Single-storey rear extension onto a garden behind an interwar semi-detached house in Collier Row RM5 in the London Borough of Havering

Collier Row · RM5 · Havering

Building Regulations Drawings in Collier Row RM5

Fixed-fee, MCIAT-chartered building regulations drawings for Collier Row (RM5) homeowners — London Borough of Havering validation and local constraints handled from the start.

Collier Row (RM5) took shape as an interwar suburb of Romford, expanding through the 1920s and 1930s across former Essex farmland. It is a planned residential district rather than a historic village core, with predominantly semi-detached housing, so almost every householder project here is an extension or loft on one of those consistent interwar pairs.

There is no conservation area covering Collier Row — that is a genuine, verified fact, not an omission. Its planning character is instead shaped by the uniformity of its interwar suburban roads and by the London Borough of Havering's householder design expectations, which favour keeping the semi-detached rhythm, the gaps between pairs and the original materials intact. We treat that suburban cohesion, rather than a conservation designation, as the reference point when we design an extension.

Demand for rear extensions, two-storey side extensions and hip-to-gable lofts is steady across roads like Mawney Road, Silvermere Avenue and Victoria Avenue, where regular plots and gardens are typical. We check each property's permitted-development position against Havering's borough-wide controls first, then prepare drawings that either stay within permitted development or are ready to validate as a full householder application.

Proposed floor plan

Collier Row RM5

Collier Row (RM5) — planning at a glance

Council: London Borough of Havering
Postcode district: RM5
Planning portal: View the Havering planning portal
Housing stock: Predominantly interwar semi-detached houses on planned suburban roads, with postwar and modern infill on regular gardened plots. The consistent pairs and generous front and rear gardens are what makes rear extensions, side extensions and hip-to-gable loft conversions the common projects here.
Article 4: No area-specific Article 4 direction is published for Collier Row; the London Borough of Havering's borough-wide permitted-development controls and householder design guidance still apply.
Sample streets: Collier Row Road · Lodge Lane · White Hart Lane · Clockhouse Lane · Mawney Road · Lawns Way · Mashiters Hill · Carter Drive · Ravenswood Close · Hunter's Grove · Silvermere Avenue · Victoria Avenue
Local constraints: Consistent interwar semi-detached street pattern, so front-elevation changes, roof forms and the gap between pairs are assessed against a cohesive suburban rhythm rather than a one-off houseHavering's borough-wide permitted-development limits and householder design guidance govern extension depth, height and coverage — no local Article 4 direction narrows them further in Collier RowMatching original facing brick, render, tile-hanging and roof tiles so a rear or side addition reads as part of the original interwar pair rather than an obvious bolt-onThe characteristic gap between semi-detached pairs, which the council protects so streets do not close up — this shapes how wide a two-storey side extension can be and whether it must be set back and set downRegular but finite plot and garden sizes, which constrain how deep a single-storey rear extension can go before it needs a full householder applicationShared party walls and building lines between paired houses, making party-wall relationships, overshadowing and neighbour amenity relevant to what gets approved

Planning in Collier Row (RM5): what to know before you apply

Because Collier Row's suburban roads repeat so consistently, Havering assess extensions against the established semi-detached pattern, so matching original brick, render and roof form and preserving the gap between pairs matters more than on a mixed-typology road. There is no conservation area and no local Article 4 direction, so many houses retain permitted development rights for rear and loft work — but the finite gardens and shared building lines mean depth, height and neighbour impact are the points a householder application is judged on.

Typical Collier Row housing stock

Predominantly interwar semi-detached houses on planned suburban roads, with postwar and modern infill on regular gardened plots. The consistent pairs and generous front and rear gardens are what makes rear extensions, side extensions and hip-to-gable loft conversions the common projects here.

Streets we regularly draw for in Collier Row

Collier Row Road · Lodge Lane · White Hart Lane · Clockhouse Lane · Mawney Road · Lawns Way · Mashiters Hill · Carter Drive · Ravenswood Close · Hunter's Grove · Silvermere Avenue · Victoria Avenue

Building Regulations Drawings for Collier Row (RM5) homes: the package and the process

Every building regulations drawings we prepare for an Collier Row property is drawn to London Borough of Havering’s validation standards and tuned to the RM5 constraints above. Here is what the drawing package covers and how the process runs from first survey to approval.

Where planning drawings gain design consent, building regulations drawings prove your project meets the technical standards for a safe, warm, structurally sound building. DrawingsDirect produces full-plans building control packages for London extensions, lofts and conversions, with structural calculations produced in-house rather than subcontracted.

What do building regulations drawings cover?

A building control package translates the approved design into a buildable, compliant specification.

Construction sections and detailed junctions
Structural drawings and calculations (steel beams, foundations, loadings)
Part L thermal performance and insulation specification
Fire safety — escape routes, protected structure, alarms
Drainage and ventilation layouts

Full Plans or Building Notice — which should I choose?

A Full Plans application has your drawings checked and approved by Building Control before work starts, giving certainty and a document lenders and buyers like to see. A Building Notice lets simpler work start sooner but is inspected as it proceeds, with less up-front certainty. For most London extensions and loft conversions we recommend Full Plans, and prepare the package accordingly.

Full Plans vs Building Notice for a London project
Factor	Full Plans	Building Notice
Drawings checked before work starts	Yes	No
Up-front certainty	High — approval in writing	Lower — inspected as built
Best for	Extensions, lofts, structural work	Minor, simple works
Evidence for lenders and buyers	Full approval record	Completion certificate only
Risk of costly on-site rework	Low	Higher if issues are found late

Also in Collier Row RM5

Planning Permission Planning Drawings Architectural Drawings Loft Conversion Drawings House Extension Drawings Building Regulations Drawings across Havering Building Regulations Drawings across London

FAQ

Building Regulations Drawings in Collier Row RM5 — FAQs

Do I need building regulations approval as well as planning permission?+

Almost always, yes. Planning permission covers what the building looks like; building regulations cover how safely it is built. Most extensions and loft conversions need both.

How long does Building Control approval take?+

A Full Plans application is typically assessed within about five weeks. We prepare a complete package and respond to any conditions promptly, so approval is not held up by missing detail.

Can building regulations drawings be done after planning approval?+

Yes. Many homeowners secure planning permission first, then commission the building regulations package before starting on site. We can pick a project up at either stage.

Are structural calculations included?+

Yes — we produce structural drawings and calculations in-house as part of the building regulations package, so your builder has everything to price and build.

Can you submit to Building Control for me?+

Yes, we prepare and submit the Full Plans package and respond to any Building Control queries.

Do I need planning permission to extend a house in Collier Row?+

Not always. Many Collier Row semis retain permitted development rights, so a modest single-storey rear extension or a hip-to-gable loft conversion can often proceed without a full planning application. Because the plots are regular but finite and the gap between pairs is protected, we check your property's size limits and building lines against Havering's controls first, and prepare a full householder application where the project goes beyond permitted development — as a two-storey side extension often will.

Is Collier Row in a conservation area?+

No. There is no conservation area covering Collier Row. Its planning character is shaped instead by its uniform interwar semi-detached suburban roads and Havering's householder design expectations, which favour keeping the semi-detached rhythm, the gaps between pairs and the original materials intact when you extend.

How much do planning and building-regulation drawings cost for a Collier Row extension?+

We work to fixed fees agreed before we start, with a typical turnaround of around seven days for a standard rear extension, side extension or loft on a Collier Row semi. As a chartered architectural technologist practice we produce the same council-accepted planning and building-regulation drawings as an architect, usually for a lower fee, and include free redraws until your application is approved.

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