A kitchen renovation is a run of trades through one room: strip out, any structural opening, first fix, plaster, units, second fix. GS Renovation runs the whole sequence as one contractor, appoints a structural engineer where a wall or an opening is involved, and coordinates building control. Quotations are free and carry no obligation.
Who inspects the drainage in a new kitchen
Building control for Welwyn Hatfield is delivered by Hertfordshire Building Control, which is owned by eight local authorities including Welwyn Hatfield Borough Council. Hertfordshire Building Control names drainage as one of the items its inspectors examine on site.
That matters as soon as a sink, an appliance or a waste run moves. Drainage alterations and electrical work fall under the building regulations even where the rest of a refit does not, so the notifiable parts are identified at quotation stage rather than discovered halfway through.
Making the kitchen bigger
Two routes make a kitchen bigger: take out a wall, or extend. Welwyn Hatfield Borough Council states that permitted development rights apply to houses and do not apply to flats, maisonettes, mobile homes, caravans or other buildings, so the starting point differs with the property. A full knock-through, including the wall removal, the engineer's fee and making good, runs from £2,500 to £6,500 and above (indicative London ranges, MyBuilder and Checkatrade, 2026).
- Floor levelling and screeding before the flooring goes down
- Bespoke kitchen design and 3D layout planning
- Pantry, larder and utility room integration
- Sink, tap and filter installation with full leak testing
- Underfloor heating and kitchen ventilation
The GS Renovation Difference in Hatfield
A kitchen goes wrong in the joins between trades rather than inside them. The structural opening, the drainage move, the electrics, the plastering and the units all have to arrive in the right order, and a unit run cannot be set out until the opening above it is final. We hold that sequence as one contractor with one point of contact, so nobody is waiting on a trade that has already left. We are fully insured, and building control applications and inspections are coordinated.
- Materials priced at options, so you choose the finish
- Second fix carpentry and decorating finished by the same team
- Appliance and extraction routes agreed at design stage
- Suppliers used across every budget, with options priced
- Dust screens and floor protection in occupied homes
- Aftercare and snagging support once the job is finished