Double Storey Extension Drawings in Barnsbury N1
Fixed-fee, MCIAT-chartered double storey extension drawings for Barnsbury (N1) homeowners — London Borough of Islington validation and local constraints handled from the start.
Barnsbury (N1) is Georgian and early-Victorian terraces and garden squares, much of it in flats, so typical work spans rear and closet-wing extensions, basement and lower-ground projects, and internal reconfigurations that respect the historic plan form.
As one of Islington's most tightly conserved areas, Barnsbury demands careful treatment of frontages, railings, rooflines and rear elevations — we match the period detail and prepare the heritage and design justification Islington Council expects, mindful of the Regent's Canal setting nearby.
Planning in Barnsbury (N1): what to know before you apply
No published householder Article 4 direction is relied upon here, but the Barnsbury conservation area imposes rigorous control of frontages, rear closet wings and basement excavation; flat subdivision and neighbour amenity further constrain rear and lower-ground works.
Typical Barnsbury housing stock
Elegant Georgian and early-Victorian terraces and garden squares — around Gibson Square and the surrounding streets — many subdivided into flats and maisonettes. Original closet wings, lightwells and long rear gardens shape the scope for extensions and basement projects.
Streets we regularly draw for in Barnsbury
Gibson Square · Cross Street · Barnsbury Street · Offord Road
Double Storey Extension Drawings for Barnsbury (N1) homes: the package and the process
Every double storey extension drawings we prepare for an Barnsbury property is drawn to London Borough of Islington’s validation standards and tuned to the N1 constraints above. Here is what the drawing package covers and how the process runs from first survey to approval.
A double storey extension builds a second floor above a single-storey side or rear addition, typically adding a bedroom and bathroom upstairs over a widened kitchen or reception room below. Because the foundations and roof of a single-storey extension already carry most of the fixed cost of building, adding a floor on top is often the most cost-effective way to gain two rooms rather than two separate projects. The trade-off is scrutiny: a two-storey addition sits closer to eye level with neighbouring windows and gardens, so councils examine massing, roofline and boundary distance more closely than they would a single-storey extension.
DrawingsDirect draws double storey side and rear extensions for full planning and building regulations, with structural calculations for the additional floor load and foundations produced in-house by our MCIAT-chartered team, on a fixed fee. If a single storey is enough, see our Rear Extension and Side Return Extension pages, or combine both with a Wraparound if you are extending sideways as well as up.
Do I need planning permission for a double storey extension in London?
Almost always. Permitted development rights for two-storey extensions are far more restrictive than for single-storey work, particularly on how close the new structure can come to a boundary and how closely its roof pitch and eaves height must match the existing house, so most double storey projects are drawn and submitted as full householder planning applications rather than relying on permitted development.
Where the property sits in a conservation area or is subject to an Article 4 direction, any remaining permitted development allowance for a second storey is typically removed entirely, reinforcing the need for a full application. We check your property's status and your borough's design guidance before drawing.
How do councils control the impact of a double storey extension on neighbours?
Because a second storey introduces new windows and massing at first-floor level, London boroughs apply design guidance aimed specifically at protecting neighbouring light, privacy and outlook.
- The 45-degree rule, tested at neighbouring windows, to check the extension does not block an unreasonable amount of daylight
- A common design expectation that a two-storey side extension is set in roughly 1 metre from the shared boundary, rather than built hard against it
- A first floor commonly set back from the ground floor front elevation, so the upper storey reads as subordinate to the main house from the street
- Obscure or high-level glazing on flank walls facing directly into a neighbour's garden or windows, to limit overlooking
| Option | What it adds | Typical fee |
|---|---|---|
| Single-storey rear extension | A ground-floor kitchen-diner only, may qualify for permitted development | see Rear Extension Drawings, from £1,100 |
| Double storey side or rear extension | Two rooms across two floors, usually needs full planning | Full Planning pack ~£1,600–£2,400 |
| Double storey + Building Regulations (structural) | Combined pack including structural calculations for two-floor loads and foundations | Planning + Building Regs pack ~£2,200–£3,850 |
| Wraparound (rear + side return) | Combines two single-storey extensions into one L-shaped ground floor | see Wraparound Extension Drawings, from £2,200 |
Double Storey Extension Drawings in Barnsbury N1 — FAQs
How much does a double storey extension cost to design in London?+
Do I need planning permission to add a second storey?+
Will a double storey extension overlook my neighbour's garden?+
Do I need an architect for a double storey extension?+
How long does it take to get double storey extension drawings?+
Do I need planning permission for an extension or loft in Islington?+
My Islington property is a converted flat — can I still extend?+
How does Islington's tight plot size affect what I can build?+
How long does Islington Council take to decide?+
How much do planning drawings cost in Islington?+
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Tell us your Barnsbury (N1) address and ambition — we'll confirm feasibility, local constraints and a fixed fee within one working day.