Skip to main content
📍 Serving London, Harrow, Watford & Surrounding Counties
Work Hours: Mon - Sat, 9am - 6pm
info@gndevelopers.co.uk 07575 750004
Contractor Certainty

How We Manage Your Residential Build

We eliminate domestic building stress through a structured 5-stage project management framework designed for complete transparency, safety, and milestone precision.

01

Stage One • Discovery & Feasibility

On-Site Consultation & Structural Feasibility

Our Senior Project Surveyor visits your property to inspect existing structures, assess drainage runs, review party wall positions, and measure boundary clearances. We review your architectural drawings (or establish your design requirements) and evaluate permitted development rights vs. full planning constraints.
Key Deliverable: Initial feasibility confirmation, structural assessment, and preliminary budget boundaries.
Duration: 1-2 Days from initial enquiry.

02

Stage Two • Pricing & Contract

Line-Item Fixed-Price Tender & Milestone Contract

We produce a comprehensive, fully itemised quotation. Every single trade cost—groundworks, concrete foundations, structural steel, masonry, joinery, plumbing, and electrical—is explicitly itemised with associated material specifications. You receive a formal JCT or FMB Building Contract with a stage-payment schedule linked directly to completed physical milestones.
Key Deliverable: Transparent, fixed-price contract with scheduled milestone payment dates. Zero lump-sum guessing.
Deposit Required: Nominal mobilisation deposit only. Balance paid on verified stage completion.

03

Stage Three • Technical Mobilisation

Technical Preparation, Party Wall & Building Control Notice

Before breaking ground, we ensure all regulatory and technical conditions are resolved. We submit Building Control Initial Notices, coordinate structural engineer calculation packs, assist with Party Wall Surveyor awards, submit Thames Water Build-Over notifications, and prepare the Construction Phase Health & Safety Plan (CDM 2015).
Key Deliverable: Full Local Authority compliance, building notice approvals, and waste management logistical schedules.

04

Stage Four • The Construction Phase

Active Build, On-Site Management & Stage Inspections

Construction begins under the supervision of your dedicated Full-Time Site Manager. We run clean, safe, and secure working sites with dust-screen protection. Local Authority Building Control inspectors visit at designated statutory inspection points (foundations, damp-proof course, structural steel bearing, and roof insulation).
Communication: Dedicated WhatsApp group, weekly site review meetings, and transparent progress reports.

05

Stage Five • Handover & Certification

Snagging, Building Control Sign-Off & 10-Year Warranty

Upon reaching practical completion, we perform a joint snagging inspection with you to resolve any minor aesthetic touch-ups. We coordinate the final inspection with Building Control, supply your official Completion Certificate, Gas Safe Certificate, Part P Electrical Certificate, and activate your 10-Year Structural Guarantee.
Key Deliverable: Full handover pack containing all legal council certificates, O&M manuals, and structural warranty policies.

Frequently Asked Construction Questions

Answers to common queries regarding building contracts, planning, and site management.

Most single-storey rear extensions fall under Permitted Development rights (extending up to 6m for attached houses or 8m for detached houses under Prior Approval). If your property is in a Conservation Area or has had permitted development rights removed, we prepare and submit full planning applications.

We operate on a transparent milestone-based payment schedule written directly into your contract. For example: Deposit upon site setup, Stage 1 upon foundation concrete pour, Stage 2 upon wall plate/brickwork completion, Stage 3 upon weathertight roof, Stage 4 upon plastering/first fix, and final balance upon Building Control sign-off.

For loft conversions and rear extensions, most clients remain in their property. We erect airtight dust screens and temporary hoarding to seal off the work area. For full back-to-brick refurbishments, temporary relocation is recommended for health, safety, and comfort.

Premier residential construction and domestic developments. Delivering turnkey building solutions across Greater London and surrounding regions.
KEY AREAS COVERED
North & North-West London
Harrow, Pinner & Stanmore
Watford & Hertfordshire
Richmond & Kingston
Surrey & Home Counties
COMPANY INFORMATION
GN Developers Ltd
Registered in England & Wales
Company No: 15530091

Public Liability: ÂŁ10,000,000
© 2026 GN Developers Ltd. All rights reserved. | Company No: 15530091
Designed by