Frequently Asked Questions

You’ll usually need a Structural Engineer if your project involves altering or supporting the structure of your home. Common examples include removing load-bearing walls, creating large openings for extensions or bi-fold doors, loft conversions, chimney breast removal, structural repairs, or new foundations.

If you’re unsure, an initial review can confirm whether engineering input is required before works begin.

As early as possible, and always before construction starts.

Early involvement helps confirm feasibility, avoid redesigns, reduce delays, and provide clear information to builders and Building Control. Leaving it too late can lead to increased costs and programme disruption.

Yes. Many homeowners contact us after noticing cracks, uneven floors, sticking doors or windows, or signs of movement.

We can assess the issue, explain what’s happening in plain English, and advise on whether repairs or further investigation are required.

Yes. Structural Engineers regularly work directly with homeowners.

No technical background is expected. We’re used to explaining issues clearly and helping clients make informed decisions.

A Structural Engineer ensures your home is safe, stable, and structurally sound.

For domestic projects this typically includes site visits, structural assessments, designing beams, columns, floors and foundations, producing structural calculations, preparing construction details, and providing information required by Building Control.

The focus is on safety, performance, and compliance with regulations.

Each professional has a distinct role.

Architects focus on layout, appearance, and planning matters. Structural Engineers focus on strength, stability, and safety. Builders construct the works on site.

Structural Engineers work alongside architects and builders to ensure the design can be built safely and compliantly.

Structural design may influence sizes, spans, or construction methods, but the aim is to support your project rather than restrict it.

Where something isn’t feasible, we explain why and suggest practical alternatives that balance safety, buildability, and cost.

Yes. Structural Engineers regularly work with builders, architects, and other consultants.

We can coordinate with your architect, issue information directly to your builder, and respond to site queries during construction to help the project run smoothly.

Yes. Most structural works require approval from Building Control, even where planning permission is not needed.

Building Control will normally request structural calculations and drawings to demonstrate compliance with the Building Regulations. These are provided by a Structural Engineer.

Planning permission and structural engineering are separate requirements.

Planning relates to appearance, scale, and impact on neighbours. Structural engineering relates to whether the works can be carried out safely.

Some projects fall under Permitted Development but still require structural design and Building Control approval.

Steel beams and load-bearing alterations are controlled works under the Building Regulations. Building Control will usually require structural calculations to demonstrate that the beam is correctly designed and safely supports the loads above.

While builders may have practical experience, they cannot self-certify structural design unless they are suitably qualified and insured to do so.

Building Control assess compliance, not appearance.

Calculations demonstrate that the beam is appropriately sized, adequately restrained, has acceptable deflection, and complies with the Building Regulations. This protects the homeowner and the property.

Sometimes, but it is not guaranteed.

Retrospective approval may require opening up finished works, providing calculations after installation, or additional inspections and fees. Engaging a Structural Engineer early avoids these risks.

Fees depend on the size and complexity of the project. Most domestic work is offered on a fixed fee agreed in advance, although hourly rates are sometimes used for advisory work.

Across the UK, the typical hourly rate for a Chartered Engineer is generally:

• £80 – £200 per hour, depending on services being offered.

• Daily rates are often around £400 – £600 per day depending on experience and location.

For residential projects, engineers usually provide fixed fees for calculations, drawings, and reports rather than charging hourly. Some examples are shown below, these are indicative and subject to a projecs specific requirements.

• Structural advice / initial site visit    £250 – £500

• Structural condition survey with report       £900 – £3,000+

• Small extension (single beam / opening)     £650 – £1,250

• Medium extension (multiple beams / structural layout)    £1,000 – £2,500

• Loft conversion structural design    £750 – £2,200

Early engineering input often saves money by avoiding over-designed solutions, reducing on-site changes, and preventing unexpected structural issues.

Timescales depend on the complexity of the works and the information available.

Small domestic alterations are often completed within a few days. More complex projects may take one to two weeks. Urgent timescales can often be accommodated where required.

Yes. Most domestic projects require a site visit.

A site visit allows the engineer to understand the existing structure, confirm construction details, identify defects or constraints, and reduce assumptions in the design. This leads to safer and more reliable outcomes.

Typically we’ll ask for a brief description of the proposed works, any drawings or sketches you have, photos of the affected areas, and the property address.

If you don’t have everything, we can guide you through what’s needed.

Yes. Structural Engineers can provide structural calculations alongside beam layouts, foundation plans, and construction details.

These are often required by Building Control and used by builders on site.

Installing structural elements without calculations or Building Control approval can result in compliance issues, delays when selling or remortgaging, excessive deflection, cracking, or the need for remedial works.

It may also leave the homeowner without professional liability cover if problems arise.