Delta Construction+44 (0) 7479 389 996Request a quote
Loft conversions, extensions and structural work across North London — from L-shape dormers on Victorian terraces in Crouch End to double-storey rears in Barnet's 1930s semis and full refurbishments of Edwardian villas in Muswell Hill.
North London has enormous variety — grand Edwardian detached houses in Muswell Hill and Highgate, tight Victorian terraces in Crouch End and Finchley, sprawling 1930s semis across Barnet and Enfield. Each type demands a different approach to gaining space.
L-shape dormer loft conversions are the signature project in North London's Victorian terraces. In Muswell Hill and Highgate, we more often deliver full-house refurbishments and basement excavations. Barnet and Enfield clients typically want rear extensions and garage conversions.
North London families face a classic dilemma — they love their neighbourhood and their children's school, but the house is too small. A well-designed loft conversion or extension lets them stay put. It's the most common brief we hear.
Single and double-storey rear extensions, side-returns and wrap-arounds.
Mansard, dormer, hip-to-gable and L-shape loft conversions with full sign-off.
Repairs, reroofs, slate, tile, flat roof and leadwork.
Structural openings, repointing, garden walls and period restoration.
Paving, driveways, retaining walls, planters, pergolas and lighting.
Yes — it's our most common loft project across Crouch End, Finchley and Muswell Hill terraces. An L-shape dormer typically adds a double bedroom and en-suite bathroom, gaining 25–35sqm of usable floor space.
Most loft conversions in Barnet fall under permitted development rights, meaning no planning application is needed. However, we always check and secure a Lawful Development Certificate to protect your investment.
An L-shape dormer loft in North London typically starts from £82k including VAT. The final price depends on the en-suite specification, staircase design and any structural complications. We provide a fixed-price quote after survey.
Most of the work happens above you. The main disruption is during staircase installation (2–3 days) and first-fix electrical work. You can live in the house throughout — we protect all areas and clean up daily.
Send us the address and a rough brief — a director will reply within one working day with a free, no-obligation quote.