Builders in Hertfordshire

GS Renovation Ltd's registered office is at 3 Chauncy Avenue, Potters Bar, EN6 5LE, in Hertsmere. That puts much of south Hertfordshire within a short drive: Borehamwood, Hatfield, Radlett, Cheshunt, Welwyn Garden City and St Albans are all within about eight miles of the office. We work in the 20 Hertfordshire towns in the table below, as well as across London.

The firm is run by Abdelaaziz Saaid. GS Renovation Ltd was incorporated in 2023 to formalise a trade he had already run for years. We are a building contractor with a structural specialism: we install the steel beams and take out the load-bearing walls ourselves. We are not structural engineers. On any structural work the structural engineer we appoint designs and sizes the steel, we build to that design, and building control inspects and signs the work off.

Hertfordshire towns we work in

Each town links to its own page, with the local housing, planning and cost detail. The planning authority is the district or borough council for your address; the building control column shows who normally inspects there.

Town	Postcodes	From our Potters Bar office	Planning authority	Building control
Potters Bar	EN6	at our office	Hertsmere Borough Council	Hertfordshire Building Control
Borehamwood	WD6	about 4 miles	Hertsmere Borough Council	Hertfordshire Building Control
Hatfield	AL10, AL9	about 5 miles	Welwyn Hatfield Borough Council	Hertfordshire Building Control
Radlett	WD7	about 6 miles	Hertsmere Borough Council	Hertfordshire Building Control
Cheshunt	EN8, EN7	about 7 miles	Broxbourne Borough Council	Hertfordshire Building Control
Welwyn Garden City	AL7, AL8	about 7 miles	Welwyn Hatfield Borough Council	Hertfordshire Building Control
St Albans	AL1, AL2, AL3, AL4	about 7 miles	St Albans City and District Council	St Albans and Watford building control
Hertford	SG13, SG14	about 8 miles	East Herts District Council	Hertfordshire Building Control
Watford	WD17, WD18, WD19, WD24, WD25	about 9 miles	Watford Borough Council	St Albans and Watford building control
Ware	SG12	about 10 miles	East Herts District Council	Hertfordshire Building Control
Harpenden	AL5	about 11 miles	St Albans City and District Council	St Albans and Watford building control
Hemel Hempstead	HP1, HP2, HP3	about 12 miles	Dacorum Borough Council	Hertfordshire Building Control
Rickmansworth	WD3, HA6	about 13 miles	Three Rivers District Council	Hertfordshire Building Control
Stevenage	SG1, SG2	about 14 miles	Stevenage Borough Council	Hertfordshire Building Control
Berkhamsted	HP4	about 17 miles	Dacorum Borough Council	Hertfordshire Building Control
Hitchin	SG5, SG4	about 18 miles	North Hertfordshire District Council	Hertfordshire Building Control
Bishop's Stortford	CM23	about 19 miles	East Herts District Council	Hertfordshire Building Control
Letchworth Garden City	SG6	about 19 miles	North Hertfordshire District Council	Hertfordshire Building Control
Tring	HP23	about 21 miles	Dacorum Borough Council	Hertfordshire Building Control
Royston	SG8	about 25 miles	North Hertfordshire District Council	Hertfordshire Building Control

Distances are approximate miles from our registered office at EN6 5LE. Planning authority and building control as recorded for each town on its own pages.

Building control in Hertfordshire

Most Hertfordshire councils do not run building control in house. Their service is Hertfordshire Building Control, a company owned by eight councils: Broxbourne, Dacorum, East Herts, Hertsmere, North Herts, Stevenage, Three Rivers and Welwyn Hatfield. St Albans and Watford are different: St Albans City and District Council runs a shared building control service with Watford Borough Council. In either case you can instead use a registered building control approver. Whichever body it is, it inspects the work at the set stages and issues the completion certificate, not the builder and not the engineer.

Planning for building work in Hertfordshire

Planning sits with the district or borough council shown in the table. Taking out a load-bearing wall or a chimney breast is a building regulations matter, not a planning one, unless the house is listed, when listed building consent covers internal work too and doing it without consent is a criminal offence. A single storey rear extension can be permitted development within the limits, including in a conservation area, unless an Article 4 direction removes it; side extensions, two storey rear extensions and roof extensions in a conservation area need planning permission. Flats have no householder permitted development. Some Hertfordshire councils, Welwyn Hatfield among them, have Article 4 directions, so check your council's Article 4 list before any drawings are commissioned.

Where the work cuts into a shared wall, the Party Wall Act applies. You serve the party wall notice as building owner (or your surveyor does); we give you the drawings and programme it needs and build to any award.

What building work costs in Hertfordshire

The ranges below are the London figures we publish across the site. Hertfordshire work generally runs below them, and every job is priced from a site survey, itemised, with no obligation.

Type of work	What it covers	Typical London cost
Steel beam over one opening	Beam, padstones, installation, building control. The engineer's fee sits in the knock-through figure	£1,500 to £4,000
Full knock-through	Wall removal, beam, engineer's fee, propping and making good	£2,500 to £6,500+
Chimney breast removal	One floor. A steel beam is the usual route; gallows brackets only where the engineer and building control accept them	£2,200 to £3,250 on a steel beam; £1,500 to £2,500 where brackets are accepted
Kitchen renovation, mid-range	Quality units, stone worktops, integrated appliances, new layout	£20,000 to £40,000
Bathroom renovation, mid-range	Quality suite, porcelain tiling, new layout, heated rail	£7,500 to £12,000
Full refurbishment, mid-range	Strip out, rewire, replumb, heating, kitchen, bathrooms, decoration	£1,500 to £2,200 per m²
Single storey extension	Standard finish, per m² of new floor area	£2,000 to £2,800 per m²

Indicative London ranges, MyBuilder and Checkatrade, 2026. Hertfordshire work generally runs below the London figures; your price follows a site visit.

Our services near Potters Bar

Every service we offer has its own Potters Bar page, the town our office is in.

• RSJ and Steel Beam Installation Potters Bar
• Load-Bearing Wall Removal Potters Bar
• Structural Alterations Potters Bar
• Chimney Breast Removal Potters Bar
• Open-Plan Conversions Potters Bar
• House Extensions Potters Bar
• Home Renovation Potters Bar
• Kitchen Renovation Potters Bar
• Bathroom Renovation Potters Bar
• Kitchen Extensions Potters Bar
• House Refurbishment Potters Bar
• Flat Refurbishment Potters Bar
• Office Fit-Out Potters Bar
• Commercial Fit-Out Potters Bar
• Flat Conversions Potters Bar
• HMO Conversions Potters Bar

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Prices are indicative and every quotation follows a site survey. Structural design is by the consulting engineer appointed to your project.