Kitchen
renovation
in Harpenden, AL5
Designers, Architects, Engineers & Builders Under One Roof.
One Studio. One Contract. One Team.
A Harpenden kitchen renovation is usually decided by three things behind the units: the wall you want to open, the route for the extract, and where the drains can run.
A Harpenden kitchen is likely to sit in a house built between the 1890s and the 1950s: a semi-detached pair on Luton Road, a red-brick house in the Avenues, a 1930s house off West Common Way, or a railway terrace near the Common. Joining a kitchen to the room beside it usually means altering a wall that carries something, and where houses are paired or terraced that wall may meet the one shared with next door.
So the structure, the extract route and the drainage are planned before the units are chosen. In an older house those three decide where a kitchen can go.
Building regulations for a Harpenden kitchen
The government's guidance says you must check whether approval is needed before changing a building in certain ways, and that many alteration projects need it. If the answer is unclear, its advice is to ask a building control body.
For a Harpenden address that body is the St Albans and Watford shared building control service, unless you engage a private registered building control approver instead, in which event the approver notifies the council by an initial notice. Our London team, in-house architects, designers and structural engineers working with Hampstead Chartered Surveyors & Building Consultancy, takes the kitchen from survey to sign-off, and any planning element goes to St Albans City and District Council.
Part P treats a new circuit as notifiable, so a cooker wired on a circuit of its own must be certified, while fitting a built-in cooker to a circuit already there is not notifiable. Work by an electrician who is a member of a competent person scheme is certified by that electrician, with no separate application.
We treat taking out any wall as a building regulations matter. Our structural engineer calculates the beam, and where its ends will bear, from what the survey finds above, and the opening is propped and formed before the new kitchen goes in.
Sources: GOV.UK: Building regulations approval - when you need approval; GOV.UK: Building regulations approval (printable guide); St Albans City and District Council: Building control (web page); GOV.UK: Approved Document P: Electrical safety - dwellings, 2013 edition
Cooker hoods and extract fans in a Harpenden kitchen
Approved Document F asks for extract ventilation to the outside in every kitchen. For an intermittent system the minimum rate is 30 litres per second where a cooker hood extracts outside, and 60 litres per second where there is no hood or the hood recirculates.
If the maker of an outside-venting hood gives no fitting height, the document puts it between 650mm and 750mm above the hob; other extract terminals and fans go as high as is practicable in the room.
When an existing kitchen is refurbished, fans and outside-venting hoods already there should be retained or replaced and checked. If the kitchen being refurbished has no ventilation system to begin with, the guidance does not require one, provided the work does not leave the house less compliant than it was; a combustion appliance installed as part of the work means Part J must be considered too.
In practice the duct decides where the hob goes: out through an external wall where the elevation allows, or along the floor void where it does not. We fix that route on the survey drawings before the layout is drawn.
Sources: GOV.UK: Approved Document F, Volume 1: Dwellings, 2021 edition
Glazing and the back of a Harpenden house
A new kitchen often brings new glazing to the garden. New windows and doors may themselves need building regulations approval, and inside the Harpenden Conservation Area the outside of the house is a planning matter too, with new development expected to a high standard of design.
The Local Plan asks work in a conservation area to answer local detailing, wall-to-window ratios among it, in good natural materials that weather well, and the Harpenden Neighbourhood Plan asks that height, scale and design respect local character and heritage.
Some rows are valued precisely because little has changed. The conservation area was extended in 1993 to take in part of Ox Lane, where a row of late Victorian or Edwardian semi-detached houses has been very little altered, and in Tennyson Road white window frames hold the street together.
Water use is part of the brief as well: the neighbourhood plan asks every development to follow best practice in water efficiency, with water efficient fittings and appliances among its examples.
Sources: GOV.UK: Building regulations approval - when you need approval; St Albans City and District Council: Conservation areas (web page); St Albans City and District Council: Conservation Area Character Statement for Harpenden (April 2008); St Albans City and District Council: St Albans Local Plan Part A (adopted 9 September 2026); Harpenden Town Council and Harpenden Rural Parish Council (published by St Albans City and District Council): Harpenden Neighbourhood Plan, version for referendum November 2018, made
Planning a Harpenden kitchen
A kitchen on its own gets the same order of work as a whole house: measured survey, structure, services, and only then the layout and the joinery.
If a new beam is to bear into the party wall with next door, cutting into it means notifying the neighbour, and we prepare that notice with the structural drawings.
The old kitchen is stripped out only once the new units, worktops and appliances have a confirmed delivery, and if you are living in the house, a temporary sink and cooker go into another room.
Outside Harpenden, and in London rather than Hertfordshire: Project example: Primrose Hill, NW1. That project of ours gave a three-storey Regency terrace a bespoke handleless kitchen inside a new side-return infill and full-width rear extension, where a dark, narrow kitchen had been cut off from the garden, as its case study describes.
Sources: GOV.UK: Party walls and building work - work you must tell your neighbour about; GOV.UK: Party walls and building work - overview; Hampstead Renovations: Rear Extension & Kitchen, Primrose Hill NW1 case study
Kitchen Renovation in Harpenden: Questions
Does opening up a kitchen in a Harpenden house need building regulations approval?
It can. The government's guidance says many alteration projects need approval and that you must check before changing a building in certain ways; where it is unclear, ask a building control body. We put any wall removal, with the engineer's beam design, before the St Albans and Watford shared building control service or the private registered approver you choose.
Do new kitchen windows or doors need permission in the Harpenden conservation area?
Wherever the house is, new windows and doors may need building regulations approval. Planning depends on the change and the address: inside the conservation area some permitted development rights do not apply, an Article 4 direction can remove more, and the council expects a high standard of design. We check the route for the house before drawing new openings.
What ventilation does a new kitchen need under the building regulations?
Extract ventilation to the outside. For an intermittent system, Approved Document F sets a minimum of 30 litres per second where a cooker hood extracts outside, or 60 litres per second without one. In a refurbished kitchen, existing fans and outside-venting hoods should be retained or replaced and checked to confirm they work.
Do you take on a kitchen on its own in Harpenden, or only whole-house projects?
We take on a kitchen on its own. Our London team plans its structure, extract, drainage and wiring as carefully as it would in a whole-house job, and if you later want more done, the survey made for the kitchen becomes the start of that brief.
How do you scope and quote a kitchen renovation in Harpenden?
From the measured survey and the structural and services design, we write a scope listing strip-out, any beam and opening, drainage, extract, electrics, plastering, units, worktops and finishes. The price is built from that list, with anything that needs approval marked so you can see where the decisions lie.
What happens at a feasibility visit about a Harpenden kitchen?
We look at the walls you want to open and what sits above them, where the drains and gas run, and which way an extract duct could get out of the building. We also confirm, on the council's mapping, whether the house is in the conservation area or covered by an Article 4 direction, because that affects new windows and doors.
Book a free feasibility visit
Request a visit
Completed renovation project example
