RSJ and Steel Beam Installation Brentwood

Take out a wall, or a section of one, and the load above needs a steel beam to sit on: that beam is the RSJ. On a Brentwood job we cover the survey, props, beam, padstones and making good, and we arrange the building control inspections. A structural engineer we appoint writes the calculations, and we install to them. We never produce those calculations ourselves. This page sets out what an RSJ job on a Brentwood property involves, and who checks it.

For Brentwood, on London-derived ranges a steel beam for one opening typically costs £1,500 to £4,000 fitted and signed off, or £2,500 to £6,500 or more for a full knock-through with the engineer's fee and making good; Essex work generally runs below that. GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Brentwood.

How the job runs

1. Free site survey at your Brentwood address and an itemised quote.
2. The engineer we appoint sizes the beam, and the work is registered with Brentwood Borough Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
3. Props go in, the opening is cut and the beam is set on padstones, packed tight above.
4. Building control inspects the steel before it is covered. We make good, and the completion certificate follows.

A Brentwood beam is notified to the council by portal or by email

Building regulations applications in Brentwood can be submitted through the My Brentwood portal at my.brentwood.gov.uk. The forms can also be downloaded as PDFs and emailed to buildingsurveying@brentwood.gov.uk. We make that submission and keep the correspondence, so you are not chasing paperwork while the props are holding your ceiling up.

Structural beams and columns prior to encasement are one of the inspection stages Brentwood Borough Council publishes for building control. Your steel is therefore looked at before it is boxed in or plastered over. We programme the plastering around that inspection rather than the other way round, because a beam covered too early has to be uncovered again.

Housing in Brentwood

Count the homes in Brentwood and you get about 25,620: 78% built since 1945, 11% between the wars and 11% before 1919, with flats at 32% and houses at 68%. Semi-detached houses make up 21% of homes here, and a beam bearing on the shared wall of a semi in Brentwood means one party wall notice.

Behind a High Street front in Brentwood there can be a timber frame

Remains of timber frames survive behind the 19th century fronts of 108 to 114 Brentwood High Street, the council's conservation area appraisal records. The appraisal thinks it probable that later brickwork conceals other survivals along the High Street. Those four properties are all grade II listed and all timber framed.

Rebuilding 101 to 105 Brentwood High Street uncovered the unsuspected remains of a significant timber framed building, which survived only at first floor level. The appraisal dates that building to 1615. A frame changes where a beam can bear and how load passes down to the ground. Before any section is sized, we expose the structure and record it for the engineer.

The ground under the town centre ridge is layered, so a bearing has to reach something able to take it

Brentwood town centre stands on a ridge of high ground formed by the Claygate Beds and Bagshot Sands overlying the London Clay. Whatever stands above a steel beam is focused onto two small bearing points, and the structure beneath must carry that down to ground able to take it.

If a new pier or pad foundation is called for, we establish what lies under it before any steel is ordered. We dig the trial hole, record what comes out of it and pass that to the engineer. The section size follows from that, not from a standard detail.

• Flitch beams where a slimmer steel and timber solution suits
• Beam boxing, fire protection and plasterboard encasement
• Party wall process explained, and the beam built to the award

VOA Council Tax stock of properties, March 2025, for all 6 statistical areas in Brentwood. Counts rounded by the VOA.

Plenty of Brentwood projects start with one job and grow, so it helps to see home renovation in Brentwood, RSJ and steel beam installation in Hornchurch, London builders who fit steel, party walls and steel beams, RSJ and steel beam installation anywhere in London and Party Wall Act Explained.

Why Brentwood Homeowners Choose GS Renovation

GS Renovation is the builder here, not the engineer. On a Brentwood beam the engineer is appointed by us, the work follows their calculations, and propping stays in place until the steel is fitted and bearing correctly. The building control submission and the inspection bookings are ours to make, and the beam is presented for inspection before anything encases it. You deal with one person throughout, whether the question is steel, brickwork, the engineer or sign off. We carry full insurance and hold a 4.9 rating from 31 MyBuilder reviews. Quotations are free and carry no obligation.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.