Mixed Georgian + post-war. Planning authority: Welwyn Hatfield BC.
We prepare architectural drawings across Hatfield and the surrounding area — Old Hatfield, Birchwood, South Hatfield and the University of Hertfordshire quarter and the streets between them. The stock here is largely Georgian houses in Old Hatfield beside extensive post-war New Town estates and modern student and family developments, and we draw for every one of those types for submission to Welwyn Hatfield Borough Council.
Old Hatfield is a tightly-controlled conservation area beside the Grade I registered Hatfield House park, so heritage-led design is essential there, while the New Town estates and later suburbs are the everyday home-extension and loft-conversion territory decided by Welwyn Hatfield. Whichever route your address falls under, we confirm it free at the measured survey and design to match the local Hertfordshire streetscape — from period rear and side-return extensions to rear-dormer and mansard loft conversions.
Full planning submission — existing and proposed plans, elevations, site plan and Design & Access Statement.
Construction-detail drawings for your builder and Building Control sign-off.
Rear-dormer, hip-to-gable, L-shape and mansard loft-conversion drawings.
Single-storey, double-storey, wrap-around and side-return extension drawings.
Full mansard conversion drawings with structural and thermal detailing.
Every householder application in Hatfield is decided by Welwyn Hatfield Borough Council, with a statutory 8-week determination. Allow around 12–14 weeks from first call to decision once the measured survey, design and validation are included. We research the council's Local Plan and recent decisions before drawing, and we hold a 98% first-time approval rate across our work.
Direct answers to what homeowners in Hatfield ask about drawings, permission and fees.
Yes. Hatfield (AL9, AL10, Hertfordshire) is well within our 50-mile service radius from our central London office — about 20 miles out, 22 min from London King's Cross. Every project includes an in-person measured survey at your property, so you are never charged mileage. We submit to Welwyn Hatfield Borough Council through the Planning Portal.
Around Old Hatfield, Birchwood, South Hatfield and the University of Hertfordshire quarter, the stock is largely Georgian houses in Old Hatfield beside extensive post-war New Town estates and modern student and family developments. We prepare planning and building-regulations drawings for every period represented, designed to match the local streetscape and satisfy Welwyn Hatfield Borough Council.
It depends on your exact address. Many single-storey rear and side-return extensions on unlisted houses fall under Permitted Development, but Old Hatfield is a tightly-controlled conservation area beside the Grade I registered Hatfield House park, so heritage-led design is essential there, while the New Town estates and later suburbs are the everyday home-extension and loft-conversion territory decided by Welwyn Hatfield. Listed buildings, flats and conservation-area properties always need full planning, decided by Welwyn Hatfield Borough Council. We confirm exactly which route applies to your home, free, at the survey.
Welwyn Hatfield Borough Council determines householder applications in 8 weeks; allow around 12–14 weeks end to end once the survey, design and validation are included. We hold a 98% first-time approval rate.
Local policy varies more between adjoining boroughs than most owners expect. Full service detail for Welwyn Garden City, Potters Bar and All commuter towns.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
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