Loft Conversions in Northwood
Add a bedroom, bathroom or home office to your Northwood home. One team, fixed price, full Building Regulations management.
- Loft survey and feasibility assessment (free)
- Structural design and engineer's calculations
- Party Wall agreements where required
- Building Regulations application and stage inspections
- Steel beam installation and structural alterations
- Roof modifications (dormer or Velux)
- Insulation to Building Regulations standard
- New staircase designed around your floor plan
- First and second fix electrics, lighting and heating
- En-suite bathroom (if in scope)
- Plastering, flooring and full internal finish
- Building Control completion certificate
A loft conversion is one of the most cost-effective ways to add space to a Northwood home — particularly for the area's larger detached and semi-detached houses, which often have generous loft space that converts well.
Lavington Build carries out loft conversions across Northwood, Ruislip, Eastcote, Pinner, Harrow and Gerrard's Cross. We manage the entire project — structural design, Building Regulations, staircase, fit-out — so you have one quote, one team and one contact from start to finish.
Northwood (HA6), Ruislip, Eastcote, Pinner, Harrow, Gerrard's Cross, Iver, Denham, Harefield
Survey before quote. We assess your specific roof structure before pricing.
Fixed price. No open-ended day rates.
Party Wall handled. We manage notices and keep the process clean.
Full Building Regs management. Application to completion certificate.
Fully insured. Public liability cover on every project.
How much does a loft conversion cost in Northwood?
Between £35,000 and £65,000. A Velux starts at £30,000–£40,000. A dormer runs £40,000–£55,000. Adding an en-suite adds £6,000–£10,000.
Do I need planning permission?
Most fall under Permitted Development. We confirm your position during the free survey.
How long does a loft conversion take?
A dormer takes 8–12 weeks. A Velux 4–6 weeks.
Does a loft conversion add value?
Yes — adding a bedroom and bathroom typically adds 15–25% to property value.
Get in touch for a free loft survey and fixed written quote. We cover Northwood, Ruislip, Eastcote, Pinner, Gerrard's Cross and surrounding West London areas. We reply within 1 working day.