Loft Conversion Drawings in Hayes | From £1,225

No Article 4 Direction covers Hillingdon, which keeps the Hayes permitted-development route open on unlisted houses. Hayes reads as 1930s semi-detached, post-war, and that character is precisely what a Hillingdon Council case officer tests a proposal against. A UB3 property inside Ruislip Village loses part of its permitted development and generally goes to Hillingdon Council in full. Designation status for the UB3 address is established first.

Before drawing anything for Hayes, we check Article 4 directions against the UB3 boundary. On Hayes stock the constraint is physical before it is planning: the 1930s semi-detached fixes the rear wall line and the Hayes & Harlington roofline caps the ridge. The borough policy layer over every UB3, UB4 address is set out on Hillingdon planning. The Hayes survey then carries into building regulations drawings in Hayes if the project runs on to construction.

Hillingdon Council will not register a Hayes application until validation completes. A surveyor measures the Hayes property before any UB3 design begins.

Statutory periods: 8 weeks from validation for a householder application, 13 weeks for a major scheme, 6 weeks for prior approval with a 21 days neighbour consultation, and 5 weeks for a full plans building control submission. A party structure notice requires one month notice and two months where excavation is involved.

Expect a site visit to the Hayes property during the consultation period. Drawings for Hayes are supplied print-ready and in the format London Borough of Hillingdon accepts.

Neighbour comment is what shapes most Hayes decisions; policy rarely decides alone. The Hayes survey records every opening, level change and structural wall.

Because Hayes houses generally share walls, budget time for party wall notices alongside the UB3, UB4 application. Once consent is granted, house extension drawings follows for the UB3 property.

Hayes is characterised by 1930s semi-detached, post-war estates, concentrated across UB3, UB4 in the Hayes / Harlington area. On Hayes plots, structure follows the 1930s semi-detached that is already there. Reading that across to Hayes stock: the 1930s hipped roof here needs a hip-to-gable before a rear dormer works, which pushes the volume calculation toward the 50 m³ permitted-development ceiling. On Hayes plots that shows up in the section drawings. Height on a Hayes proposal is measured against its neighbours, not against a policy number; the Hayes & Harlington terraces set that datum.

Lower-ground schemes in Hayes answer to neighbours and groundwater. A Hayes survey done once feeds architectural drawings for UB3 properties and planning permission later.

What the Hayes drawing pack contains

The Hayes package covers every sheet London Borough of Hillingdon asks for.

• existing roof plan and section for the Hayes property
• proposed dormer elevations
• volume calculation sheet
• staircase and head-height sections
• structural steel layout

Streets and landmarks we survey around Hayes

• Windsor Safari Park — closet wings that change how a rear extension meets the Windsor Safari Park back addition.
• Minet Country Park — terraced rear elevations — the Minet Country Park party wall position is drawn first.
• Barra Hall Park — gardens deep enough for the 8 weeks householder route on a Barra Hall Park plot.
• Lake Farm Country Park — terraced rear elevations — the Lake Farm Country Park party wall position is drawn first.
• Norman Leddy Memorial Gardens — gardens deep enough for the 8 weeks householder route on a Norman Leddy Memorial Gardens plot.
• Uxbridge Road — closet wings that change how a rear extension meets the Uxbridge Road back addition.
• Barry Lane — roof profiles that set the ridge datum Hillingdon Council measures a Barry Lane dormer against.
• Hayes & Harlington — nearby 1930s semi-detached takes its scale from this frontage.
• Hewens College — Hillingdon Council weighs UB3 sightlines to it in the character assessment.
• Gracie Fields — height and massing nearby are argued against this frontage.
• Barnhill Community High School — nearby 1930s semi-detached takes its scale from this frontage.
• Global Academy — Hillingdon Council weighs UB3 sightlines to it in the character assessment.

Getting to a Hayes survey

Surveyors travel to UB3 addresses from the studio; the nearest stations are Hayes & Harlington, Crystal Palace transmitting station, Paddington, Reading. Appointments are booked in Hayes on weekdays and Saturdays, and the measured survey of a standard 1930s semi-detached takes two to three hours.

Where Hayes sits

Hayes lies 13 miles (21 km) west of Charing Cross, on Ordnance Survey grid reference TQ095805, with the Grand Union Canal shaping drainage and flood-risk questions on lower-lying UB3 plots. We draw the Hayes location and block plans from that reference, which is what Hillingdon Council validates against. Source.

Practical detail for a Hayes submission: access is via Hayes & Harlington and Crystal Palace transmitting station and Paddington and Reading; the Hayes post town is HAYES; dialling code 020; listed buildings around Hayes include Grade II town hall and Grade II War Memorial and Grade II Gramophone Company. Site plans are drawn to the address as Hillingdon Council holds it.

Hayes postcode coverage

Districts covered around Hayes: UB3 (Hayes / Harlington), which Hayes holds on its own; UB4 (Hayes / Yeading), which Hayes holds on its own.

Streets and stations in Hayes

In Hayes that is Windsor Safari Park, Minet Country Park, Barra Hall Park, Lake Farm Country Park, Norman Leddy Memorial Gardens, Uxbridge Road and Barry Lane and the roads off them. most Hayes sites are within walking distance of Hayes & Harlington or Crystal Palace transmitting station or Paddington. and Grade II town hall, Grade II War Memorial, Grade II Gramophone Company are listed, which pulls neighbouring UB3 proposals into a setting assessment.

Areas we cover around Hayes

Neighbouring coverage runs to Ickenham (UB10), Harefield (UB9), Yiewsley (UB7), Eastcote (HA5), Hillingdon (UB10), Harrow on the Hill (HA1); the Hillingdon policy is shared but the stock and the designations are not.

The fee follows the building. On Hayes stock that means party walls, levels, and the Ruislip Village heritage question.

Statutory application fees are set by regulation, not by the council: £548 householder, £610 for a new dwelling, £274 for a lawful development certificate, £249 for prior approval.

Those statutory fees go to London Borough of Hillingdon on submission. London planning approval-rate dataset · Hillingdon planning · loft conversion drawings in London · loft conversion drawings in Ickenham.

A chartered technologist surveys the Hayes property and signs the drawings — the same person, start to finish. We would rather spend on Hillingdon Council advice than lose a Hayes decision and resubmit.

Drawings are produced by chartered members of the Chartered Institute of Architectural Technologists (MCIAT), the professional body for technical design and building-regulations competence. First-time approval across our London caseload is 98%. Statutory fees shown are those in force in England in 2026 under the Town and Country Planning (Fees for Applications) Regulations. Confirm your local authority at gov.uk and submission requirements on the Planning Portal. Studio: 71–75 Shelton Street, London WC2H 9JQ.

Send the Hayes address; we will come back with the route and the fee. This Hayes page was reviewed in August 2026.