How to hire
Match the professional to the job first. A structural engineer sizes beams, foundations and supports and produces the calculations building control signs off; an architect draws up how the space looks and fits together, often working from the engineer's measurements; a building surveyor reports on condition rather than designing new structure [1]. For an extension you will typically use an architect and an engineer together. When you first enquire, say which wall is coming out, which rooms are affected and what you want to build.
Treat any load-bearing alteration as notifiable work. Removing or altering a load-bearing wall needs Building Regulations consent, with the engineer's design and calculations submitted as part of the application [6]. In Telford you have two routes: a full-plans application with drawings and structural calculations checked before you start, ending in an approval notice, or a building notice for minor works such as taking out an internal load-bearing wall, where work can begin two days after a valid application is accepted [5]. Talk to Telford & Wrekin Building Control before you start if you are unsure which route fits.
Telford adds a planning layer worth checking early. The borough holds eight conservation areas, including Wellington and the Severn Gorge, where works that need no permission elsewhere can need consent [9]. Inside the Ironbridge Gorge World Heritage Site an Article 4 Direction withdraws some permitted development rights for houses, reaching items from windows and doors to extensions and outbuildings [13]. The council runs pre-application advice and planning surgeries for Gorge residents, and a Lawful Development Certificate settles whether a proposal needs permission at all [10] [11]. Whatever planning says, building-regulations approval can still apply, so contact Building Control before work starts [12].
Check competence before you book. There is no mandatory register for structural engineers, so membership of the Institution of Structural Engineers or the Institution of Civil Engineers is evidence of professional standing rather than a legal badge. Search the IStructE find-an-engineer service for firms near you and its members directory to confirm an individual's membership and continuing professional development record [3]. Chartered Engineer status sits on the Engineering Council's national register, assessed through licensed institutions [8]. Ask for the engineer's name, grade and membership details, then confirm them yourself rather than taking a logo at face value.
Ask about professional indemnity insurance before you instruct anyone. The IStructE code expects members to tell clients where such cover is not in place or is inadequate for the job, so a straight answer here is part of professional behaviour [4]. Get the insurer, the cover level and what the policy covers confirmed in writing alongside the fee. Firms that publish no insurance detail can still hold cover; the gap is that you cannot see it until you ask.
Get two or three fixed-fee quotes on the same written scope, so you compare like with like. Each quote should separate the site visit, the calculations, the drawings, liaison with building control and VAT, and name what counts as an extra — revisits, redesigns and site inspections during construction often sit outside the headline fee [1] [2]. Fixed fees suit defined jobs such as a beam calculation, while hourly billing only fits genuinely open-ended investigation, so agree a cap before you start [2]. Treat an outlier far above or below the rest as a question rather than a bargain.
Mind the neighbours in Telford's semis and terraces. Work to a shared wall, cutting into it or digging below a neighbour's foundations falls under the Party Wall Act, which requires you to give adjoining owners notice in the set form before work starts [7]. The Act sits apart from planning permission and building regulations approval, so allow time for agreement or a surveyor-led resolution alongside your other applications [7]. Tell your engineer where the boundaries lie at the first visit.
Close the job on paper, not a handshake. Your engineer should deliver signed calculations and drawings your building control surveyor accepts, and the surveyor inspects the steelwork and bearings at the key stages before issuing a completion certificate [5] [6]. Telford & Wrekin recommends holding that certificate before making final payment, and you will need it when you sell or re-mortgage [5]. File the calcs, the certificate, the invoice and any party-wall paperwork with your house deeds.
A typical job runs in one order. First contact sets the scope: which spans are involved, drawings or photos of the structure, access details and whether you need calculations only or drawings and liaison too. That scope goes to two or three firms for fixed written quotes on identical terms. Once instructed, the engineer surveys and produces signed calculations and drawings while the building-control route runs alongside, and party-wall notices go out where neighbours share the structure [1] [2] [5] [7]. Stage inspections follow as the steel goes in, and the completion certificate closes the job before final payment [5].
Read the quote for its parts, not just its total. It should separate the visit, the calculations, the drawings, liaison with building control and VAT, and name what counts as an extra, since revisits, redesigns and site inspections during the build commonly sit outside the headline fee [1] [2]. The closing pack should hold signed calculations and drawings the surveyor accepts, the completion certificate, the invoice and any party-wall paperwork, filed with the house deeds for resale or re-mortgage [5] [6].
Pricing
As of summer 2026, published cost guides put a single beam or RSJ calculation at around £200, with load-bearing wall work averaging £400 [1]. MyBuilder's range runs £60–£950 depending on complexity, with a basic inspection at £175–£300 [2]. A structural survey typically costs £400–£1,000 and a written report £500–£2,000 depending on depth [2].
Full design work costs more because it carries drawings as well as calcs. Checkatrade's guide puts design work at £2,000 for a basic project and £10,000 for a complex one, with hourly rates of £100–£200 where the scope cannot be fixed up front [1]. MyBuilder similarly quotes £90–£200 an hour and advises agreeing a cap before work starts [2]. For a defined job such as one beam, always press for a fixed fee rather than open-ended hourly billing.
What moves the price is no mystery: the complexity of the structure, the size of the project and the property, and the type of job all shift the fee, with assessments cheaper than full design and larger homes costlier to inspect than small flats [1]. Intrusive investigation, extra site visits and liaison beyond the agreed scope add to the bill, so ask what sits outside the headline figure before you agree anything [1] [2].
Ask whether VAT sits on top of the quoted fee and whether building-control application and inspection fees are included, since guide prices and engineer quotes rarely bundle them. Telford & Wrekin quotes its building-control fees per job, so get that figure alongside the engineer's fee [5]. Get the scope in writing before work starts — calcs, drawings, visits, who answers building-control queries, and what triggers an extra charge — and agree payment stages with the balance due on the completion certificate [5].
Structural investigation and repair quotes work differently from single-beam calcs. An inspection that opens up structure or monitors cracking takes longer on site and can need a return visit, which is why guides separate basic inspections from deeper surveys and written reports [2]. Repair and strengthening schemes are scoped per project, so the specification, access to the structure and the scale of the works move the fee more than any headline rate. Where the brief cannot be fixed up front, hourly billing fits, and the guides advise agreeing a cap before work starts [1] [2].
Red flags
Sizes a beam or prices steelwork without visiting, asking for spans and drawings, or requesting photos of the structure.
Cannot name the engineer behind the calculations or give IStructE or ICE membership details you can check yourself [3].
Starts structural work with no Building Regulations application in place [5] [6].
Will not confirm professional indemnity insurance and its cover level in writing [4].
Quotes one fixed price with no breakdown of the visit, calculations, drawings and VAT [1] [2].
Asks for full payment before the signed calculations are delivered and the completion certificate is issued [5].
Dismisses visible cracking or bowing as just settlement without measuring, monitoring or putting the assessment in writing [2].
Treats planning permission and building-regulations approval as the same thing, or says a load-bearing alteration needs neither [11] [12].
Will not put the fee, the scope and what counts as an extra in writing before starting.