# Reconstruction, extension and terraced house design in Latvia

> Design for reconstructing and extending existing buildings and for new terraced and semi-detached houses. We assess the approval route, prepare the documents and submit them in BIS.

- URL: https://line-78.com/en/parbuve-piebuve-rindu-majas
- Language: en
- Other language: https://line-78.com/parbuve-piebuve-rindu-majas
- Publisher: SIA "LINE 78", architecture studio, Mārupe, Latvia — https://line-78.com/

# Reconstruction, extensions and terraced houses

LINE 78 designs reconstructions and extensions of existing buildings, as well as new terraced and semi-detached houses, for private clients and small developers. We first establish which approval route the project needs, and only then start designing.

- **Reconstruction and extensions:** existing residential and non-residential buildings
- **Terraced and semi-detached houses:** new construction with a building permit
- **Price:** by scope; 55–75 €/m² for new buildings
- **Where we work:** all of Latvia, office in Mārupe

[Message on WhatsApp](https://wa.me/37120267300)[+371 20267300](tel:+37120267300)

## Reconstruction and renovation

Reconstruction changes a building's load-bearing structure, layout or engineering systems. The approval route depends on the building group and on whether its volume or use changes. For example, reconstructing a second-group one- or two-dwelling house without changing its volume or use may need only a building notification (Building Regulations, point 7.1¹, sub-point 6, with exceptions).

Before design we survey the building and, where needed, bring in a structural engineer, so that the reconstruction is based on the actual condition rather than assumptions.

## Extensions

An extension increases a building's volume, so the lighter routes meant for works without volume changes do not apply. Whether an explanatory report is enough or a building permit is needed depends on the building group and the floor area after the extension. We check this in the first conversation.

An extension has to join the existing building both structurally and architecturally: foundations, roof, insulation and facade. That is why we design it together with a survey of the existing building.

## Terraced and semi-detached houses

A building with more than one dwelling cannot use the lighter routes meant for a single-dwelling house, so a terraced or semi-detached house needs a building permit and a design in minimum scope. The design also has to resolve fire separation between units, sound insulation and separate utility connections for each dwelling.

For developers we can help at the plot selection stage: how many units and how much floor area the building rules allow there.

## How the work goes

1.  Conversation and document review: cadastral data, existing building documents, building rules.
2.  Choosing the approval route: notification, explanatory report or building permit.
3.  Survey of the existing building, for a reconstruction or extension.
4.  Concept, documentation and submission in the Construction Information System (BIS).
5.  Responses to the building authority and support during construction.

## FAQ

### Does an extension need a building permit?

Not always. It depends on the building group and the floor area after the extension: sometimes an explanatory report is enough, sometimes a permit is needed. We check this before design.

### How much does a reconstruction or extension design cost?

We price it by scope, because work on an existing building differs from case to case. A new building design costs 55 €/m² for architecture and site layout or 75 €/m² for the full design.

### Does a terraced house need a building permit?

Yes. A house with more than one dwelling needs a building permit and a design in minimum scope.

### What do you need to start?

The address or cadastral number, any documents for the existing building, and a description of what you want to change or build. Message us on WhatsApp at +371 20267300 or write to line78.info@gmail.com.

[What you can build without a permit →](https://line-78.com/en/blog/ko-var-celt-bez-buvatlaujas)[Private house design →](https://line-78.com/en/privatmajas-projekts)[Contact us →](https://line-78.com/en/contact)

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Contact LINE 78: +371 20267300 (also WhatsApp), line78.info@gmail.com, Instagram @line78_architecture, Gaujas iela 118-12, Mārupe, LV-2167, Latvia.