern replacements
An engineer who understands the construction will usually produce a more appropriate and less disruptive solution.
Heritage Masonry Crack Diagnosis
Safe-Bricks is a heritage restoration specialist, and cracking is one of the most common reasons owners ask us to look at a wall. Our methodology is straightforward: we diagnose before we prescribe. Owners often approach crack repair specialists expecting a fixed remedy quoted from a photograph, but a crack is a symptom rather than a defect in itself, and the appropriate repair cannot be specified until the mechanism behind it is understood.
Cosmetic cracking in stucco and lime render
Fine cracking within historic stucco or lime render is frequently superficial. Lime-based coatings are comparatively soft and were designed to accommodate seasonal movement by distributing it through the coating rather than resisting it. Shrinkage cracks, crazing, hairline separation at joints between old and later repairs, and localised loss around failed ironwork or blocked rainwater goods are all confined to the finish. Such cracking is generally narrow, irregular in direction, stable over time, and unaccompanied by any distortion of openings or wall plane. Where the render remains well bonded to the substrate, the correct response is usually localised patching and repointing in a compatible lime mortar, not wholesale removal.
Structural failure within bungaroosh core walls
Deeper cracking has a different character. Bungaroosh is a composite of flint, brick fragments, beach cobble and chalk bound in lime, and its strength depends on the integrity of that binder. Where water has been entering the wall over a long period, or where an impermeable coating has prevented it from leaving, the binder is progressively washed out and the core loses cohesion. Cracking of this kind tends to be wider at one end, to run diagonally or to follow a stepped path through the masonry, and to be accompanied by bulging, hollow-sounding areas, displaced openings or movement that continues between inspections. Diagnosis in these cases involves opening up carefully at selected points, probing the core, tracing the moisture path and considering the condition of foundations, drainage and adjoining structures. Where the evidence points to structural movement rather than surface failure, a structural engineer should be engaged to assess and design the remedial work.
Why material compatibility governs the repair
The material used to make the repair matters as much as the repair itself. Rigid cementitious mortars and renders are stronger and less permeable than the fabric they are applied to. They cannot accommodate the small movements a traditional wall makes, so cracking reappears at the margins of the patch, and they seal the evaporative route the wall relies upon, holding moisture within the core where it continues to dissolve the lime and chalk binder. Freezing of that retained moisture then lifts the coating away from the substrate. Breathable, vapour-open lime repairs behave differently: they allow moisture to move out through the mortar, they accept movement by cracking finely and self-healing rather than failing at the interface, and they can be adjusted or removed later without damaging the historic material beneath. On that basis we specify lime-based systems for repairs to traditional masonry and advise against cementitious intervention.
Where a diagnosis identifies loss of the core or failure of a previous cement coating, the work falls within our specialist bungaroosh repair service, carried out in materials compatible with the original construction.
Structural Input for Extensions
Home extensions almost always require structural design.
The foundations, any steelwork, the connection to the existing building, and the roof structure are all structural elements that an engineer will address.
For an extension, the engineer may provide:
- Foundation calculations
- Beam and column designs
- Roof structure design
- Connection details to the existing building
- Calculations for Building Regulations submission
Where the extension meets an older building, the junction between new and traditional construction needs particular attention from both the engineer and the builder.
Structural Input for Garage Conversions
Garage conversions frequently require structural design, particularly where the work involves altering the garage-door opening or forming new openings.
The engineer designs the new structural elements; the builder constructs them.
Typical structural considerations include:
- Forming a new opening in the existing garage front
- Supporting the structure above a removed garage door
- New lintels and beams
- Altering internal walls
- Connection to the main house
The structural design is usually required as part of Building Regulations approval.
Chimney Breast Removal
Removing a chimney breast — in part or in full — is a common alteration that requires structural design.
The remaining stack and any flue must be properly supported, and the work usually requires both structural calculations and Building Regulations approval.
The engineer typically addresses:
- Support of the remaining chimney stack
- Support of any flue above
- New beam or support design
- Making good the surrounding structure
This is the kind of alteration where coordination between engineer and builder is particularly important.
Listed Buildings and Conservation Areas
Where a property is listed or in a conservation area, structural work may need listed building consent as well as planning permission and Building Regulations approval.
An engineer experienced with heritage buildings will usually design a more sympathetic solution and is more likely to produce proposals that satisfy conservation officers.
Considerations include:
- Retaining original structural fabric where possible
- Using compatible repair methods
- Avoiding unnecessary modern intervention
- Documenting the existing construction
- Coordinating with the conservation officer
Specifying modern, unsympathetic structural solutions on a listed building can cause delays, refusal, or damage to historic fabric.
How to Choose a Structural Engineer
Not all structural engineers are the same. Their experience, specialisms and approach vary.
When choosing an engineer for a Brighton and Hove project, consider:
- Relevant experience with the type of project
- Experience with traditional and heritage construction
- Membership of a professional body such as IStructE or ICE
- Professional indemnity insurance
- Clarity of fee proposal
- Willingness to coordinate with the builder
- Familiarity with local authority requirements
- Ability to provide calculations promptly for Building Regulations
The cheapest fee is not always the best value; a well-prepared, buildable design can save significant cost during construction.
Structural Engineer vs Building Surveyor
These two professions are sometimes confused.
A structural engineer focuses on the strength and stability of a building's structure. A building surveyor assesses a property's condition more broadly — defects, maintenance, value — and may produce a survey report for a purchase.
On a project you may need both:
- A surveyor to assess condition before purchase or work
- A structural engineer to design structural alterations
- A builder to carry out the work
They are complementary, not interchangeable.
Cost of a Structural Engineer
Structural engineering fees depend on the scope of the project and the engineer's involvement.
A single beam calculation may be relatively inexpensive; a full structural design for an extension or conversion will cost more.
Fees are usually quoted based on:
- The complexity of the structural work
- The number of calculations required
- Site visits and inspections
- Production of drawings and details
- Coordination with the builder and building control
The fee and scope should be agreed in writing before the engineer begins work.
How Safe-Bricks Works With Structural Engineers
Safe-Bricks is a building contractor, not a firm of structural engineers.
On projects that require structural design, we work alongside a structural engineer — either one you appoint directly or one we recommend — and coordinate the structural design with the building work.
This coordination includes:
- Agreeing the practical buildability of the design
- Sequencing the structural work within the programme
- Arranging temporary support
- Coordinating Building Regulations inspections
- Installing structural elements in accordance with the design
- Reporting any discrepancies between the design and the existing construction
The result is a project where the structural design and the construction are properly integrated rather than produced in isolation.
Planning a Project That Needs Structural Input?
If you are planning an alteration that may need a structural engineer — an extension, a garage conversion, a wall removal or a chimney breast removal — send Safe-Bricks photographs for an initial review.
We can help you understand whether structural design is likely to be required and how the structural and building work can be coordinated.
Useful information includes:
- Photographs of the area concerned
- The age and type of property where known
- What you want to alter or build
- Any existing defects or cracking
- Whether the property is listed or in a conservation area
From there we can advise on the appropriate next steps, including whether a structural engineer should be engaged.
Structural engineer frequently asked questions
Not sure where to start?
Send us photographs of the area of concern. It is the most straightforward first step — we will look at what you can see and advise on the appropriate next steps.