Station Road, Harpenden
Two-storey side and rear extension.
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Harpenden extension design needs to consider the existing roofline, garden trees and the relationship to adjoining plots. A rear kitchen extension and a loft conversion place different demands on access, daylight and the house’s structure.
With more than 20 years' experience and a 95% planning approval rate, we help homeowners work through the design and planning context for their property. Fixed-fee design packages start from £1,950 + VAT.
Office: Suite 14, STANTA Business Centre, St Albans AL3 6PF
Phone: 01722 548911
Contact our St Albans office to discuss your Harpenden address.
Test stair access, roof structure and usable headroom before choosing a loft layout for your Harpenden home.
From £1,950 + VAT
Compare a rear kitchen extension with a two-storey addition, considering neighbouring windows, roof form and garden access.
From £1,950 + VAT
We consider the property, proposal and applicable St Albans City & District Council guidance when reviewing a planning route.
From £1,950 + VAT
Harpenden includes conservation areas and a mix of period and later family homes. Where a property has a designation or specific planning constraint, the relevant policy and permitted-development position should be checked against the address and proposal before options are settled.
Harpenden's leafy streets, Common and established family housing create a distinctive local setting. Rear additions often need to balance indoor space with garden use, daylight and the relationship to neighbouring homes; plot conditions and any relevant designation should guide the design.
Harpenden's period streets, detached family homes and mature garden plots require attention to rooflines, tree constraints and the relationship between an extension and adjoining gardens.
Check current St Albans City & District Council planning guidance
Meet our St Albans architectural design practice and see local projects
Pre-Build from £1,950 + VAT; Premium £2,950 + VAT; Premium Plus £3,950 + VAT. Compare the existing package scope. Building work and statutory fees are separate. Structural calculations are prepared by an independent qualified structural engineer.
Public council planning decisions
Updated 10 October 2026
In the 12 months to 10 October 2026, St Albans City and District Council decided 171 householder home-improvement applications near Harpenden in the cached public records — 154 approved.
Two-storey side and rear extension.
Two-storey side and rear extension; Porch works.
Single-storey extension.
Single-storey front and side and rear extension.
Two-storey side extension; Garage conversion.
Two-storey side and rear extension.
Two-storey side and rear extension.
Two-storey front and side and rear extension; Porch works.
These are public council decisions about other people’s applications. They are not Hampshire Build projects and do not predict the outcome of your project.